Concrete Formwork Svstems - Part 7 docx

... 1050 870 75 0 664 600 550 510 5 1 275 1050 900 79 3 71 2 650 600 6 1500 1230 1050 921 825 75 0 690 7 172 5 1410 1200 1050 933 850 78 0 8 179 3 1466 1246 1090 972 877 808 9 1865 1522 1293 1130 10 07 912 836 10 ... procedure, we get l d ϭ 37. 70 67 F cE ϭ 3 37. 6014 psi C P ϭ 0.0 378 4 ⇒ F′ c ϭ 922. 275 4 psi Allowable P is 922. 275 4 ϫ (4.5) 2 ϭ 18 676 . 07 lb. and spacing be- tween...

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... and self- raising forms. Formwork systems for vertical concrete work can be classi- fied into two main categories, namely, crane-dependent systems and crane-independent systems. Gang formwork ... aesthetically pleasing concrete finish is always of prime impor- tance in architectural concrete construction such as walls and col- Vertical Formwork Systems: Crane-Dependent Systems 171...

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... 2) Includes index. ISBN 0-8 24 7- 0 07 2-4 (alk. paper) 1. Concrete construction Formwork. I. Title. II. Series. TA382.44.H36 1998 624.1′834—dc21 9 8-3 72 62 CIP This book is printed on acid-free paper. Headquarters Marcel ... Reserved. Contents Preface Acknowledgments 1 Concrete Formwork: An Introduction 1.1 Concrete Construction 1.2 Concrete Formwork 1.3 Formwork Econo...

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... 256 Appendix Appendix 2 57

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... problem 1 Concrete Formwork: An Introduction 1.1 Concrete Construction 1.2 Concrete Formwork 1.3 Formwork Economy and Significance 1.4 An Integrated Concrete/ Formwork Life Cycle 1.5 Formwork Materials Concrete ... construction of a concrete building requires formwork to sup- port the slabs (horizontal formwork) as well as columns and walls (vertical formwork) . The ter...

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... are based on 2-ft (0.61-m), 3-ft (0.91-m), 4-ft (1.22-m), and Horizontal Formwork Systems: Hand-Set Systems 37 Exterior plywood is used for sheathing because it is made of water- proof glue that ... 1 27 mm). Pans are usually Horizontal Formwork Systems: Hand-Set Systems 43 5-ft (1.52-m) modules. The 2-ft (0.61-m) size modules utilize 19 ϫ 19 in. (482.6 ϫ 482.6 mm) domes, with 5-in. (1...

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... 1-1 /2 1-9 /16 1-1 /4 1 1-1 /32 3 2-1 /2 2-9 /16 1-1 /2 1-1 /4 1-9 /32 4 3-1 /2 3-9 /16 5 4-1 /2 4-5 /8 6 5-1 /2 5-5 /8 7 6-1 /2 6-5 /8 8 7- 1 /4 7- 1 /2 9 8-1 /4 8-1 /2 10 9-1 /4 9-1 /2 11 1 0-1 /4 1 0-1 /2 12 1 1-1 /4 1 1-1 /2 14 ... 1 3-1 /4 1 3-1 /2 16 1 5-1 /4 1 5-1 /2 Dimension 2 1-1 /2 1-9 /16 2 1-1 /2 1-9 /16 Lumb...

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... COLUMN-MOUNTED SHORING SYSTEMS Column-mounted shoring system is the term used for formwork pan- els supported by an up-and-down adjustable bracket jack system attached to already-cast concrete ... conventional construc- tion method is to build formwork and place concrete for columns, then strip formwork for concrete columns after 12 to 24 hours. Erection of formwork and placing...

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... area One 1.00 10 .76 Two 0.62 6. 67 Three 0.5 5.38 Four 0.44 4 .74 Five 0.4 4.31 Six 0. 37 3.98 Seven 0.36 3.88 Eight 0.35 3 .77 Nine 0.33 3.55 Ten 0.32 3.44 In deciding to use a specific formwork system, ... accurately select the opti- mum formwork system for the job. 5.1 FACTORS AFFECTING HORIZONTAL FORMWORK SELECTION Selecting the formwork system for cast-in-place reinforced co...

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... jacks. Slipform jacks come in a variety of capacities, 3-ton (2 . 7- Mg), 6-ton (5.4-Mg), 15-ton (13.6-Mg), 20-ton (18.1-Mg), and 22-ton (20.0-Mg). Jacks are placed so they carry approximately the ... of concrete. Honey- combs in concrete are a result of poor vibration effort. Temperature and Concrete Mix Ambient temperature, speed of slipforming raise, and the condi- tions under which t...

Ngày tải lên: 08/08/2014, 10:22