Tiêu chuẩn Việt Nam tcvn 6259 -1A : 2003 potx

tiu chuán viẻt nam tcvn 6259 -2a : 2003 qui phm phàn cảp vĂ ẵĩng tĂu bièn vị thắp phÃn 2A kặt cảu thàn tĂu vĂ trang thiặt b tĂu dĂi tữ 90 mắt trờ ln Rules for the Classification and Construction of Sea-going Steel Ships Part 2A Hull Construction and Equipment of Ships of 90 metres and over in Length chừỗng 1.1 qui ẵnh chung Qui ẵnh chung 1.1.1 Ph−m vi Ÿp dịng Nhùng qui ½Ùnh Ph·n n¡y ½õìc Ÿp dịng cho cŸc t¡u cÜ chiËu dĂi tữ 90 mắt trờ ln, cĩ hệnh dng vĂ tì sõ kẽch thừốc thỏng thừộng, cĩ vùng hot ẵổng kháng h−n chỈ ‡âi vèi nhùng t¡u cÜ vïng hot ẵổng hn chặ, kặt cảu thàn tĂu, trang thiặt b vĂ kẽch thừốc cỗ cảu cĩ thè ẵừỡc thay ½äi phï hìp vèi ½iËu kiỴn khai thŸc Khi p dũng nhựng qui ẵnh từỗng ửng ca PhÃn nĂy cho cŸc t¡u kháng Ÿp dịng nhùng qui ½Ùnh ê TCVN 6259 -11 :2003 - Ph·n 11 “M−n khá” (sau ẵày gi lĂ PhÃn 11), Lf ẵừỡc lảy bng L vĂ Bf ẵừỡc lảy bng B 1.1.2 Trừộng hỡp p dũng ẵc biẻt õi vối cc tĂu cĩ chiậu dĂi quŸ lèn ho´c vƯ lû riÅng n¡o ½Ü m¡ khỏng thè p dũng trỳc tiặp nhựng qui ẵnh ca PhÃn nĂy, ng kièm s xem xắt vĂ quyặt ẵnh t÷ng trõéng hìp cị thÌ, kháng phị thc v¡o nhùng qui ½Ùnh ê 1.1.1 1.1.3 CŸc t¡u cÜ hƯnh dŸng v¡ t× sâ kÏch thõèc khŸc thõéng ho´c t¡u dùng ẵè chờ hĂng ẵc biẻt õi vối cc t¡u cÜ hƯnh dŸng v¡ t× sâ kÏch thõèc khŸc thừộng hoc tĂu dùng ẵè chờ hĂng ẵc biẻt, nhựng qui ẵnh cĩ lin quan ẵặn kặt cảu thàn tĂu, trang thiặt b vĂ kẽch thừốc cỗ cảu s ẵừỡc qui ½Ùnh riÅng dúa trÅn nhùng nguyÅn t°c chung cða Qui ph−m thay cho nhùng qui ½Ùnh ê Ph·n n¡y ‡âi vèi nhùng t¡u ½õìc dú ½Ùnh chê gå sợc khoang vĂ/ hoc trn boong, ngoĂi viẻc phăi ghi kỷ hiẻu ẵừộng nừốc chờ hĂng từỗng ửng vối d¶u m−n chê gå phï hìp vèi cŸc qui ẵnh PhÃn 11, cc thĂnh phÃn kặt cảu thàn tĂu cín phăi ẵừỡc băo vẻ ỗ mửc ẵổ hỡp lỷ ẵừỡc ng kièm chảp nhn NgoĂi ra, ẵõi vối cc tĂu ẵừỡc dỳ ẵnh chờ gồ sợc trn boong cín phăi xem xắt ẵc biẻt ẵặn viẻc xặp vĂ chng buổc gồ Cc kặt cảu boong ẵè chờ xe cổ v.v phăi p dũng cc qui ẵnh 8.9 vĂ 15.3.5 Viẻc gia cừộng ẵè chờ Cỏng te nỗ phăi ẵừỡc thỳc hiẻn phù hỡp vối cc qui ẵnh ca 30.2.1, cc kặt cảu ẵở cỏng te nỗ, nặu cĩ, phăi phù hỡp vối cc qui ẵnh ca 30.7 1.1.4 TĂu khch Nặu khỏng cĩ qui ẵnh nĂo khc, kặt cảu thàn tĂu, trang thiặt b vĂ kẽch thừốc cỗ cảu ca tĂu khch ẵừỡc qui ẵnh t−i TCVN 6259-9:2003 - Ph·n 8F “T¡u khŸch” 11 tcvn 6259 -2A :2003, Chừỗng 1.1.5 Thay thặ từỗng ẵừỗng Kặt cảu thàn tĂu, trang thiặt b, bõ trẽ vĂ kẽch thừốc cỗ cảu ca tĂu khc vối nhựng qui ½Ùnh ê Ph·n n¡y sÁ ½õìc ‡¯ng kiÌm ch¶p nhºn nặu xắt thảy chợng từỗng ẵừỗng vối nhựng qui ẵnh ê Ph·n n¡y 1.1.6 än ½Ùnh Nhùng qui ½Ùnh ê PhÃn nĂy ẵừỡc p dũng cho cc tĂu ẵơ cĩ ẵ ọn ẵnh tảt că cc trng thi theo u c·u Tuy vºy, ‡¯ng kiÌm nh¶n m−nh r±ng ngõéi thiặt kặ tĂu, ẵĩng tĂu vĂ ch tĂu vạn phăi quan tàm ẵặn tẽnh ọn ẵnh ca tĂu qu trệnh ẵĩng mối vĂ khai thc 1.1.7 Vt liẻu Nặu khỏng cĩ qui ẵnh nĂo khc, thệ nhựng yu cÃu PhÃn nĂy ẵừỡc dỳa trn cỗ sờ nhựng yÅu c·u cða TCVN 6259 -7-:2003 - Ph·n 7A “Vºt liẻu (sau ẵày gi lĂ PhÃn 7A) Khi sứ dũng thắp cĩ ẵổ bận cao qui ẵnh Chừỗng 3, PhÃn 7A, kặt cảu vĂ kẽch thừốc ca cỗ cảu thàn tĂu phăi thịa mơn nhựng yu cÃu tữ (1) ẵặn (3) dừối ẵày : (1) Mỏ ẵun chõng uõn ca tiặt diẻn ngang thàn tĂu phăi khỏng nhị hỗn tr sõ tẽnh theo Chừỗng 13 nhàn vối hẻ sõ sau ẵày : 0,78 - Khi dùng thắp cĩ ½æ bËn cao A 32, D 32, E 32 ho´c F32 0,72 - Khi dùng thắp cĩ ẵổ bận cao A 36, D 36, E 36 ho´c F36 Ph−m vi sứ dũng ca thắp cĩ ẵổ bận cao phăi ẵừỡc ng kièm xem xắt vĂ quyặt ẵnh tững trừộng hìp cị thÌ (2) ChiËu d¡y tán boong, tán bao, má ½un châng uân cða cŸc nÂp gia cõéng v¡ kẽch thừốc cỗ cảu khỏng theo cc yu cÃu -1 trn phăi ẵừỡc ng kièm xem xắt vĂ quyặt ½Ùnh t÷ng trõéng hìp cị thÌ (3) Khi dïng thắp cĩ ẵổ bận cao khc vối loi thắp nu -2, kẽch thừốc cc cỗ cảu thàn tĂu phăi ẵừỡc xem xắt ẵc biẻt tững trừộng hỡp cũ thè Nặu dùng thắp khỏng hoc thắp cĩ lốp bc khỏng qui ẵnh Chừỗng 3, PhÃn 7A, lĂm cc cỗ cảu chẽnh thàn tĂu, thệ viẻc dùng vt liẻu vĂ kẽch thừốc cc cỗ cảu thàn tĂu ẵĩ phăi thịa mơn nhựng qui ẵnh sau: (1) Yu cÃu -2 ẵừỡc p dũng nhừng hẻ sõ k ẵừỡc lảy bng tr sõ tẽnh theo cỏng thửc sau (lĂm trín ẵặn sõ thp phàn) nhừng khỏng nhị hỗn 0,72 : y y K = f {8,81( ) − 7,56( ) + 2.29} 1000 1000 Trong ẵĩ : - y - ổ bận chăy hoc ửng suảt thứ ca thắp khỏng hoc thắp cĩ lèp bàc kháng g×, N/ mm2 - f - TrÙ sâ tÏnh theo cáng thöc sau: f = 0,0025 (T - 60) + 1,0 Vối T lĂ nhiẻt ẵổ lốn nhảt ca hĂng hĩa tiặp xợc vối vt liẻu thàn tĂu, tẽnh bng oC Nặu T < 60oC thệ lảy bng 60oC, nặu T > 100oC thệ ng kièm phăi xem xắt ẵc biẻt (2) Nặu dùng vt liẻu cĩ tẽnh chõng n mín hựu hiẻu ẵõi vối loi hĂng hÜa dú ½Ùnh chun chê thƯ ‡¯ng kiÌm cÜ thÌ xem xắt ẵè giăm qui cch cc cỗ cảu từỗng ửng mổt cch thẽch hỡp Nặu dùng vt liẻu khỏng phăi lĂ thắp ẵè lĂm cc cỗ cảu chẽnh thàn tĂu, thệ viẻc dùng vt liẻu ẵĩ vĂ kẽch thừốc cc cỗ cảu từỗng ửng phăi ẵừỡc ng kièm xem xắt ẵc biẻt Nặu dùng vt liẻu khc vối loi vt liẻu qui ẵnh Qui phm nĂy ẵè lĂm cc cỗ cảu thàn tĂu, thệ viẻc dùng vt liẻu ẵĩ vĂ kẽch thừốc cc cỗ cảu từỗng ửng phăi ẵừỡc ng kièm xem xắt ẵc biẻt Viẻc dùng vt liẻu ẵè lĂm cc cỗ cảu thàn t¡u cða nhùng t¡u ho−t ½ỉng ê vïng ven biÌn cĩ thè ẵừỡc ng kièm xem xắt qui ẵnh t÷ng trõéng hìp cị thÌ 12 tcvn 6259 -2A :2003, Chừỗng 1.1.8 Kặt cảu phíng chõng chy Kặt cảu phíng chõng chy phăi thịa mơn cc qui ẵnh TCVN 6259 -5 :2003 - Ph·n “PhÝng, phŸt hiỴn vĂ chựa chy (sau ẵày gi lĂ PhÃn 5) 1.1.9 Phừỗng tiẻn thot nn Phừỗng tiẻn thot nn phăi thịa mơn cc qui ẵnh PhÃn 1.1.10 Phừỗng tiẻn kiÌm tra ê cŸc khoang nhõ khoang mđi, khoang ½i, kắt sàu, khoang cch li, khoang dÃu hĂng, khoang hĂng cĩ kắt hỏng từỗng ẵõi cao vĂ cc khỏng gian kẽn từỗng tỳ phăi cĩ cc phừỗng tiẻn ẵè tiặp cn ẵừỡc nhựng nỗi cÃn thiặt nhừ : dĂn do, thang tay, thang cõ ẵnh hoc cc phừỗng tiẻn từỗng tú ½Ì kiÌm tra mưc ½ỉ an to¡n bÅn thàn tĂu Tuy nhin, cc phừỗng tiẻn nĂy khỏng bt buổc phăi bõ trẽ khoang ẵuỏi, kắt sàu khỏng dùng ẵè chửa nhin liẻu hoc dÃu bỏi trỗn 1.1.11 Sứ dũng thắp Thắp dùng cho kặt cảu thàn tĂu phăi lĂ cc cảp thắp nhừ qui ẵnh PhÃn 7A phù hỡp vối cc yu cÃu Băng 2A/1.1 vĂ 2A/1.2 Theo cc yu cÃu nĂy cảp thắp B, D ho´c E cÜ thÌ thay thỈ cho A; D ho´c E cÜ thÌ thay thỈ cho B; E cÜ thÌ thay thỈ cho