Timber frame structures

Fire risks for all timber frame projects must be assessed by a competent person, considering both onsite and offsite risks.

Independent risk assessors should be employed for complex projects, and minimum controls must include CCTV, automated heat detection, and regular fire risk assessments.

Compliance with the Structural Timber Association’s 16 Steps to Fire Safety and the Fire Prevention on Construction Sites JCoP is mandatory.

Ensure early installation of final cladding, avoid generators in exposed timber structures, and store flammable materials safely.

Install automated heat detection, linked to the fire alarm system, horizontally on the landing of every timber frame plot (max. 9m above ground level) attached to the roof timbers/trusses until final cladding is installed. It is recommended detectors are positioned in the loft hatch area to avoid moving during boarding. Use a weatherproof cover if installed before the plot is weatherproof.

For large structures, consider non-combustible ground floors, pressurised fire protection treatments, and early compartmentalisation and firestopping. Temporary buildings are not allowed within large timber frame structures.