Method Statement of Slab on grade

CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation METHOD STATEMENT SMC Manufacturing (Viet nam) Factory-Phase Project RC SLAB ON GRADE FACTORY Ref No: SMC-ACS-MS-01-CCW-004 Rev 02 ACSC- CONG TY CO PHAN XAY LAP THUONG MAI SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Revision History Revision 01 02 Date of issue 02/12/2015 30/12/2015 Purpose of issue (approved/ revision) For Review Revised as per KOA comments Submitted by ACSC Prepared by Reviewed by Approved by Name Lê Long Hậu Nguyễn Hoàng Trinh Nguyễn Văn Trung Position Deputy Site Manager Site Manager Project Manager Date Signature Approved by KOA Checked by QA-QC QA-QC HSE KDA Position Date Signature Date Signature Reviewed by Approved by Approved by Client Name Prepared by Reviewed by SMC-Factory No.1/MS-Slab On Grade Position Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Contents SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation INTRODUCTION 1.1 GENERAL This document describes the procedures and method for carrying out the construction works for Slab on Grade of building factory No.1 This method statement will be applied after completion of the RC structures such as foundations, ground beams, columns and the works of soil stabilization and lean concrete on the ground The constructions of those work items were carried out by previous stage; therefore they will no longer discuss in this method statement 1.2 DEFINITIONS: PROJECT PARTICULARS: Project name : SMC MANUFACTURING (VIET NAM) FACTORY-PHASE PROJECT Address : Long Duc Industrial Park, Long Duc Ward, Long Thanh District, Dong Nai Province, Viet Nam PARTY: Client/ Owner : SMC MANUFACTURING VIETNAM CO., LTD Contractor : KAJIMA OVERSEAS ASEA PTE LTD Responsible for the supervision of Contractors who will construct the podium and all related activities as outlined in this procedure SCOPE OF WORK The works to be carried out by Sub-Contractor (ACSC) and shall apply for works at Factory No.1 of SMC MANUFACTURING (VIET NAM) FACTORY- PHASE PROJECT Construction Reinforcement Concrete Structure works included: a Pile head treatment b Earth work c Formwork d Reinforcement Steel Rebar work e Concrete work Finishing works included: a Brick work b Plaster work c Painting work d Tiling work (Wall & Floor) BUILDING DESCRIPTION: Location: Factory No.1 are located at the corner of Road No.D5 &N2-5 in Long Duc Industrial park as below SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation Factory No Description: • • • • Building purpose : Factory Foundation : Spun piles (D300, 350, 400 mm) Structure : RC structures + steel rafter; Slab on grade Dimensions: o Factory  140m long (14x10m); 60 (4x15m) - 69m wide  Ground Floor (FL 0.00m); 1st Floor (FL +7.25m)  Height : 11.40m o Utilities area: x (120m long, 4.5m wide) SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation GROUND FLOOR PLAN • Floor load: o Factory Ground Floor o WC Ground Floor o Stair case o Storage/Utilities • Slab thickness: o Factory Ground floor slab : 300 mm thk o Storage/Utilities Ground Floor slab : 150 mm thk o 1st Floor slab : 140 mm thk • Area: o o : 40 KN/m2 : KN/m2 : KN/m2 : 10 KN/m2 Ground floor + Factory area + Storage/Utilities area 1st Floor SMC-Factory No.1/MS-Slab On Grade : 9561 m2 : 8400 m2 : 1161 m2 : 9561 m2 Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation COR RID OR Z INC ROOF SHEET C OR RI D O R Z IN C R OO F S H E E T 9500 4800 800 T O BEAM G FL+11.900 650 F A C T O R Y -02 1FL G FL+7.250 250 C O N NE C T IO N C O R RI DO R 11600 LOA DING B AY T R.B EAM G FL+13.650 750 1/ 1/ 20 S TE EL K ICK ER CAN OP Y; S TE EL B EAM 3650 G UTTER DOW N SPOUT GFL G FL±0 G UA RD P OS T ( 100?, H=1500) 4500 5000 15000 5000 15000 4500 2000 60000 SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation TYPICAL CROSS SECTION SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation ORGANIZATION CHART 3.1 Organization Chart (Factory No.1) Project Manager NGUYỄN VĂN TRUNG (MP: 090 330 7742) nguyenvantrung@acsc.com.vn Site Manager NGUYỄN HOÀNG TRINH (MP: 090 2911235) nghoangtrinh@acsc.com.vn Deputy Site Manager Deputy Site Manager NGUYỄN TRÍ KHOA (MP: 0937 229 680) LÊ LONG HẬU (MP: 093 734 3055) ngtrikhoa@acsc.com.vn haull@acsc.com.vn Site Engineers QA&QC Nguyễn Minh Tuấn (MP: 098 314 5069) Phan Quốc Trường (MP: 0906 027 797) Nguyễn Văn Hào (MP: 0938.722.730) quoctruong@acsc.com.vn Shop Drawings Safety Supervisors Hoàng Văn Hải (MP:908 818 1059) Đỗ Vũ Quyền Anh (MP:090 853 1908) Construction teams Phương Phương Việt Company SMC-Factory No.1/MS-Slab On Grade Page CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 3.2 Assignment Position Deputy Site manager Site Engineer QA&QC Engineer Safety Supervision Factory No.1 NGUYỄN TRÍ KHOA Factory No.9 TRẦN AN TOÀN NGUYỄN MINH TUẤN NGUYỄN VĂN HÀO PHAN QUỐC TRƯỜNG ĐỖ VŨ QUYỀN ANH LÊ VĂN TUẤT BÙI CÔNG HUYNH BÙI THANH HẢI PHẠM VĂN MẠNH SCHEDULE Construction Schedule of 1FL beams/slab is attached in Appendix-2 SPECIFIC STANDARD Reinforced Concrete Beams/slab shall be carried out in accordance with the requirements of: • • • SMC MANUFACTURING (VIET NAM) FACTORY-PHASE PROJECT Specification for beam/slab works Current Vietnamese Construction Standards + TCVN 5593 : 1991 Vietnamese standard 5593-1991 (Building engineering work - Permissible tolerances in geometry) + TCVN 1651-2008 Vietnamese standard 1651-2008 ( Steel for the reinforcement concrete, part1+2) + TCVN 4453 – 1995 Vietnamese standard 4453-1995 (Concrete structures- codes for construction, check and acceptance) + TCXDVN 371 - 2006 Vietnamese standard 371-2006 (Acceptance of constructional quality of building works) Related Materials approved by KAJIMA & Owner SMC-Factory No.1/MS-Slab On Grade Page 10 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation CONSTRUCTION METHOD 9.1 Casting schedule: The casting concrete of Slab On Grade will be divided into two zones: Zone Zone Zone - Zone 1: This zone enclosed by the perimeter ground beams of grids A, E, 1, 15 (approximate 8400 m 2) In this zone, the slab is 300 mm thk., and finished level is mostly GL +0.00m Most of concrete work of Slab on Grade is in this zone To ensure the quality of concrete work and finishing, the casting in this zone will be divided into 15 stages on each area 30m long x 20 m wide as illustrated above In each stage, the concrete slab will be done following the sequence:  1st : Casting of Isolation blocks around the related columns  2nd: Casting the Slab Isolation Slab (1st cast) Slab on grade (2nd cast)Slab (1st cast) SMC-Factory No.1/MS-Slab On Grade Page 14 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation - Zone 2: This zone enclosed by the ground beams on grids A-A1 and E-E1 (approximate 1080 m 2) The thickness, finished level, slope of each slab area in this zone varies depended on their designs The casting concrete in this zone will be done one by one to facilitate the quality control See details in the attached schedule 9.2 Jointing: There are the joints on the Slab On Grade classified as below: a Control joints The control joints are designed at intervals 5.0 x 7.5m on the locations of gridlines and right on the middle of them as typically shown below: Gridlines Control joints Isolation Joints Depend on the thickness of slabs, there are the typical control joints as below: SMC-Factory No.1/MS-Slab On Grade Page 15 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation The control joints are formed by using cutting machine to cut on the slab day after finishing concrete work The lines to cut are marked on the slab with the support of theodolite The cut line will be 5mm wide and 50 or 70mm deep depend on the thickness of the slabs b Construction joints: The construction joints will be located at the same location of controls joints so they will be treated by cutting in the same way of control joints The construction joints will be formed by using formwork to separate each cast Formwork will be made of rigid steel box with their top levels the same as floor finished level The top level of formwork is fixed by welding the steel boxes to the steel bars, which embedded securely into bedding concrete SMC-Factory No.1/MS-Slab On Grade Page 16 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation c Isolation joints: There are two applications of isolation joints: - Isolation joints along the ground beams SMC-Factory No.1/MS-Slab On Grade Page 17 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation - Isolation joints around the columns The isolation joints are formed by placing the Styrofoam (Extruded Polystyrene Foam) sheet 15mm thk before casting concrete After the slabs completed, a groove will be made on top by removing styrofoam 15mm deep and replacing it with sealant such as Sikaflex SMC-Factory No.1/MS-Slab On Grade Page 18 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 9.3 PVC sheets The PVC sheets will be installed on the bedding concrete before the installation of reinforcement with the thickness designed as below: - PVC sheet 0.15mm : For all areas of Slab on Grade, except storage areas PVC sheet 0.30mm: For the storage areas as shown below: 9.4 Steel work • • Steel reinforcement works mostly are wire mesh The meshes will be placed in compliance with the designed layout and ensure the lap length The spacer blocks 5cm thk will be placed at interval 800x800 (mm) under bottom layer The bar chairs will also be placed with spacing 800x800 (mm) to support the top layer to the right position and concrete cover At Construction joints, the smooth dowel bars D12 will be installed at spacing 500 mm as shown below before 1st casting The dowel bars will be support to right position with the D10 underneath, which are supported by bar chairs D10@600 SMC-Factory No.1/MS-Slab On Grade Page 19 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation • After finishing 1st cast, the exposed half of steel rebars will be painted to allow their movement later Around the columns, reinforced rebar will be installed followed the design, typically as shown below: 9.5 Built-in steel angle: As designed, the galvanize steel angles 5x50x50 mm will be installed for the shutter doors There are 40 pieces, 4.05 m long to be installed at 17 positions before casting concrete These galvanized angles will be manufactured, galvanized and delivered to site before installation SMC-Factory No.1/MS-Slab On Grade Page 20 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation After placing in the right positions, levels, their fish-nail rebar will be stick weld to the starter bars, which extruded from the ground beams, to prevent any displacement during concreting work 9.6 Concrete work a Construction joint: The construction joints will be determined as mentioned above After finishing each cast, the formwork at construction joint will be removed All rubbish, laitance and loose materials must be cleaned before any next installation of wire mesh Before next casting, the construction joints will be cut to straighten the edge • d Supply and placement of concrete: Concrete will be transported from batching plant to site by mixer truck, the slump of concrete Ensure concrete will be • Ready mixed concrete from mixer truck will be then discharge to concrete pump which is set-up • must be within 12 ± 2.0 (cm), initial setting time: to hours delivered in uniform and continuous supply for each concrete pouring The interval for Slump test is to be done for each truck is to be on time to ensure a continuous flow of concrete every truck near the construction area The concrete for Slab on Grade will be pumped to place from the far to the near corners of slab SMC-Factory No.1/MS-Slab On Grade Page 21 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation e Vibrating concrete: During concrete discharge, wet concrete shall be vibrated with a poker vibrator especially at edges or beam area The vibrator shall be inserted vertically into the concrete f Floor finishing Floor finishing consists of Five major steps: - Striking-off Flatness Enhancement Application of floor hardener Floating (power trowel) Trowelling to Dense Smooth Finish Striking-off: Also known as screeding by using screed vibrator on the installed rails, is the process of leveling the fresh concrete It takes place immediately after the placing and compacting operations It is important to have good accuracy in striking to achieve floors flatness and levelness Concrete finishing level will be permanently controlled by rails installed along casting direction Using spreading vibrator and straight bar to spread and level the concrete SMC-Factory No.1/MS-Slab On Grade Page 22 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation The rails are made from D20 steel pipes placed on top of the adjusting support D10 The rails are placed along sides of each cast area at interval 3.7m to suit with length of screeding vibrator These supports will be fixed to bedding concrete by drilling at spacing 0.8m Flatness enhancement: The flatness of the floor is further enhances by flat floor tools and equipment These equipment includes straight bars, hand trowel and bump cutter g Application of hardeners: Spread evenly floor hardener on semi-hardened concrete Divide the floor areas into grids and ensure that appropriate amount of floor hardener is applied evenly onto each area Ensure the workers use appropriate foot ware or platform so not to leave shoes mark on the concrete surface The hardener product will be spread on surface of concrete in compliance with required dosage of 4kg/m The hardener will be applied by hand two times with the sequence below: i Screeding and fill floating (bull floating) shall take place before the emergence of bleed water ii After excess bleed water has evaporated or has been removed, but leaving sufficient moisture at the surface to hydrate cement binders in the floor hardener, evenly distribute approximately 2/3 of the hardener specified for the area When workmen spread the hardener by hand, a sidearm motion at a low angle to the surface is correct In no event should the hardener be applied from distances greater than 3-4 meters If the hardener breaks through the surface when being applied, the concrete is too plastic for product application Delay application until surface stiffens slightly iii When the applied material darkens slightly from absorbed moisture, it should be floated, using hand wooden floats and/or power trowels with kickoff float shoes (do not use combination float and SMC-Factory No.1/MS-Slab On Grade Page 23 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation trowel blades) Care should be taken not to tear through the surface of the hardener to the underlying concrete Delay applying more