SU.1056b Wind loads by ASCE 7 and the code seismic hazard data and spectrum

Split from SU.1056 (ETABS ask #1056): wind by code, the code's seismic hazard data and the spectrum. Built, owner 2026-11-06 (do not wait for bought pages).

Reachable in the Analysis panel of BimCraft and DetailCraft: Wind loads (ASCE 7-10 / 7-16 directional procedure, rigid enclosed building: V, exposure B/C/D, Kzt, Kd, Ke, G, enclosure, qz at every floor, wall pressures, a force on every floor as load cases +-X/+-Y), Seismic site and system (Ss, S1, site class A-D to Fa, Fv, SDS, SD1 for 7-16; SMS/SM1 for 7-22; R, Cd, Omega0 of seven systems; design spectrum; optional USGS lookup only when you press the button; fills the Seismic block), ASCE 7 combinations (LRFD and ASD, vertical seismic effect, overstrength) feeding the combination machinery. Saved with the model, in the PDF/CSV report, with a Sources list and a left-out list in the panel. Spectrum module lib/frame/spectrum-asce7.js designSpectrum({SDS, SD1, TL}) for the response-spectrum analysis.

Method: every value kept only if two independent public pages print it (URLs and date read in lib/frame/loads-sources.js). Left out and listed: ASCE 7-22 wind, V by risk category, Kz table beyond the formula, leeward Cp for L/B above 1 (-0.5 used and flagged), roof pressures, site class E/F, Ie for risk I/III, most of Table 12.2-1, 7-22 combinations, Eurocode wind. The 0.8 constants were checked: Ct SI values were on no page (now converted from the US values), Table 12.12-1 drift ratios are unconfirmed (flagged). Known-answer tests from published examples (STAAD, SkyCiv, SEAOC, FEMA P-2192). Not a code check; no claim of equality with any program.

Hand check: SU.1056b-HAND. wind-seismic 2026-11-06: docs/0.9-sessions/fem-09.md