D; D 32, E 32 ho´c F 32 cÜ thÌ thay thỈ cho A 32; E 32 ho´c F 32 cÜ thÌ thay thỈ cho D 32; F 32 cÜ thÌ thay thỈ cho E 32; D 36, E 36 ho´c F 36 cÜ thÌ thay thỈ cho A 36; E 36 ho´c F 36 cÜ thÌ thay thỈ cho D 36; F 36 cÜ thè thay thặ cho E 36 ẵon 0,4 L giựa tĂu, dăi tỏn ẵỗn ca mắp mn kậ vối boong tẽnh ton, dăi tỏn mắp ca boong tẽnh ton, dăi tỏn hỏng, dăi tỏn boong kậ vối vch dc vĂ cc cỗ cảu lĂm bng thắp cảp E, E 32 vĂ KE36 phăi cĩ chiậu rổng (b) khỏng nhị hỗn tr sõ tẽnh theo cỏng thửc sau ẵày, lốn nhảt lĂ bng 1800 mi-li-mắt õi vối mắp mn lừỡn, chiậu rổng ca dăi tỏn mắp mn phăi thịa m¬n u c·u cða ‡¯ng kiÌm 800 (mm) b = L1 + Trong ½Ü : L1 : ChiËu d¡i t¡u qui ½Ùnh ê 1.2.16 TCVN 6259 -1 :2003 - Ph·n 1A “Qui ½Ùnh chung vË ho−t ½ỉng giŸm sŸt” (sau ẵày gi lĂ PhÃn 1A) hoc 0,97 chiậu dĂi tĂu ẵo trn ẵừộng nừốc chờ hĂng thiặt kặ, lảy gi tr nĂo nhị hỗn (m ) Nặu dùng thắp khỏng hoc thắp cĩ lốp bc khỏng qui ẵnh Chừỗng 3, PhÃn 7A lĂm cc cỗ cảu thàn tĂu, thệ Băng 2A/1.1 vĂ 2A/1.2 phăi ẵừỡc Ÿp dịng phï hìp vèi chiËu d¡y cða vºt liỴu cỗ băn thay cho chiậu dĂy ca tảm Cĩ thè dùng thắp cảp E, E32, vĂ E36 cĩ chiậu dĂy tữ 50 ẵặn 100 mi-li-mắt ẵè lĂm sõng ẵuỏi tĂu Nặu dùng thắp cĩ chiậu dĂy lốn hỗn 50 mi-li-mắt lĂm kặt cảu thàn tĂu, trữ sõng ẵuỏi, phăi ẵừỡc ng kièm chảp thun Trừộng hỡp dùng thắp cĩ ẵc tẽnh khc vối qui ẵnh Băng 2A/ 1.1 v¡ 2A/ 1.2 thƯ viỴc sø dịng lo−i thắp ẵĩ phăi ẵừỡc ng kièm xem xắt ẵc biẻt trn cỗ sờ ẵc tẽnh vĂ qui cch ca nĩ ½õìc trƯnh dut 1.1.12 Qui ½Ùnh ½´c biỴt ½âi vèi viẻc sứ dũng thắp õi vối nhựng tĂu ẵừỡc thiặt kặ trn cỗ sờ xc ẵnh nhiẻt ẵổ thiặt kặ (TD) ẵè hot ẵổng làu dĂi vùng cĩ nhiẻt ẵổ thảp (vẽ dũ: vùng Bc cỳc hoc Nam cỳc), thệ viẻc dùng thắp lĂm cc cỗ cảu thàn tĂu phăi phù hỡp vối nhiẻt ẵổ thiặt kặ, ngoĂi nhựng qui ẵnh vậ sứ dũng thắp Băng 2A/1.1 v¡ 2A/1.2 ‡âi vèi nhùng t¡u chê h¡ng cÜ nhiẻt ẵổ thảp (vẽ dũ: hĂng ẵỏng lnh), viẻc sứ dũng loi thắp lĂm cc cỗ cảu dc thàn tĂu phăi phù hỡp vối nhiẻt ẵổ thiặt kặ (TD), trõéng hìp TD ½õìc xŸc ½Ùnh, ngo¡i nhùng qui ½Ùnh 13 tcvn 6259 -2A :2003, Chừỗng vậ viẻc sứ dũng thắp Băng 2A/1.1 vĂ 2A/1.2 Nhựng tĂu tuàn th cc qui ẵnh -1 vĂ -2 ẵừỡc ẵng kỷ vối cc kỷ hiẻu thè hiẻn rò viẻc tuàn th nĂy 1.1.13 Kẽch thừốc cỗ cảu Kẽch thừốc ca cc cỗ cảu ẵon giựa, ẵon mủi v¡ ½o−n ½i t¡u l¡ kÏch thõèc Ÿp dịng cho cc cỗ cảu cc ẵon thàn tĂu qui ẵinh từỗng ửng 1.2.23 vĂ 1.2.24 PhÃn 1A Viẻc giăm kẽch thừốc ca cỗ cảu thàn tĂu tữ giựa tĂu vậ mủi vĂ ẵuỏi phăi cõ gng thỳc hiẻn dÃn dÃn Nặu khỏng cĩ qui ẵnh nĂo khc, thƯ má ½un châng n theo u c·u cða Qui phm lĂ ca tiặt diẻn cỗ cảu thàn tĂu bao góm că mắp km Mắp km ẵừỡc lảy rổng bng 0,1l vậ mồi bn ca cỗ cảu nhừng khỏng ẵừỡc lốn hỗn mổt nứa khoăng cch cc cỗ cảu, l lĂ chiậu dĂi nhp ca cỗ cảu lảy theo cc qui ½Ùnh cÜ liÅn quan Khi tÏnh toŸn Má ẵun chõng uõn tiặt diẻn ca cc cỗ dc hoc np dc, nặu cc cỗ cảu nĂy ẵừỡc ẵở hựu hiẻu phẽa nhp l ẵừỡc nu cỏng thửc, thƯ trÙ sâ Má ½un châng n cÜ thÌ ½õìc giăm thẽch hỡp Nặu dùng thắp dt, thắp gĩc hoc tảm b mắp ẵè lĂm cc xĂ, sừộn, np cĩ mỏ ẵun chõng uõn tiặt diẻn ẵơ ẵừỡc xc ẵnh theo qui phm, thệ chợng phăi cĩ chiậu cao v¡ chiËu d¡y phï hìp vèi má ½un châng n tiặt diẻn ẵơ xc ẵnh ẵĩ õi vối cc cỗ cảu nhừ sõng, ẵĂ ngang cĩ diẻn tẽch tiặt diẻn băn mắp ẵừỡc xc ẵnh, chiậu rổng băn mắp (b) phăi khỏng nhị hỗn tr sõ tẽnh theo cỏng thöc sau : b= 100 A + 1,5t t (mm) Trong ẵĩ : A : Diẻn tẽch tiặt diẻn băn mắp theo yu cÃu (cm2) t : Chiậu dĂy băn thĂnh (mm) 1.1.14 Lin kặt mợt ca cc np, sõng vĂ sừộn Nặu mợt ca cc sõng ẵừỡc lin kặt vối vch, ẵy trn,v.v , thệ cc mõi lin kặt mợt ảy ca cc sõng phăi ẵừỡc càn bng bời cc cỗ cảu ẵở hựu hiẻu mt bn ca vch, ẵy trn,v.v Nặu khỏng cĩ qui ½Ùnh n¡o khŸc, thƯ chiËu d¡i c−nh ½ưng cða mơ lin kặt vối sừộn hoc np ca vch hoc kắt sàu,v.v , phăi khỏng nhị hỗn 1/8 ca l theo cŸc qui ½Ùnh cÜ liÅn quan Trõéng hìp nặu np ẵở cc dÃm dc xuyn qua cc ẵĂ ngang ẵy hoc cc sõng ngang cc kắt, thệ lin kặt ca cc np vối cc dÃm dc phăi cĩ ẵ ẵổ bận mịi ẵè chu ẵũng ẵừỡc p lỳc thy ẵổng pht sinh kắt Chiậu dĂy ca np khỏng ẵừỡc nhị hỗn chiậu dĂy tõi thièu qui ½Ùnh cho cŸc ½¡ ngang ½Ÿy ho´c cŸc sâng ngang (nặu ẵt np) vĂ chiậu cao ca np khỏng ẵừỡc nhị hỗn chiậu cao ẵĂ ngang ẵy hoc sõng ngang ẵơ trữ ẵi chiậu cao ca cc dÃm dc, hoc từỗng ẵừỗng 1.1.15 Mơ Kẽch thừốc ca mơ phăi ½õìc xŸc ½Ùnh tïy thc chiËu d¡i c−nh liÅn kỈt dĂi hỗn theo Băng 2A/1.3 Chiậu dĂy ca mơ phăi ẵừỡc tng thẽch ẵng nặu chiậu cao tiặt diẻn hiẻu dũng ca mơ nhị hỗn 2/3 chiậu cao tiặt diẻn ca mơ theo yu cÃu Nặu mơ cĩ lồ khoắt giăm trng lừỡng thệ khoăng cch tữ mắp lồ khoắt ẵặn cnh tỳ ca mơ phăi khỏng nhị hỗn ẵừộng kẽnh lồ khoắt Nặu chiậu dĂi cnh lin kặt dĂi hỗn ca mơ lốn hỗn 800 mi-li-mắt thệ cnh tỳ ca mơ phăi ẵừỡc gia cừộng bng mắp b hoc bng hệnh thửc khc trữ mơ ẵĩ lĂ mơ chõng hoc cỗ cảu từỗng tỳ 14 tcvn 6259 -2A :2003, Chừỗng Băng 2A/1.1 Tn cỗ cảu Tỏn mắp mn kậ boong tẽnh toŸn Tán m−n ê ph−m vi 0,4 L giùa t¡u Danh mũc sứ dũng thắp ẵĩng tĂu thỏng thừộng Vùng sø dịng T¶m m−n Ph−m vi 0,4 L giùa t¡u L1 ≤ 250 L1 > 250 Ph−m vi 0,6L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng nÅu trÅn Ph−m vi 0,1 D trê xuâng tÏnh t÷ m´t dõèi cða boong tÏnh toŸn Ngo¡i vïng nÅu trÅn L1 > 250 Ph−m vi 0,4 L giựa tĂu Dăi tỏn hỏng Phm vi 0,6 L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng trÅn TĂu cĩ 150 < L1 250, cĩ kặt cảu ẵy ẵỏi hoc ẵy ẵỗn TĂu cĩ L1 150 cĩ kặt cảu ẵy ẵỏi L1 > 250 Chiậu dĂy tán t (mm) 15 < 20 < 25 < 30 < 40 < ≤ 15 ≤ 20 ≤ 50 A B t t B A B A E D D E B D E D B E D E D A E B D E D A A A B B B A B D D A E B D B D A A D B E D A A E B B D A A E D E B B A E D B B Ph−m vi 0,4 L giùa t¡u E E A A D D D E A Miẻng khoang mờ rổng Khc vối qui ẵnh trn ph−m vi 0,4 L giùa t¡u Ph−m vi 0,4 L giựa tĂu Tảm vch dc Dăi tỏn trn cða vŸch doc kË vèi boong tÏnh toŸn ph−m vi 0,4 L giựa tĂu Dăi tỏn dừối ca vch dc kậ vối tảm ẵảy phm vi 0,4 L giựa tĂu Cc cĩ cảu dc Dăi tỏn trn ca vch nghing kắt ẵình mn kậ vối boong tÏnh toŸn ph−m vi 0,4 L giùa t¡u GÜc miỴng khoang cða boong tÏnh toŸn Boong lỉ thiÅn D B B Ph−m vi 0,6 L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng nÅu trÅn Boong tÏnh toŸn khŸc vèi qui ½Ùnh trÅn E D A t ≤ 40 A Phm vi 0,4 L giựa tĂu Dăi tỏn mắp ca boong tÏnh toŸn ≤ 30 