🏢 AAMA 501.4 / ASCE 7 (Dynamic Seismic Interstory Drift Δ & Thermal Expansion Gap)

Curtain Wall Expansion Joint Calculator

Size stack joints and horizontal expansion joints for unitized curtain wall facades accommodating building thermal expansion and seismic interstory drift under AAMA 501.4 & ASCE 7: calculate maximum horizontal and vertical drift displacements without glass-to-aluminum contact or sealant tearing, and architectural engineering profits.

1. Project & Operating Inputs

Curtain Wall Floor Stacks Engineered (Floor Count e.g. 28 Stories)

Design Interstory Seismic Drift (Inches e.g. 1.25" Inelastic Drift)

Customer Bid Price for Facade Drift Analysis & Joint Detailing ($ / Floor)

3D FEA Thermal/Drift Modeling, Shop Drawing Engineering Stamp ($ / Floor)

2. Financial Breakdown & Yield

AAMA 501.4 SEISMIC DRIFT JOINTS

Turnkey Facade Engineering Package Profit

Curtain Wall Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost