By C. J. Wilshire
This consultant examines the functions of falsework in tasks of all sizes utilizing diversified fabrics. After giving attention to layout innovations and conventional ideas, the ebook concludes with a list to assist the reader look for power faults
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ACKNOWLEDGEMENTS The Author is grateful for the assistance of many friends in the industry, without whom this Guide would not have been written. In particular, the following companies a n d organiza tions have granted permission for the reproduction of photographs or diagrams: Acrow (Engineers) Limited (Fig. 7) Construction Industry Research & Development Association (Fig. 8 ) Institution of Civil Engineers (Fig. 1) J o h n Laing Design Associates Limited (Figs 3 , 4 , 15, 16, 17 and 19) Kwikform Limited (Figs 9 a n d 10) Mabey Bridge C o m p a n y Limited (Fig.
1 Brief It is important to check that the conditions of use of the falsework are those envisaged at the design stage and that nothing has changed for the worse. Are foundations as secure as expected? Are there any unforeseen loads? Have concreting methods changed? Is the order of loading the same? There may be a considerable period between design and execution. Drawings The erected falsework should be checked against the final design given in the latest edition of the drawing and any supporting paperwork such as a method statement.
All overhangs should be kept short. Beams are likely to be laterally unstable if their height-to-base ratio exceeds two to one. Additional sup port is required. If they have to be canted, lateral stability demands particularly careful attention. IT E L E V A T I O N O N B-B PLAN A-J Fig. 17. Arrangement of bracing in a scaffold (broken line indicates bracing) 30 birdcage Where beams cross each other in different planes, it may be practical to use tapered packs to provide the load path. Bearing stress requires careful consideration.