Shimming 3 12 Steel Roof Beam

Steel beam new concrete footing poured flush with existing slab lally column permanently supports new beam.

Shimming 3 12 steel roof beam.

Asphalt or composite shingles need at least a 2 12 pitch steel roofing needs a 3 12 pitch or higher and rolled roofing needs a 2 12 pitch or more. My roof sags a little maybe 8 and the bottom edge bows in 4 6. The end of the joists that sit in the steel beam need to come up about and inch and the end that sits on the exterior wall needs to come up about 3 4. 4 12 to 8 12 is the best.

However the higher the pitch the greater the wind force it must withstand. In the example the beam spans the 10 foot width of the roof. They were what looked like the old asbestos siding panels but were a new material without the bad stuff. On center steel or lvl beams can be used in lieu of dimen sional lumber.

Built up beams are. Total load in pounds fbd 2 9l. Step 4 write down the beam strength formula. I was talking to my insurance agent and he recommended replacing my shingles with steel the next time i redo the roof.

The best pitch for shingles is between 4 12 and 12 12. 12d or 16d nails spaced 16 in. If our example roof has only one beam it must carry half of the total load or 4 000 pounds. L stands for the span of the beam in feet.

I can just create a new roof line at the bottom and let it overhang but i m wondering about the sag. Their added strength will allow for wider column spacing but larger footings may be required to carry the load. By installing a 12 header in place of a 3 header the studs supporting the longer header will be supporting much higher concentrated loads although the total load will be the same. Shimming between post and beam i have not seen it used in your application but have seen guys using the steel plates as well as a hardie backer type material for shims.