Scaffolding Guide

Standards - Pair of

The main transoms can be fixed directly across to each pair of standards with right-angled couplers. Or, fixed to ledgers using putlog couplers, which must be fixed within 300mm from each pair of standards.

Ledger braces are used to connect the front standards to the rear standards. These are usually placed at each lift and at every other pair of standards.
As free access through the scaffold is often a requirement for other trades working on the site, some ledger braces may have to be removed. The scaffold design engineer will advise on which ledger braces need to be removed and wether additional braces or ties are required elsewhere. Braces form the integral part of the scaffold structure and must not be removed without proper authorisation.

Cross braces and ledger braces are vital to the rigidity of the scaffold structure. They are placed diagonally across the ledgers and adjacent to alternate pairs of standards.
The differences are, cross braces are usually fixed directly to the standards, whilst ledger braces are fixed to ledgers.

The main transoms are installed horizontally across the ledgers at right angles adjacent to each pair of standards. In some cases they maybe connected to each pair of standards. The purpose of the main transoms is to hold both rows of standards in position making the scaffold more ridged. They also act as a support for scaffold boards. Main transoms are usually installed in the direction of the smaller dimension of the scaffold.
Intermediate transoms are installed in between the main transoms acting as supports, sometime referred to as 'board bearers'.

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