Falsework by C. J. Wilshire
By C. J. Wilshire
This advisor examines the purposes of falsework in tasks of all sizes utilizing different fabrics. After giving attention to layout ideas and conventional strategies, the booklet concludes with a record to aid the reader look for capability faults
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British Standards Institution, L o n d o n . T o be published. 13. BRITISH S T A N D A R D S I N S T I T U T I O N . Methods test for falsework equipment. Prefabricated heavy duty support systems—methods of measurement and assess ment of performance. British Standards Institution, L o n d o n , DD89. T o be published. 14. H A T H R E L L J. ) Bailey and Uniflote handbook. Acrow Press, L o n d o n , 1975. 15. B R I T I S H S T A N D A R D S I N S T I T U T I O N . The use of structural steel in building.
Should the vertical member be out of plumb by design, the appropriate calculations should be made. In no case should the total horizontal design force be less than 2 j % of the vertical load. Concrete pressures may exert a force on the falsework, but in general it is only dead weight of concrete which needs to be considered. However, formwork must always be designed to restrain the concrete pressure. The forces between the opposing sides are transmitted via the formwork underneath and may impose lateral forces on the falsework.
This means that it has no tension capacity and friction has to be relied on in a transverse direction. It will only be in the direct compression direction that the strength is clear-cut. The Falsework C o d e provides some information on coefficients of friction. Unless it is completely certain that vibration will not result in movement, an alternative load path should be provided, even though the coefficient of friction is theoretically adequate. The ultimate support of the falsework is often funda mental in deciding the concept.