D E L1 > 250 T¶m boong L1 ≤ 250 Ph−m vi 0,4 L giùa t¡u L1 > 250 Ph−m vi 0,6 L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng nÅu trÅn Ph−m vi 0,4 L giùa t¡u t A L1 ≤ 250 Tán ½Ÿy kè că dăi tỏn giựa ẵy t 25 A L1 250 Dăi tỏn boong tẽnh ton kậ vối vŸch dàc t E B B D D D E 15 tcvn 6259 -2A :2003, Chừỗng Băng 2A/1.1 Danh mũc sứ dũng thắp ẵĩng tĂu thỏng thừộng (tiặp theo) Cc cỗ cảu dc nm phẽa trn ca boong tẽnh ton kè că cc mơ vĂ băn mắp ca cỗ c¶u dàc ph−m vi 0,4 L giùa t¡u A B D E Miẻng hÃm hĂng Tảm thĂnh vĂ băn mắp ca thĂnh dc miẻng hÃm kắo dĂi trn boong tẽnh ton Cỗ cảu dc lin tũc D Phm vi 0,4L giùa t¡u E D Ph−m vi 0,6L giùa t¡u, ngoĂi vùng trn NgoĂi cc vùng nu trn Cỗ cảu dc dĂi hỗn 0,15 L ngoĂi cc cỗ cảu trn Ph−m vi 0,4L giùa t¡u E D A B D E A A A B B B D D D E E E Sâng ½uái Sâng ½uái, giŸ bŸnh lŸi, giŸ chù nhµn Tán bŸnh lŸi Tán bŸnh lŸi CŸc cĩ cảu khc Cc cỗ cảu khc vối cc cỗ cảu nu trn 16 A tcvn 6259 -2A :2003, Chừỗng Băng 2A/1.2 Tn cỗ cảu Tỏn mắp mn kậ boong tÏnh toŸn Tán m−n ê ph−m vi 0,4 L giựa tĂu Vùng sứ dũng Tảm vị L1 250 Ph−m vi 0,4L giùa t¡u L1 > 250 Ph−m vi 0,6L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng nÅu trÅn Ph−m vi 0,1 D trê xuâng tÏnh t÷ m´t dõèi cða boong tÏnh toŸn Ngo¡i vïng nÅu trÅn Ph−m vi TĂu cĩ L1 > 250 0,4 L giựa tĂu Dăi tán háng Ph−m vi 0,6 L giùa t¡u ngo¡i vïng nu trn NgoĂi vùng nu trn Tỏn ẵy kè că dăi tỏn giựa ẵy Dăi tỏn mắp ca boong tẽnh ton Dăi tỏn boong tẽnh ton lin kặt vối vch dc Danh mũc sứ dũng thắp cĩ ẵổ bận cao ChiËu d¡y tán t ( mm ) 15 < 20 < 25 < 30 < t t ≤ 15 ≤ 20 Boong læ thiÅn ≤ 25 AH t ≤ 30 AH 40 < t ≤ 50 t ≤ 40 DH EH EH DH EH DH DH EH AH AH AH DH DH EH T¡u cÜ 150 < L1 ≤ 250 cĩ kặt cảu ẵy ẵỏi hoc ẵy ẵỗn TĂu cĩ L1 ≤ 150 T¡u cÜ L1 > 250 AH DH EH AH DH EH EH T¡u cÜ L1 ≤ 250 AH DH EH DH T¡u cÜ L1 > 250 T¡u cÜ L1 ≤ 250 DH AH T¶m boong L1 ≤ 250 Ph−m vi 0,4 L giùa t¡u L1 >250 Ph−m vi 0,6 L giùa t¡u ngo¡i vïng trÅn Ngo¡i vïng nÅu trÅn Ph−m vi 0,4 L giùa t¡u Ngo¡i vïng nÅu trÅn ph−m vi 0,4 L giùa t¡u DH EH AH EH EH DH EH AH AH DH DH EH AH DH AH DH AH DH AH DH AH EH DH DH AH EH EH AH Ph−m vi 0,4 L giựa tĂu Tảm vch dc Dăi tỏn trn kË vèi boong tÏnh toŸn cða vŸch dàc ph−m vi 0,4 L giựa tĂu Dăi tỏn dừối kậ vèi ½Ÿy cða vŸch dàc ph−m vi 0,4 L giùa t¡u DH AH Ph−m vi 0,4 L giùa t¡u MiỴng khoang mê rỉng DH AH Ph−m vi 0,4 L giùa t¡u Ph−m vi 0,6 L giùa t¡u ngo¡i vïng nÅu trÅn Tán boong chÙu lúc khŸc vèi vïng trÅn GÜc miỴng khoang ê boong tÏnh toŸn t EH EH 17 tcvn 6259 -2A :2003, Chừỗng Băng 2A/1.2 Danh mũc sứ dũng thắp cĩ ẵổ bận cao (tiặp theo) Cc cỗ cảu dc Dăi tỏn trn kậ vối boong tẽnh ton ca vch nghing kắt ẵình mn phm vi 0,4 L giựa tĂu Cc cỗ cảu dc nm phẽa trn ca boong tẽnh ton kè că mơ vĂ băn mắp cỗ cảu dc phm vi 0,4 L giùa t¡u AH DH EH AH DH EH MiỴng hÃm hĂng Cỗ cảu dc lin tũc DH Phm vi 0,4 L giựa tĂu Tảm thĂnh vĂ băn mắp ca th¡nh dàc miỴng khoang h¡ng ê boong tÏnh toŸn DH Ph−m vi 0,6 L giùa t¡u ngo¡i vïng nÅu trÅn NgoĂi vùng nu trn Cỗ ccảu dc dĂi hỗn 0,15 L, ngoĂi cc cỗ cảu trn Phm vi 0,4 L giùa t¡u EH DH EH AH DH EH AH DH EH AH DH EH Sâng ½uái Sâng ½uái, giŸ bŸnh li, gi chự nhàn Tỏn bnh li Cc cỗ cảu khc cín li Bnh li Cc cỗ cảu khc AH Chợ thẽch : L1 lĂ chiậu dĂi tĂu ẵừỡc qui ½Ùnh ê 1.2.16 Ph·n 1A ho´c 0,97 chiËu d¡i tĂu ẵo trn ẵừộng nừốc chờ hĂng thiặt kặ, lảy gi tr nĂo nhị hỗn (m) Viẻc sứ dũng thắp lĂm tảm boong lin kặt vối cc vch dc ca t¡u cÜ chiËu rỉng xŸc ½Ùnh theo 2.1.4 ê Ph·n 1A nặu vừỡt qu 70 m, thệ ng kièm phăi xem xắt ẵc biẻt Trong Băng 2A/ 1.1 vĂ 2A/ 1.2, phÃn ẵừỡc gi lĂ dăi tỏn hỏng lĂ phÃn sau ẵày: (1) Nặu ẵừộng giối hn tảm ẵy khỏng song song vối ẵừộng tàm tĂu vùng 0,6L giùa t¡u, thÖ ph·n n¡y n±m vïng 0,6L giùa tĂu; (2) Nặu ẵừộng giối hn tảm ẵy khỏng song song vối ẵừộng tàm tĂu ngoĂi vùng 0,6L giựa tĂu, thệ phÃn nĂy nm vùng từỗng ửng õi vèi bŸnh lŸi v¡ tán bao bŸnh lŸi, viỴc sø dïng th¾p ê vïng chât dõèi cða bŸnh lŸi kiÌu D , E v¡ ê vïng trÅn cïng cða bŸnh li kièu C qui ẵnh Chừỗng 25 phăi ẵừỡc ng kièm xem xắt ẵc biẻt 18 tcvn 6259 -2A :2003, Chừỗng Băng 2A/1.3 Mơ (ỗn v : mm) Chiậu dĂi ca cnh lin kặt dĂi hỗn 150 200 250 300 350 400 450 500 550 600 650 1.1.16 ChiËu d¡y M¬ ph²ng 6,5 7,0 8,0 8,5 9,0 10,0 10,5 11,0 12,0 12,5 13,0 Mơ cĩ mắp 6,5 6,5 7,0 7,0 8,0 8,0 8,5 8,5 9,0 9,0 ChiËu rỉng m¾p 30 30 40 40 50 50 55 55 60 60 Chiậu dĂi ca cnh lin kặt dĂi hỗn 700 750 800 850 900 950 1.000 1.050 1.100 1.150 Chiậu dĂy Mơ phng 14,0 14,5 - Mơ cĩ mắp 9,5 10,0 10,5 11,0 11,0 11,5 11,5 12,0 12,5 12,5 ChiËu rỉng m¾p 70 70 80 85 90 90 95 100 105 110 Thay ½äi chiËu d¡i nhÙp ( l ) mơ dĂy hỗn Khi mơ lin kặt dĂy hỗn băn thĂnh ca sõng thệ tr sõ l qui ẵnh Chừỗng vĂ tữ Chừỗng ẵặn Chừỗng 12 cĩ thè ẵừỡc thay ẵọi phù hỡp nhừ sau : (1) Nặu diẻn tẽch tiặt diẻn băn mắp ca mơ lốn hỗn mổt nứa diẻn tẽch tiặt diẻn băn mắp ca sõng vĂ băn mắp ca sõng ẵừỡc kắo tối vch, boong, ẵy trn,v.v , thệ l cĩ thè ẵừỡc ẵo ẵặn ẵièm cch ẵình mơ 0,15 mắt vĂo phẽa ca mơ (2) Khi diẻn tẽch tiặt diẻn băn mắp ca mơ nhị hỗn 1/2 diẻn tẽch tiặt diẻn băn mắp ca sõng vĂ băn mắp ca sõng ẵừỡc kắo tối vch, boong, ẵy trn,v.v , thệ l cĩ thè ẵừỡc ẵo ẵặn ẵièm mĂ ti ẵĩ tọng diẻn tẽch tiặt diẻn ngang ca mơ kè că băn mắp, ngoĂi giối hn ca sõng, bng diẻn tẽch tiặt diẻn băn mắp ca sõng hoc ẵặn ẵièm cch ẵình mơ 0,15 mắt vĂo phẽa mơ, lảy tr sõ nĂo lốn hỗn (3) Khi cĩ gn mơ vĂ băn mắp ca sõng chy dĂi theo cnh tỳ ca mơ cho ẵặn vch, boong, ẵy trn,v.v , kè că cnh tỳ ca mơ ẵừỡc lừỡn trín thệ l vạn ẵừỡc ẵo ẵặn ẵình mơ (4) Mơ ½õìc xem l¡ kháng cÜ tŸc dịng ê phÏa ngo¡i ½iÌm m¡ t−i ½Ü c−nh liÅn kỈt dàc theo sâng ca mơ bng 1,5 lÃn chiậu dĂi cnh lin kặt ca mơ vối vch, boong, ẵy trn,v.v (5) Khỏng ẵừỡc giăm l mồi ẵÃu ẵi mổt lừỡng lốn hỗn 1/4 chiậu dĂi toĂn bổ ca sõng kè că lin kặt hai ẵÃu 1.1.17 Chảt lừỡng săn phám Chảt lừỡng săn phám phăi ẵt mửc cao nhảt Trong qu trệnh ẵĩng tĂu, cỗ sờ ẵĩng tĂu phăi tiặn hĂnh kièm tra vĂ gim st tì mì tảt că cc cỏng viẻc nhĂ xừờng vĂ ngoĂi triận ẵĂ Lin kặt ca tảt că cc bổ phn kặt cảu thàn tĂu phăi chc chn vĂ hoĂn hăo Mắp tỏn phăi chẽnh xc vĂ hoĂn hăo Gĩc lừỡn phẽa ca mắp b phăi khỏng nhị hỗn hai lÃn nhừng khỏng lốn hỗn ba lÃn chiậu dĂy tảm tỏn Nặu cỗ cảu thừộng ẵi xuyÅn qua vŸch ho´c boong kÏn nõèc, thÖ vŸch v¡ boong ảy phăi cĩ cảu to kẽn nừốc, khỏng ẵừỡc dïng gå ho´c xi m¯ng ½Ì l¡m kÏn Chi tiặt vậ mõi hĂn vĂ chảt lừỡng mõi hĂn phăi thịa mơn cc qui ẵnh PhÃn 1.1.18 Ln ẵĂ Tảt că cc tĂu ẵĩng theo Qui phm nĂy sau thng mĂ chừa xuảt xừờng nn ẵừỡc ½õa lÅn ½¡ ½Ì kiÌm tra 1.1.19 ThiỈt bÙ 19 tcvn 6259 -2A :2003, Chừỗng Cổt cáu, dày chng, thiặt b nàng hĂng, thiặt b chng buổc vĂ thiặt bÙ neo v¡ cŸc trang bÙ, dịng cị khŸc nỈu khỏng ẵừỡc qui ẵnh PhÃn nĂy thệ phăi cĩ bõ trẽ vĂ kặt cảu từỗng ửng phù hỡp vối mũc ẵẽch sứ dũng vĂ viẻc kièm tra phăi ẵừỡc tiỈn h¡nh theo u c·u cða ‡¯ng kiÌm viÅn xắt thảy cÃn thiặt 1.1.20 Chờ dÃu hoc chảt lịng d chy khc Nhựng yu cÃu ẵõi vối kặt cảu thàn tĂu vĂ trang thiặt b ca tĂu chờ dÃu ẵõt PhÃn nĂy chì p dũng cho trừộng hỡp chờ dÃu ẵõt cĩ nhiẻt ẵổ bt chy lốn hỗn 60C (thứ cõc kẽn) Kặt cảu thàn tĂu vĂ trang thiặt b ca tĂu chờ dÃu ẵõt cĩ nhiẻt ẵổ bt chy bng vĂ nhị hỗn 60C (thứ cõc kẽn) phăi thịa mơn nhựng yu cÃu PhÃn nĂy hoc phăi p dũng nhựng qui ẵnh ring Kặt cảu vĂ bõ trẽ ca kắt sàu dùng ẵè chờ dÃu hĂng phăi thịa mơn cc qui ẵnh Chừỗng 27 Khỏng ẵừỡc chờ dÃu hoc cc chảt lịng d chy khc cc kắt nm phÏa trõèc vŸch châng va 1.1.21 BiỴn phŸp kiÌm soŸt n mín Nặu p dũng biẻn php kièm sot n mín ẵơ ẵừỡc duyẻt cho cc kắt, thệ kẽch thừốc cc cỗ cảu ca kắt theo qui ẵnh cĩ thè ẵừỡc giăm ẵi ẵừỡc ng kièm chảp thun õi vối cc tĂu cĩ kẽch thừốc cỗ cảu ẵừỡc giăm theo -1 trn, kỷ hiẻu cảp tĂu s cĩ thm dảu hiẻu CoC 1.1.22 Tẽnh ton trỳc tiặp Khi ẵừỡc ng kièm chảp thun cĩ thè p dũng phừỗng php tẽnh ton trỳc tiặp ẵè xc ẵnh kẽch thừốc ca cỗ cảu chẽnh Trong trừộng hỡp nĂy phăi trệnh cc tĂi liẻu dùng cho tẽnh ton ẵè ng kièm xem xắt Nặu ng kièm thảy cÃn thiặt phăi ẵừa vĂo tẽnh ton kièu vĂ kẽch cở ca tĂu, thệ kẽch thừốc ca cc cỗ cảu chẽnh phăi ẵừỡc xc ẵnh bng phàn tẽch ẵổ bận trỳc tiặp 1.1.23 Cc chi tiặt kặt cảu Phăi câ g°ng trŸnh sú giŸn ½o−n v¡ sú thay ½äi ẵổt ngổt ca tiặt diẻn cỗ cảu Gĩc ca tảt că cc lồ khoắt phăi ẵừỡc lừỡn ẵậu Khi cỗ cảu cửng, chng hn mơ, cĩ diẻn tẽch tiặt diẻn nhị ẵừỡc hĂn vối tỏn từỗng ẵõi mịng thệ ẽt nhảt hai ẵÃu ca cỗ cảu ẵĩ phăi ẵừỡc hĂn trỳc tiặp ln cỗ cảu cửng khc Khi ng kièm thảy cÃn thiặt, phăi tiặn hĂnh ẵnh gi ẵổ bận mịi ẵõi vối cc chi tiặt kặt cảu, nhừ lin kặt ca cc cỗ cảu dc phm vi tữ vch trừốc buóng my ẵặn vch chõng va, xuyn qua cc cỗ cảu ngang thỏng thừộng, cc vŸch ngang, cŸc ½¡ ngang, cŸc th¡nh ph·n sâng liÅn kặt vối tỏn mn hoc vch vĂ cc cỗ cảu khỏng lin tũc v.v nặu cĩ thè thảy trừốc lĂ s b trung ửng suảt Khi viẻc ẵnh gi ẵổ bận mịi theo qui ẵnh -4 ẵừỡc yu cÃu, thệ phăi trệnh cc tĂi liẻu lin quan ẵặn viẻc ẵnh gi cho ng kièm xem xắt 1.2 HĂn 1.2.1 Ph−m vi Ÿp dịng ‡õéng h¡n dïng kỈt cảu thàn tĂu vĂ cc thiặt b quan trng phăi phï hìp vèi cŸc yÅu c·u ê TCVN 62596:2003 -Ph·n HĂn (sau ẵày gi lĂ PhÃn 6)vĂ nhựng yu c·u ê 1.2 cða Ph·n n¡y 20 tcvn 6259 -2A: 2003, Chapter 30 Chapter 30 30.1 CONTAINER CARRIERS General 30.1.1 Application The construction and equipment of ships intended to be registered as "container carrier" are to be in accordance with the requirements in this Chapter Except where specially required in this Chapter, the general requirements for the construction and equipment of steel ships are to be applied The requirements in this Chapter are framed for ships which are single deckers having double bottoms in cargo holds and having decks and bottoms framed longitudinally The container carriers with different construction from that specified in the preceding -3 to which the requirements in this Chapter are not applicable, are to be at the discretion of VR 30.1.2 Direct calculation Where approved by VR, scantlings of structural members may be determined based upon direct calculation Where the scantlings determined basing upon direct calculation exceed the scantlings required in this Chapter, the former is to be adopted Where the direct calculation specified in the preceding -1 is carried out, the data necessary for the calculation are to be submitted to VR 30.2 Longitudinal strength 30.2.1 Bending strength The section modulus of the athwartship section of hull is to be as given in 13.2 However, in case the athwartship section changes greatly in shape, adequate care is to be taken against deflection of the hull 30.2.2 Torsional strength Where the width of hatchway at midship exceeds 0.7B, special considerations are to be paid to the additional stress and the deformation of hatchway openings due to torsion Where, however, the ship has two or more rows of hatchways, the distance between the outermost lines of hatchway openings is to be taken as the width of hatchway 30.3 Double bottom construction 30.3.1 General The construction of double bottoms in holds which are exclusively loaded with containers is to be in accordance with the requirements in 30.3 Side girders or solid floors are to be provided in the double bottoms under corner fittings, or double bottoms are to be constructed so as to effectively support the loads due to containers 30.3.2 Longitudinals The section modulus of bottom longitudinals is not to be less than that obtained from the following formula: 100C (d + 0.026 L' ) Sl 24 − 15.5 f B (cm3) where: 285 tcvn 6259 -2A: 2003, Chapter 30 C: Coefficient given below: In case where no strut specified in 30.3.3 is provided midway between floors: 1.0 In case where a strut specified in 30.3.3 is provided midway between floors: 0.625 Where, however, the width of the vertical stiffeners provided on floors and that of struts are specially large, the coefficient may be properly reduced fB: Ratio of the section modulus of transverse section of hull required in Chapter 13 to the actual section modulus of transverse section of hull at the bottom L’: Length of ship (m) Where, however, L exceeds 230 m, L' is to be taken as 230 m l: Spacing of solid floors (m) S: Spacing of longitudinals (m) The section modulus of inner bottom longitudinals is not to be less than 75% of that specified for the bottom longitudinals at the place 30.3.3 Vertical struts Where vertical struts are provided, the sectional area is not to be less than that obtained from the following formula: 0.9 C S b (d + 0.026 