Roofing Using 2x4

A rough 2x4 had a lot more strength that a finished one.

Roofing using 2x4.

It s made 11 winters here and look like the day i finished it. I put 2 2x4 joist about. Roof will be roughly 12 x 16. Measure each section of the roof from side to side parallel to the line of the fascia board.

For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. In bending 2 4 2 purlins would work at 12 on center however i personally would not want to walk on top of them. Rafters to 2x4 with joist hangers. The wider the roofing panels the greater spacing distance you should put.

Access the roof using an extension ladder. 1 3 of the way from each in to keep it from spreading from snow load. If you have a simple gable shed roof then using 2 4 rafters makes more sense unless you have a very large shed. Built on 4 12 pitch roof with 1 2 ply decking and shingles.

For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing material calculator. Front and sides will sit on deck on a 2x4 wall with studs 24 oc and screened in. 2 pieces 12 feet aluminum.

The metal roof purlins spacing must be done correctly within narrow tolerances. For this example a section of roof is 20 feet wide. Floor joist on 16 inch centers. 60 pieces 2x4 x12 feet boards.

Without even running the calculations i would say there is a good chance the 2 4 purlins will not make the deflection criteria required for a roof framing member supporting steel. The width of metal panels will determine the rafter spacing. One foot overhang so could say 11x16. 5 pieces 2x4 x12 feet boards pressure treated.

There is a chance of damaging roofing sheets if you are failed to do so. 2x4 x8 feet boards.