Monday, March 17, 2014

Determination of Temporary Support Members - Buildings

Temporary Support Determination ~ the basic sizing of most temporary supports follows the principles of elementary structural design. Readers with this basic knowledge should be able to calculate such support members which are required, particularly those used in the context of the maintenance and adaptation of buildings such as a dead shoring system.

 Stability check using the example from previous page ~

The grade stress and slenderness ratios are used to provide a modification factor (K12) for the compression parallel to the grain. The following table shows some factors adapted from BS 5268-2:

By interpolation, a grade stress of 867 and a slenderness ratio of 20 indicates that 7.5N/mm2 is multiplied by 0.57.

Ref. BS 5268-2: Structural use of timber. Code of practice for permissible stress design, materials and workmanship.

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