L') (cm2) where: C: Coefficient obtained from the following formula In any case, however, C is not to be less than 1.43 1 − 0.5 ls k where: lS: Length of struts (m) k: Minimum radius of gyration of struts obtained from the following formula (cm): I A I: The least moment of inertia of struts (cm4) A: Sectional area of struts (cm2) S: Spacing of longitudinals (m) b: Width of the area supported by struts (m) 30.3.4 Thickness of inner bottom plating The thickness of inner bottom plating is to be in accordance with the requirement in 4.5.1-1 However, in the application of the second formula in the requirement, h is to be obtained from the following formula: 1.13 ( d - d0 ) where: d0: Height of centre girder (m) The inner bottom plating with which the lower ends of corner fittings of containers are in contact is to be strengthened by means of doubling or by other appropriate means 30.4 Double side construction 30.4.1 General Side construction in holds is to be double hull construction as far as practicable and is to be thoroughly stiffened by providing side transverse girders and side stringers within double hull Double side construction is to be in accordance with the requirements in Chapter 11, unless otherwise specified in 30.4 286 tcvn 6259 -2A: 2003, Chapter 30 Double side shell structures, the interiors of which are used as deep tanks, are to be in accordance with the requirements in Chapter 12 in addition to those in 30.4 Side stringers are to be provided in a proper spacing considering the depth of holds Side transverse girders are to be provided at the location of solid floors in double bottoms The scantlings in case where the width of double side shell changes in bilge parts, are to be at the discretion of VR Where structures effectively supporting deck structures and side shell structures are provided in the midway of holds, the requirements in 30.4 may be appropriately modified The scantlings in case where the height from the designed maximum load line to the strength deck is specially large, are to be at the discretion of VR At the location where the inner hull plating and the inner bottom plating are combined, considerations are to be paid with regard to their structural arrangement so as not to cause stress concentration At the fore and aft ends of double side structure, sufficient considerations are to be paid to the continuity of construction and strength 30.4.2 Side transverse girders and side stringers The thickness of side transverse girders is not to be less than that obtained from the following formulae, whichever is the greatest: t1 = 0.083 t = CSl H (d + 0.038L' ) + 2.5 d1 − a d 12 (t1 − 2.5) + k (mm) (mm) t = 8.5S + 2.5 (mm) where: C: As obtained from the following formula: (C1 + β T C2 )C3 C1 and C2: As obtained from Table 2A/30.1 in accordance with the value of h /lH For intermediate values of h/lH, the values of C1 and C2 are to be determined by linear interpolation h: Vertical distance from the top of inner bottom to the strength deck at side (m) lH: Length of hold (m) Table 2A/30.1 Coefficents C1 and C2 h/lH ≤ 0.5 0.75 1.00 1.25 1.50 ≥ 1.75 C1 C2 0.18 0.05 0.21 0.08 0.24 0.09 0.25 0.10 0.26 0.11 0.27 0.12 βT: As obtained from the following formula: ⎛ B⎞ 0.42⎜ ⎟ − 0.5 ⎜D ⎟ ⎝ s⎠ 1+ d Ds − ⎛ ⎞ 2 ⎜ d ⎟ + 1.0 0.59 B − d1 ⎜ d1 ⎟ ⎝ ⎠ d0: Height of centre girder (m) 287 tcvn 6259 -2A: 2003, Chapter 30 d1: Depth of side transverse girder (m) Where, however, the depth of webs is divided by providing stiffeners in the direction of the length of girder on the webs, d1 in the formulae for t2 and t3 may be taken as the divided depth y h C3: As obtained from the following formula, but not to be less than 0.2: 1− 1.8 S: a: L’: k: y: Distance from the lower end of h to the location under consideration (m) Width of the area supported by the side transverse girders (m) Depth of the openings at the location under consideration (m) Length of ship (m) Where, however, L exceeds 230 m, L' is to be taken as 230 m Coefficient obtained from Table 2A/30.2 in accordance with the ratio of the spacing S1 (m) of the stiffeners provided in the direction of the depth of girder on the web of side transverse girder and d1 For intermediate values of S1/d1, the value of k is to be determined by linear interpolation Coefficent k Table 2A/30.2 S1/d1 ≤ 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.5 ≥ 2.0 k 60.0 40.0 26.8 20.0 16.4 14.4 13.0 12.3 11.1 10.2 S2 = S1 or d1, whichever is smaller The thickness of side stringers is not to be less than that obtained from the following formulae, whichever is the greatest: t1 = 0.083 t = CSl H (d + 0.038L' ) + 2.5 d1 − a d 12 (t1 − 2.5) + k (mm) (mm) t = 8.5S + 2.5 (mm) where: C: As obtained from the following formula: (C1 + β L C2 )C3 C1 and C2: As obtained from Table 2A/30.3, in accordance with the value of h/lH For intermediate values of h/lH, the values of C1 and C2 are to be determined by linear interpolation Table 2A/30.3 Coefficents C1 and C2 h/lH ≤ 0.5 0.75 1.00 1.25 ≥ 1.50 C1 C2 0.20 0.07 0.24 0.05 0.26 0.03 0.26 0.01 0.26 0.00 βT: As obtained from the following formula: ⎛ B⎞ 0.18 ⎜ ⎟ − 0.5 ⎜D ⎟ ⎝ s⎠ 1+ d Ds − ⎛ ⎞2 ⎜ d ⎟ + 1.0 0.59 B − d1 ⎜ d1 ⎟ ⎝ ⎠ lH, h, d0 and L’: As specified in the preceding -1 d1: Depth of side stringers (m) Where, however, the depth of webs is divided by providing stiffeners in the direction of the length of stringer on the webs, d1 in the formulae for t2 and t3 may be taken as the divided depth 288 tcvn 6259 -2A: 2003, Chapter 30 1− C3: As obtained from the following formula: 2x lH x: Distance from the end of to the location under consideration (m) S: Width of the area supported by the side stringers (m) a: Depth of the openings at the location under consideration (m) k: Coefficient obtained from Table 2A/30.2 in accordance with the ratio of the spacing S1 (m) of the stiffeners provided in the direction of the depth of stringer on the web of side stringer and d1 For intermediate values of S1/d1, the value of k is to be determined by linear interpolation S2 = S1 or d1, whichever is smaller 30.4.3 Inner hull construction The thickness of