Roofing Using 2x4

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.

Roofing using 2x4.

Floor joist on 16 inch centers. 2 pieces 2x4 x10 feet boards pressure treated. One foot overhang so could say 11x16. Front and sides will sit on deck on a 2x4 wall with studs 24 oc and screened in.

The width of metal panels will determine the rafter spacing. Built on 4 12 pitch roof with 1 2 ply decking and shingles. Roof will be roughly 12 x 16. There is a chance of damaging roofing sheets if you are failed to do so.

A rough 2x4 had a lot more strength that a finished one. Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing material calculator. For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. 1 3 of the way from each in to keep it from spreading from snow load.

Rafters are on 2 ft spacing. Measure each section of the roof from side to side parallel to the line of the fascia board. 2 pieces 12 feet aluminum. For this example a section of roof is 20 feet wide.

The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans. 5 pieces 2x4 x12 feet boards pressure treated. For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. Access the roof using an extension ladder.

Rafters to 2x4 with joist hangers. 2x4 x8 feet boards. I put 2 2x4 joist about. 60 pieces 2x4 x12 feet boards.

In bending 2 4 2 purlins would work at 12 on center however i personally would not want to walk on top of them. It s made 11 winters here and look like the day i finished it.