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Though CAL can do this, but how can I complete in an AutoLISP file? Thank you

Ontario building code give 4', but I want to have a detail data for GTA. I want to build a small deck and don't want to make so deep a foundation.

case 1 for L1, it shall be 1.75 per CAN S16-01 for k=0. Why omiga 2 is 1.0? Anyon could give me an answer? Thank you.

Af is flange area in this code, does it include compression and tension flange? I can't find more commentary for it and the similar formula?Af is compression flange area in AISC 89. So I want to make sure I didn't misunderstand. Thank you.

What percentage the p-delta contribute to stress ratio for column of steel structure you found? I got 1% for braced frame and 5% for moment resistent frame.

If the flange to web welds is not develop the full capacity of web. How to check the weld strength? Let say, web=30mm, bending f=0.6Fy, shear ft=0.2Fy, how to calculated the weld thickness?

Figure 6-9 (page 52) shown 4 wind load case, but it seems most design only used case 1 in load combination. When we need to use all 4 case? Thank you

Do anyone know the minimum weld size requirement in Canadian code? I can't find it in CAN/CSA-S16-01. Thanks.

As per 12.14.3.1.2, vertical effect should be considered if Sds>=0.125. Is that rignt? But I can't find ths same requirement in IBC 2006, and seems not too much engineer used it.

I remeber the strength ( or allowance stress) should time a coefficient (<1)? but I forgot what's the exact. Can you give me a answer?