ScotCalc — Seismic Design Parameters

Scottsdale Construction Systems

ScotCalc

Engineering Tools

Seismic Design Parameters

ASCE/SEI 7-16 & 7-22 site-adjusted values, sourced live from the USGS Seismic Design Web Service.

Street Address

Risk Category

Site Class · 7-16

Site Class · 7-22

Building Period (optional)

Fundamental period, T (seconds)

Structural height, h_n (feet)

Structural System (Table 12.8-2)

Approximate fundamental period per ASCE 7 §12.8.2.1: T_a = C_t · h_n^x

Querying USGS hazard service…

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Site

Coordinates

Reference Standard

ASCE/SEI 7-16

Site D · RC II

Reference Standard

ASCE/SEI 7-22

Site D · RC II

Design Response Spectra

5%-damped horizontal design spectra, S_a(T) — code-edition comparison.

ASCE 7-16 — two-period spectrum

ASCE 7-22 — multi-period spectrum

Base & Story Shear — Equivalent Lateral Force (§12.8)

Computes the ELF base shear and vertical force distribution from the design parameters above.

Compute the design parameters first. Enter a location at the top and click “Compute Parameters.” This section then unlocks and uses those S_DS, S_D1, S₁ and T_L values.

Data source: U.S. Geological Survey Seismic Design Web Service (earthquake.usgs.gov/ws/building-codes). Address geocoding by U.S. Census Bureau, with OpenStreetMap Nominatim as fallback. Results are intended as a preliminary reference; values must be verified against the governing code edition and a licensed engineer's site-specific evaluation before use in structural design. Scottsdale Construction Systems assumes no liability for the use of these values.