MWFRS Wall Pressure (ASCE 7 Ch. 27)
The lateral pressure the whole building resists, feeding the diaphragm and shear walls: ASCE 7 Chapter 27 MWFRS p = q G Cp - qi (GCpi), G = 0.85 rigid, Cp +0.8 windward / -0.5 leeward. A 25.9 psf building carries +22.3 psf on the windward wall (pushing in) and -15.7 psf on the leeward (suction), for a 28.6 psf net horizontal design pressure - the internal pressure cancels in the net, so the story force is insensitive to enclosure while the walls are not. Enter qz/qh from wind-pressure. Walls only. A design aid, not the engineer of record's stamped design.
Formula and source
p_ww = qz G Cp_ww +/- qh GCpi (worst sign); p_lw = qh G Cp_lw +/- qh GCpi (worst sign); p_net = qz G Cp_ww - qh G Cp_lw (internal cancels).
The ASCE 7-22 Chapter 27 MWFRS design wall pressure p = q G Cp - qi (GCpi), with G = 0.85 (rigid), the wall Cp (+0.8 windward, -0.5 leeward for L/B <= 1), and GCpi = +/-0.18 (enclosed), by name.
Audience
This tile is built for carpentry and the adjacent professions in the Carpentry and Construction group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tools
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.