hardener until moisture from the underlying concrete has been worked completely through the hardener iv Immediately apply the remaining 1/3 of the specified amount of hardener The moisture from the underlying concrete must be completely worked through the hardener If this does not occur, the floor surface will delaminate h Trowelling: Float by using power trowel machine to get smooth surface After the concrete has further stiffened, it should be machine or hand troweled to a blemish free finish Care should be taken not to trowel-burn the surface i Curing: Immediately after final troweling the slab will be cured To prevent surface delamination, wet curing should not begin until 24 hours after the final troweling During interim 24 hour period, cover concrete with plastic sheets to prevent rapid evaporation of surface moisture The concrete will be cured with water during days 9.7 Protection against Damage The concrete sla b shall be protected from damage due to load overstress, heavy shock and excessive vibration, surrounding the concrete area particularly during curing period Construction load shall not be placed on newly completed floor Traffic should be kept off the finished floor for days or longer to avoid surface damages and scratch marking All finish concrete surface shall be protected from damage by construction equipment, materials or other heavy tools with the rubber sheets at the locations where the other construction work to be executed, such as brick work or plaster work SMC-Factory No.1/MS-Slab On Grade Page 24 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 10 TOOL & EQUIPMENT The equipment to be used for the construction of s is listed below Item Unit Q’ty ea nos Nos 2 Hammer machine Nos Walk behind trowel machine Ride on trowel machine Portable steel cutter nos nos Nos Straightening machine Nos 2 Cutting machine Welding machine Bending machine Hack-sawing machine Screwdriver /Drilling machine Level machine Theodolite Nos Nos Nos Nos Nos Nos Nos Concrete pump Spreading vibrator, L=4.0m Concrete Vibrator Description Boom 45m long Gasoline 1 Remarks Pumping concrete Vibrate concrete For roughening concrete surface Surface finishing Surface finishing For cutting steel bar Use for reinforcing steel work Diameter 10mm : SD390, B15-B35 c/ Form work: • • Plywood, 18mm thk reinforced with steel boxes 40 x 80 x 2.0 (mm) Styrofoam: 2.0 cm thk d/ Chemical: • SIKAFLEX Construction SMC-Factory No.1/MS-Slab On Grade Page 25 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 11.2 Materials handling, storage and delivery • Concrete: Ready- mixed concretes are transported from batching plant to site in concrete truck (6 to 12 m3 capacity) The concrete must be delivered to site within maximum 60 minutes depend on the mix design of concrete supplier • Formwork: Formwork will be pre-fabricated then stocked on yard with protection of plastic cover Before installing, the formwork will be transported to site and placed near the excavation The surface of formwork must be clean of dirt, loose concrete and to be applied the release agent, if needed • Steel rebar: Delivered reinforcement bars are to be stored in stockyard nearby fabrication shop for convenient moving to the shop for cutting and bending Fabricated bars will be separately stored in the next area in the fabrication yard with tagged bundles to avoiding steel scraps mix-up Steel bars are stored on the steel platform or concrete blocks to prevent the contact of steel rebar with the ground All steel rebar are stocked in the steel yard with roofing and cover with plastic sheet to protect them with rain water Unloading reinforcement from trailer by a suitable crane for lifting up reinforcement bundles Prior to fabrication of reinforcement, samples shall be taken from each batch of each size of each delivery and tested for compliance in accordance with Quality Control procedures • Other materials are keeping in storage and they are transported to the site work when they are in used 12 QUALITY CONTROL With regards to the quality control, all works shall be carried out following the established Project Quality Control Plan • Installation of form work + Check by leveling machine, tape + Check tightness of formwork by visual + Check rigidity and stability of bracing • Installation of rebar + Checking material: certificate, check dimension by caliper, take the sample for checking physical-mechanical + Check the length, number, position, anchor length, joint by visual and ruler + Thickness of protection: checking by tape + Lap length: Rebar SD390 Ribbed bar: 40d (tensile), 15d (compressive) SMC-Factory No.1/MS-Slab On Grade Page 26 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation • • Finishing concrete surface: - Install rails for leveling the concrete to make sure the right finished level - Before trowelling, using bump cutter to flatten the concrete surface in cutting high spots