For heavy loads 2x4s can span up to 5.
Rafter spacing for metal roof.
Rafter spacing for metal roof purlin hangers clips are available if you would rather the purlin be on the same level as the rafter rather than on top of the rafter.
Rafter spacing is based on the width of the metal roofing panels.
Wider panels allow for greater spacing between rafters.
The wider the roofing panels the greater spacing distance you should put.
2 4 rafters can span up to 7.
The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof.
Other relevant factors include the type of wood being used for the rafters the size of the rafters and the load that the rafters need to support.
A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.
Determine the location of a rafter by a vertical set of nails in the fascia board or by an.
Correctly measure the spacing of furring strips for a metal roof to further decrease condensation.
The metal roof purlins spacing must be done correctly within narrow tolerances.
For light load roofs 24 o c.