Truss Design: Difference between revisions
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*For a 32' long truss with 1/2" web, the limiting factor for span is not the web - it's the chords. In fact, there could be a break in the OSB in the middle, and it would not affect the truss bearing capacity much - but a break near the support points would be catastrophic. [https://chatgpt.com/share/68731799-c884-8010-b1d4-405eacd6938f] | *For a 32' long truss with 1/2" web, the limiting factor for span is not the web - it's the chords. In fact, there could be a break in the OSB in the middle, and it would not affect the truss bearing capacity much - but a break near the support points would be catastrophic. [https://chatgpt.com/share/68731799-c884-8010-b1d4-405eacd6938f] | ||
*32' truss with 24" on center - 1/2" web by 16" tall - has 3200 lb on it at 50 psf, and 1600 shear at ends. Shear capacity of the OSB is 2400 lb, so we are fine on shear. [https://chatgpt.com/share/68731799-c884-8010-b1d4-405eacd6938f]. We are not fine on tension at bottom chord [https://chatgpt.com/share/68731799-c884-8010-b1d4-405eacd6938f] | |||
=Links= | =Links= | ||
*[[I-Joists]] | *[[I-Joists]] | ||
Revision as of 03:31, 13 July 2025
- For a 32' long truss with 1/2" web, the limiting factor for span is not the web - it's the chords. In fact, there could be a break in the OSB in the middle, and it would not affect the truss bearing capacity much - but a break near the support points would be catastrophic. [1]
- 32' truss with 24" on center - 1/2" web by 16" tall - has 3200 lb on it at 50 psf, and 1600 shear at ends. Shear capacity of the OSB is 2400 lb, so we are fine on shear. [2]. We are not fine on tension at bottom chord [3]