and filling low spots - Making the first pass with pans in one direction then change direction by 90 o to create flatter floor Application of hardener: - Hardener will be divided into small quantities for each area The hardener material will be spread on each area by area to make sure the uniform density - Each area will be temporary marked on their boundaries with hardener then filled until reach to designed density SMC-Factory No.1/MS-Slab On Grade Page 27 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI Architects & Construction Service Corporation 13 RISK ASSESSMENT See attached Appendix No.4 14 SAFETY Safety check sheet is attached in Appendix No.5 15 APPENDIX Appendix-1: Construction Method Drawings Appendix-2: Construction Schedule Appendix 3: ITP for related works Appendix 4: Risk assessment Appendix 5: Safety check sheet Appendix 6: Catalog of screed vibrator END SMC-Factory No.1/MS-Slab On Grade Page 28 [...]... liter Concrete work + Cover the RC structures can be affected during casting concrete + Prepare the location for concrete pump + Order the concrete SMC-Factory No.1/MS -Slab On Grade Page 13 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation 9 CONSTRUCTION METHOD 9.1 Casting schedule: The casting concrete of Slab On Grade will be divided into two zones: Zone 2 Zone 1 Zone... stage, the concrete slab will be done following the sequence:  1st : Casting of Isolation blocks around the related columns  2nd: Casting the Slab Isolation Slab (1st cast) Slab on grade (2nd cast )Slab (1st cast) SMC-Factory No.1/MS -Slab On Grade Page 14 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation - Zone 2: This zone enclosed by the ground beams on grids A-A1... slope of each slab area in this zone varies depended on their designs The casting concrete in this zone will be done one by one to facilitate the quality control See details in the attached schedule 9.2 Jointing: There are the joints on the Slab On Grade classified as below: a Control joints The control joints are designed at intervals 5.0 x 7.5m on the locations of gridlines and right on the middle of. .. work sequence of construction the Slab on grade is shown at the following flow chart Soil stabilization Previous stage Casting lean concrete of ground slab Surface preparation Formwork fabrication Installation formwork Laying PVC sheets Installing wire mesh Rebar fabrication Installing reinforcement Casting concrete Surface Finishing Cutting joints Curing concrete SMC-Factory No.1/MS -Slab On Grade Page... Gridlines Control joints Isolation Joints Depend on the thickness of slabs, there are the typical control joints as below: SMC-Factory No.1/MS -Slab On Grade Page 15 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation The control joints are formed by using cutting machine to cut on the slab 1 day after finishing concrete work The lines to cut are marked on the slab with... Zone 2 Zone 1 Zone 2 - Zone 1: This zone enclosed by the perimeter ground beams of grids A, E, 1, 15 (approximate 8400 m 2) In this zone, the slab is 300 mm thk., and finished level is mostly GL +0.00m Most of concrete work of Slab on Grade is in this zone To ensure the quality of concrete work and finishing, the casting in this zone will be divided into 15 stages on each area 30m long x 20 m wide as illustrated... The top level of formwork is fixed by welding the steel boxes to the steel bars, which embedded securely into bedding concrete SMC-Factory No.1/MS -Slab On Grade Page 16 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation c Isolation joints: There are two applications of isolation joints: - Isolation joints along the ground beams SMC-Factory No.1/MS -Slab On Grade Page 17... with the support of theodolite The cut line will be 5mm wide and 50 or 70mm deep depend on the thickness of the slabs b Construction joints: The construction joints will be located at the same location of controls joints so they will be treated by cutting in the same way of control joints The construction joints will be formed by using formwork to separate each cast Formwork will be made of rigid steel... continuous flow of concrete every truck near the construction area The concrete for Slab on Grade will be pumped to place from the far to the near corners of slab SMC-Factory No.1/MS -Slab On Grade Page 21 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation e Vibrating concrete: During concrete discharge, wet concrete shall be vibrated with a poker vibrator especially at edges... before installation SMC-Factory No.1/MS -Slab On Grade Page 20 CÔNG TY CỔ PHẦN XÂY LẮP THƯƠNG MẠI 2 Architects & Construction Service Corporation After placing in the right positions, levels, their fish-nail rebar will be stick weld to the starter bars, which extruded from the ground beams, to prevent any displacement during concreting work 9.6 Concrete work a Construction joint: The construction joints will