Access the roof using an extension ladder.
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.
The metal roof purlins spacing must be done correctly within narrow tolerances.
2 pieces 2x4 x10 feet boards pressure treated.
If you have a simple gable shed roof then using 2 4 rafters makes more sense unless you have a very large shed.
2 pieces 12 feet aluminum.
There is a chance of damaging roofing sheets if you are failed to do so.
2x4 x8 feet boards.
The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans.
The wider the roofing panels the greater spacing distance you should put.
For this example a section of roof is 20 feet wide.
Floor joist on 16 inch centers.
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.
Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing material calculator.
It s made 11 winters here and look like the day i finished it.
For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters.
I put 2 2x4 joist about.
A rough 2x4 had a lot more strength that a finished one.
1 3 of the way from each in to keep it from spreading from snow load.
60 pieces 2x4 x12 feet boards.
Measure each section of the roof from side to side parallel to the line of the fascia board.
The width of metal panels will determine the rafter spacing.
Rafters to 2x4 with joist hangers.
Roof will be roughly 12 x 16.
Front and sides will sit on deck on a 2x4 wall with studs 24 oc and screened in.
Built on 4 12 pitch roof with 1 2 ply decking and shingles.