inner hull plating in case where the interior of the double side structure is used as deep water tanks, and the section modulus of longitudinal stiffeners are not to be less than that obtained from the following formulae, respectively: (1) Thickness of inner hull plating: 3.6CS h + 3.0 (mm) where: S: Spacing of stiffeners (m) h: Vertical distance between the middle point of the distance from the tank top plating to the upper end of overflow pipe and the lower edge of inner hull plating (m) However, with respect to the inner hull plating composing a large tank, appropriate additional water pressure is to be taken into account C: Coefficient given in the following according to the stiffening system of inner hull plating: (a) In case of transverse system: 27.7 767 − α where: α: As obtained from the following formulae, whichever is greater: ⎛ y ⎞ 15.5 f B ⎜1 − ⎜ y ⎟ ⎟ B ⎠ ⎝ where y ≤ yB ⎛ y − yB ⎞ 15.5 f D ⎜ ⎟ ⎝ Y' ⎠ where y > yB d1 ⎞ ⎛ k ⎜1 − ⎟ ⎝ B⎠ fB: As specified in 30.3.2-1 y: Vertical distance from the top of keel to the lower edge of inner hull plating (m) yB: Vertical distance from the top of keel to the horizontal neutral axis of transverse section (m) fD: Ratio of the section modulus of transverse section of hull required in Chapter 13 to the actual section modulus of hull at strength deck Y’: The greater of the value specified in 13.2.3 (5)(a) or (b) k: As specified in the following according to the value of L For intermediate values of L, the values of k are to be determined by linear interpolation: Where L is 230 m and under: Where L is 400 m and above: 10.5 289 tcvn 6259 -2A: 2003, Chapter 30 d1: Width of double side shell (m) (b) In case of longitudinal system: 3.72 27.7 − α where: α: As specified in (a) but C is not to be less than 1.0 However, the thickness of inner hull platings which are not in contact with sea water in service conditions may be reduced from this requirements by 0.5 mm (2) Section modulus of longitudinal stiffeners on inner hull plating: CS h l2 (cm3) where: C: As obtained from the following formula: 24 24 − α α: As obtained from the following formulae, whichever is greater: ⎛ y ⎞ 15.5 f B ⎜1 − ⎜ y ⎟ ⎟ B ⎠ ⎝ where y ≤ yB ⎛ y − yB ⎞ 15.5 f D ⎜ ⎟ ⎝ Y' ⎠ where y > yB d1 ⎞ ⎛ k ⎜1 − ⎟ ⎝ B⎠ fB: As specified in 30.3.2-1 y: Vertical distance from the top of keel to the longitudinal stiffener under consideration (m) yB, fD, Y’, k and d1: As specified in (1) S: Spacing of longitudinal stiffeners (m) h: Vertical distance between the middle point of the distance from the tank top plating to the upper end of overflow pipe and the middle point between the stiffeners above and below the longitudinal stiffener under consideration (m) However, with respect to the inner hull plating composing a large tank, appropriate additional pressure is to be taken into account l: Span measured between supports of longitudinal stiffeners (m) 30.4.4 Brackets Brackets are to be provided on the upper and lower corners inside the double side structure, at every frame in case where transversely stiffened and at an appropriate spacing between side transverse girders in case where longitudinally stiffened 30.5 Transverse bulkheads 30.5.1 Construction Transverse bulkheads are to be constructed so as to be sufficiently supported at the location of deck In case where the width of bulkhead is specially large, the upper parts of transverse bulkheads are to be appropriately strengthened by providing box-shaped structures or by other means 30.5.2 Partial bulkheads 290 tcvn 6259 -2A: 2003, Chapter 30 Where non-watertight partial bulkheads are provided in cargo holds, the construction and scantlings are to be made to have sufficient strength and rigidity, considering the size of cargo hold, the depth of bulkheads and so on 30.6 Deck construction 30.6.1 Decks inside the line of deck openings The requirements of decks inside the line of deck openings in connection with bending in the plane of deck are not to be less than that obtained from the following formulae In the calculations of section modulus and moment of inertia, the deck inside the line of deck openings is to be regarded as a web and the hatch end coaming as a flange And, in case of box-shaped or similar constructions or the second term of the formula for the thickness of deck plating is to be taken as 5.0 (1) Thickness of deck plating (including the bottom plate in case of box shaped construction) ⎛ l v2 l c 0.00417C1 ⎜ ⎜ w ⎝ c ⎞ ⎟ + ⎟ ⎠ (mm) where: lv: Distance from the top of inner bottom plating to the bulkhead deck at the centre line of ship (m) lc: Width of hatchway (m) Where, however, two or more rows of hatchway are provided, the width of the widest hatchway is to be taken wc: Width of deck inside the line of deck openings (m) C1: As obtained from Table 2A/30.4 in accordance with the value of α For intermediate values of α, the values of C1 are to be determined by linear interpolation Table 2A/30.4 α C1 C2 Coefficents C1 and C2 ≤ 0.5 1.00 0.50 ≥ 1.50 0.37 0.10 α: As obtained from the following formula: 0,5l c4 Iv Sl v3 I c S: Spacing of vertical webs provided on transverse bulkheads (m) Iv: Moment of inertia of vertical webs provided on transverse bulkheads (cm4) Ic: Moment of inertia of decks inside the line of deck openings (cm4) (2) Section modulus: 1,43C2 lv2 lc2 (cm3) where: C2: As obtained from Table 2A/30.4 in accordance with the value of α For intermediate values of α, the values of C2 are to be determined by linear interpolation α, lv and lc: As specified in (1) 291 tcvn 6259 -2A: 2003, Chapter 30 (3) Moment of inertia: 0.38 l c4 Sl v3 Iv (cm4) where: S, lv, lc and Iv: As specified in (1) 30.6.2 Crossties Where the length of hatchway is large in comparison with the width of hatchway, crossties are to be provided in the hatchway opening in an appropriate spacing Where structures effectively supporting the loads from the side and deck of ship are not provided at the location of crossties in the holds, special considerations are to be paid to the scantlings of crossties 30.6.3 Continuity of thickness of deck plating Consideration is to be paid