The width of metal panels will determine the rafter spacing.
Metal roof rafters.
Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging.
The spacing of your purlins depends on the expected snow and wind load.
In some cases however the exact spacing of the rafters doesn t matter if the roof has other means of supporting the metal panels.
12 50 a foot 12 40 14 95 a foot 42 60 all lean to shed trusses 1 12 pitch.
All trusses are on a 4 12 pitch.
If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch.
All trusses come with a 1 overhang.
The metal roof purlins spacing must be done correctly within narrow tolerances.
This allows the panels to be securely attached to the rafters for maximum stability.
The wider the roofing panels the greater spacing distance you should put.
A 30x40 building has 4 bays no welding is required on any of our products.
Place corner pieces where panels will meet bends at the edge of the roofing.
Custom overhang and pitches are available for additional charges shown below.
Lean to trusses are stocked in a 1 12 slope x 12 and 20 width and special order up to 30 wide.
Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.
All trusses come with necessary nuts and bolts to assemble.
All come with 16 overhang past post.
Rafter boards are fastened to the ridge board at the peak and the top plate where they join the wall.
Steel trusses come in three types.
The number of clips tells you how many 2x6 purlings you will need per bay.
The boards creating the slope of the roof are wider than lumber used to build trusses 2x8s 2x10s and 2x12s are most common in rafters vs.
All american made engineered agricultural gable trusses 4 12 pitch heavy duty 2 angled steel painted black.
Options to set the roof girders on wood post or concrete wall also available.
Roof trusses are on a 4 12 pitch and lean to trusses are on a 2 12 pitch.
12 50 a foot up to 20 14 95 a foot over 20 we stock 24 30 and 40 gable trusses and 12 lean to trusses.
Custom pitch of up to 6 12 up to a 30 foot truss is available with a 1 00 per foot surcharge per truss.
When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels.
Gable trusses are in stocked in a 4 12 slope x 20 24 30 and 40 width and special order up to 50 wide 60 for tubing trusses.
All hardware is included with the price of trusses.
A sl series truss is a single slope truss that includes steel girders and steel columns with clear span widths from 10 through 80 with available eave heights of 8 through 20.
