Roof Truss Installation Checklist When installing your roof trusses use the following checklist to ensure a quality job and to avoid overlooking any critical aspects.   Supporting Structure Check that all top plates that support trusses are level and straight (Any misalignment here will result in a crooked roof) Check that the distance between supporting walls match the spans of the trusses Are the tops of the internal non-load bearing walls set down below that of external load bearing walls? Are lintels in load bearing walls suitable for truss loading? Is the supporting structure fully braced, plumb and stable? Roof Trusses Have trusses been stored and lifted in accordance with these instructions? Are trusses free of any modifications, cut members or broken members? Does the truss design criteria on the documentation conform to the job specification for roof cladding and special loads, eg roof mounted hot water tanks, air conditioners, etc? Are trusses correctly positioned according to truss layout plan? Are trusses accurately spaced? Have cantilever or internally supported trusses been orientated correctly i.e. are “Support Here” stickers located above bearing walls? Are trusses installed within installation tolerances? (a) Plumb  – All sections of truss less than 50mm or height/50 out of vertical (b) Bow    – All chord bows less than 50mm or chord length/200 Are all multiple ply trusses nailed/screwed/bolted together? Are all waling plates fixed to truss as per design? Is gable end framing as per design? Do all trusses in corrosive environments have stainless steel plates and/or other suitable protection? Temporary bracing Are top chord temporary ties no greater than 3000mm spacing? Are bottom chord temporary ties no greater than 4000mm spacing? Permanent Bracing TOP CHORD BRACING Is the Speedbrace configuration correct? Is the Speedbrace apex fixing correct? Is the Speedbrace fixing to each truss top chord correct? Is the Speedbrace splice detail correct? Is the Speedbrace top plate fixing correct? Has all cantilever and web bracing been installed as per design? Have all web ties been installed and braced back to a rigid part of the building with cross braces? Are roof battens of correct size and grade? Are roof battens fixed to each truss including to each ply of double and triple girders using the correct size nails? Are roof battens spliced correctly: (a) No more than 1 in 3 on any truss? (b) No 2 splices adjacent on any truss and none in unbraced zones of gable roof ends? Are intermediate top chord ties fixed between saddle trusses (if applicable)? BOTTOM CHORD BRACING For suspended ceilings or where furring channels are “clipped” to bottom chords – have bottom chord ties and diagonal bracing been installed? Truss Connection Details Have trusses been fixed to top plates correctly at: Load bearing wall? Internal non-brace wall? Internal braced wall? Have hip end components been fixed correctly at: (a) Jack truss to hip truss – small stations (b) Jack truss to hip truss – large station (c) Hip truss & jack trusses to truncated girder and to truncated standard truss (d) Structural fascia and/or strutted overhangs Are saddle trusses fixed in accordance with guidelines? Are standard roof truss to girder truss fixing type according to approved plans and are all nails/bolts installed and tight? Has all strengthening been completed for guard rail systems (if applicable)?