to the continuity in the thickness of deck plating, and to the avoidance of remarkable difference between the thicknesses inside and outside the line of deck openings 30.7 Container supporting arrangements 30.7.1 General Container supporting arrangements are to be constructed so as to effectively transmit the loads to double bottom structure, side construction and transverse bulkheads The strength of container supporting arrangements is to be sufficient for the loads from the bottom and side of ship and the loads due to containers taken in 292 tcvn 6259 -2A : 2003, Chapter 31 Chapter 31 31.1 DAMAGE CONTROL FOR DRY CARGO VESSELS General 31.1.1 Application The requirements in this Part are applied to the dry cargo vessel of 500 gross tonnage and over which are engaged in international voyage The dry cargo vessels mean the cargo ships except the ships engaged in carrying liquids 31.2 Damage control 31.2.1 Watertight doors For all watertight doors in watertight bulkheads, indicators which indicates whether the doors are opened or closed should be provided on the navigating bridge and operating spaces Electrical installations for watertight doors specified in -1 except waterproof type approved by VR are not to be provided with under freeboard deck 31.2.2 Cargo ports and other similar openings For bow door, stern door or shell door required to be watertight, indicators which indicates whether the doors are opened or closed should be provided on the navigation bridge However, in case where it is to be deemed as appropriate by VR, this requirement may be dispensed with 31.3 Booklet and plan for damage control 31.3.1 Damage control plan Damage control plan approved by VR should be permanently exhibited or readily available on the navigating bridge, for the guidance of the officer in charge of the ship The damage control plan should show clearly for the each deck and hold the boundaries of the watertight compartments, the openings therein with means of closure (including the position of any controls thereof), and the arrangements for the correction of any list due to flooding 31.3.2 Booklet Booklet should contained the information shown in the damage control plan Booklet should be provided a suitable place which is made available to the officers of ships 293 tcvn 6259 -2A: 2003, Chapter 32 Chapter 32 LOADING MANUAL AND LOADING COMPUTER 32.1 General 32.1.1 General application In order to enable the ship master to arrange for the loading of cargo and ballasting to avoid the occurrence of unacceptable stress in the ship’s structure, ships are to be provided with a loading manual approved by VR For ships of length 100 m and above, which fall under following or, a loading computer approved by VR is to be provided (1) Ships conforming to Chapter 27 to Chapter 30 of Part 2A and Part 8D, 8E (2) Other ships deemed necessary by VR 32.1.2 Loading Manual (1) Loading manual is to include the following items at least (a) The loading conditions on which the design of the ship has been based, including permissible limits of longitudinal still water bending moment and still water shearing force (b) Results of calculations of longitudinal still water bending moment and still water shearing force corresponding to the loading conditions (c) Allowable limits of local loads applied to hatch covers, deck, double bottom construction, etc., where deemed necessary by VR 32.1.3 Loading Computer (1) Loading computer is to be capable of readily computing longitudinal still water bending moment and still water shearing force working on the ship corresponding to all the loading conditions of cargo and ballast The computer has the performance and functions as deemed appropriate by VR (2) Loading computer is to be capable of producing the specified performance and functions on installation (3) The operation manual for the computer is available on board 32.2 Additional Requirements for New Bulk Carriers, Ore Carriers and Combination Carriers 32.2.1 General Bulk carriers, ore carriers and combination carriers of 150 m length and above, which are contracted for construction before 1st July 1998 and conforming to Chapter 28 and Chapter 29, are to be in accordance with the requirements of this section In this section, bulk carrier is a ship which is constructed generally with single deck, top-side tanks and hopper side tanks in cargo spaces Ships are to be provided with a loading manual and a loading computer in accordance with the requirements in 32.2.2 and 32.2.3 32.2.2 Loading Manual 294 Loading manual is to include, in addition to the requirements given in 32.1.2, the following items tcvn 6259 -2A: 2003, Chapter 32 (1) For bulk carriers conforming to 29.10.5, envelope results and permissible limits of still bending moments and shear forces in the holds flooded condition according to the requirements given in 29.10.5 (2) The cargo holds or combination of cargo holds that might be empty be at full draught Where no cargo hold is allowable to be empty at full draught, this is to be clearly stated in the loading manual (3) Maximum allowable and minimum required mass of cargo and double bottom contents of each hold as a function of the draught at mid-hold position (4) Maximum and minimum required mass of cargo and double bottom contents of any adjacent two holds as a function of the mean draught This mean draught may be calculated by averaging the draught of the two mid-hold positions (5) Maximum allowable tank top loading together with specification of the nature of cargo for cargoes other than bulk cargoes Where the ship is not approved to carry cargoes other than bulk cargoes, this is to be clearly stated in the loading manual (6) Maximum allowable load on deck and hatch covers Where the ship is not approved to carry load on deck and hatch covers, this is to be clearly stated in the loading manual (7) Maximum rate of ballast change together with the advice that a load plan is to be agreed with the terminal on the basis of the achievable rates of change of ballast (8) Bulk cargo density for strength requirements in accordance with 29.10 It is