Erection, alteration and dismantling procedures for truss-out scaffolds on building facades
Erection, alteration and dismantling procedures is the domain that tests sequence, stability and control when a truss-out scaffold is built on a live facade.
Planning and sequence
Before work starts, confirm the design, bracket spacing, anchor type and setting, tie-back positions, platform levels, access and exclusion zones. Erect from a safe interior position or a properly designed platform, not by leaning out of a window. Install and test anchors first, then brackets, then the platform, guardrails, toe boards and mesh. Keep the scaffold stable at every stage; never leave a cantilever unbraced or a tie-back disconnected.
Alteration
Any change to bracket spacing, platform width, loading, mesh area or tie-back layout is a design change until proven otherwise. Stop, refer to the competent person and designer, and re-inspect before use. Other trades must not cut ties, hang pipes, remove boards or stack materials without authorisation.
Dismantling
Dismantle in reverse order, top-down, keeping the remaining structure stable. Lower components by rope, gin wheel or controlled means; do not drop tubes, boards or couplers. Maintain the exclusion zone and public protection until the last component is removed. Remove anchors or make them safe so they do not become a projection hazard.
Worked example
A three-storey truss-out is being removed after external repairs. The team wants to cut the top tie-back first because it is easiest to reach. Correct sequence: clear the platform, remove mesh and toe boards, remove the upper platform boards, then release the tie-back only when the bracket is otherwise stable or supported; work downward, lowering parts. Cutting the tie-back first creates an uncontrolled cantilever.
Traps
Do not erect a platform before anchors are set and checked. Do not use the scaffold itself as the only anchor for a safety lanyard. Do not dismantle from the bottom up, and do not leave partially dismantled scaffolds untagged overnight.