Training 11: Worked calculation, cold-formed steel
A wall stud, axial load and wind. New calculation, Cold-formed steel stud.
Inputs. State the Web holes setting yourself, here and on your projects: a standard SSMA stud is punched, and the code does not choose for you.
| Input | Value |
|---|---|
| Section | 600S162-54, Fy = 50 ksi |
| Length, spacing | 12 ft, at 16 in. |
| Axial loads | D = 400 lb, L = 1,000 lb |
| Wind on the wall | W = 30 psf |
| Web holes | None (unpunched web), then Punched web |
Unpunched web #
600S162-54 at 16 in, 12.00 ft, Adequate, governing Combined axial and bending, 0.394, under 1.2D + 1.0W + L. The nominal axial strength Pn (E2 / E3) is 11,830 lb, and the shear strength Vn is 4,516 lb. The factored axial load is 2,080 lb under 1.2D + 1.6L.
Punched web #
Change Web holes to Punched web.
| None | Punched | |
|---|---|---|
| Pn (E2 / E3) | 11,830 lb | 10,181 lb |
| Vn (G2.1) | 4,516 lb | 3,115 lb |
| Available axial strength, 1.2D + 1.6L | 10,055 lb | 8,654 lb |
| Combined axial and bending | 0.394 | 0.419 |
The stud still passes, with less to spare. Check what your supplier's stud has, and set the input to match.
On the section tables. The listed sections are the SSMA designations. See the chapter for what the module was checked against.