to be clearly stated in the loading manual as follows, “Where the ship is intended to load cargoes more than the value of such bulk cargo density, the ship should be regarded strength of the hull construction” The latest date for implementation for this requirements in is 1st July 1999 Loading manual is to include, in addition to the requirements given in 32.1.2, the following conditions, subdivided into departure and arrival conditions Where the design of the ship is based on the conditions (1), (4) , to (6) and (8) , these are to be included in the loading manual (1) Alternate light and heavy cargo loading conditions at maximum draught (2) Homogeneous light and heavy cargo loading conditions at maximum draught (3) Ballast conditions For ships having ballast holds adjacent to topside wing, hopper and double bottom tanks, it shall be strengthwise acceptable that the ballast holds are filled when the topside wing, hopper and double bottom tanks are empty (4) Short voyage conditions where the ship is to be loaded to maximum draught but limited amount of bunkers (5) Multiple port loading unloading conditions (6) Deck cargo conditions (7) Typical loading unloading sequences where the ship is loaded from commencement of cargo loading to reaching full deadweight capacity and from commencement of full deadweight capacity to empty conditions Such sequences are to be developed paying attention to loading rate and deballasting capability on Table 2A/32.1 (Form 1) (8) Typical sequences for change of ballast at sea 32.2.3 Loading Computer In addition to the requirements in 32.1.3, the Loading computer is to be capable of ascertaining that the following values are within permissible limits (1) The mass of cargo and double bottom contents in way of each hold as a function of the draught at midhold position 295 tcvn 6259 -2A: 2003, Chapter 32 (2) The mass of cargo and double bottom contents of any two adjacent holds as a function of the mean draught in way of these holds (3) For bulk carriers conforming to 29.10.5, the still water bending moment and shear forces in holds flooded conditions The latest date for implementation for the requirements in is 1st July 1999 32.3 Additional Requirements for Existing Bulk Carriers, Ore Carriers and Combination Carriers 32.3.1 Loading Manual In additional of the requirements in 32.1.2, for single side skin bulk carriers of 150 m length and above, which are contacted for construction before 1st July 1998, the loading manual with typical loading unloading sequences given in 32.2.2-2(7) are to be approved by VR Bulk carriers are to provided with the manual including the sequences before 1st July 1999 In this subparagraph and 32.3.2, bulk carrier is a ship which is constructed generally with single deck, top-side tanks and hopper side tanks in cargo spaces 32.3.2 Loading Computer 296 Bulk carriers, ore carriers and combination carriers of length 150 m and above, conforming to Chapter 28 or Chapter 29, except ships for which the application of classification surveys during construction are submitted to VR on and after 1st January 1994, are to be provided with a loading computer given in 32.1.3 tcvn 6259 -2A: 2003, Chapter 32 Table 2-A/32.1 LOADING/LOADING SEQUENCE SUMMARY FORM (FORM 1) Vessl name Voyage No APT 8 Id Number 9999 4 Yard Class VR Condition 2 FPT Data of Holds Hold No 5 Volume of hold (m3) Height of hold (m) Holds content at commencement of loading/ discharging Cargo mass Density (t/m3) Grade Cargo operations Pour No./ Grade 6 Total cargo on board (t) Remaining cargo to be loaded (t) Draft survey n-1 Draft survey n 297 tcvn 6259 -2A: 2003, Chapter 32 Hold content at end of loading/ discharging (t) Cargo mass Total mass loaded/ discharged (t) Maximum occuring value among all conditions above Net load on double bottom t/ m3 Nets load in two adjacent holds t Port : Condition at comencement of loading/ discharging Total mass of cargo to be loaded/ discharged : Condition at end of loading/ discharging Dock water density (t/m3) : Maximum loading/ discharging rate : Average loading/ discharging rate : Number of loaders/ dischargers : Maximum ballasting/ deballasting rate : Average ballasting/ deballasting rate : Note : During each pour it has to be controlled that allowable limits for hull girder shear force, bending moments and mass in holds are not exceeded loading/ discharging operations may have to be allow for ballasting/ deballasting in order to keep actual values within mimits Ballasting contents at end of loading/ discharging Wings or peaks Upper Lower / Peak 298 AFT Ball No Ball No Ball No Ball No Ball No Ball No Ball No Bt ẵÃu xặp/ dở (bièn) FPT daft (m) Trim (m) dfwd (m) Max S F % B M % tcvn 6259 -2A: 2003, Chapter 32 Ballasting operations Values at end of pour (from habour to sea) Upper lower/ peak APT No No No No No No No B.T B.T B.T B.T B.T B.T FPT daft( m) B.T Trim (m) dfwd (m) Max S F % Upper Lower / Peak B M % Upper Lower / Peak Upper Lower / Peak Total amount of bunkers onboard (t) Upper Lower / Peak Upper Lower / Peak Ballasting contents at end of loading/ discharging Values at end of loading/ discharging (sea) Wings or peaks AFT Ball No Ball No Ball No Ball No Ball No Ball No Ball No FPT daft (m) Trim (m) dfwd (m) Max S F % Upper Lower / Peak B M % (Mh/V)h.d (t/m2) Net load on double bottom : Where: Mh = Mass in hold + Mass Double bottom (t) h - Height of hold from inner bottom to top of coaming (m) V – Total volume of hold (m3), d - Draught (m) Approved by : Date : 299 ... 1,3 T 1,2 W 28 W : 2,2L + 88 T : 0,18L + 15 R : 0,40 L + 16 (mm) (mm) (mm) Trũ chàn vt ca sõng ẵuỏi bng thắp ẵợc tcvn 6259 -2A :2 003, Chừỗng R W : 2,5L + 100 T : 2.2 L +5,0 R : 0,40 L + 16 (mm)... hỗn 0,05B Ă ngang hờ tcvn 6259 -2A :2 003, Chừỗng S : Khoăng cch giựa cc d·m ngang ½Ÿy dõèi (m) h = d + 0,026 L’ L’ : Nhõ qui ½Ùnh ê 4.4.3-1 C : Hẻ sõ ẵừỡc cho nhừ sau : 6,67 : Nặu kháng cÜ châng... thõng ngang 26 tcvn 6259 -2A :2 003, Chừỗng 0,15 l 0,05 l F1 F3 ho´c F4 0,1 l F1 0,1 l l F3 (a) F1 F1 (c) (b) ≥ F2 (d) HƯnh 2A/1.1 Ph·n liÅn tịc cða ½õéng h¡n 27 tcvn 6259 -2A :2 003, Chừỗng Chừỗng