Gate 7 Garage 65 Construction Documents Structural Calculations

Owner / Project
GSA
Capital Projects Division, Office of Design and Construction

Calculations for
Gate 7 Garage
65% Design Submission
Pages 1 - 139

Prepared by
A+F Engineers Inc.
1112 16th Street NW #720
Washington DC 20036
Date

17 August 2026

A & F Engineers Inc. – www.af-engineers.com – Maryland & Washington, DC – (202)-628-1600

ASCE Hazards Report
Address:

ASCE/SEI 7-22

Standard:
2701 Martin Luther King Jr
Risk Category: II
Ave SE
D - Stiff Soil
Soil Class:
Washington, District of Columbia
20032

Latitude: 38.852972
Longitude: -77.001158
Elevation: 132.14906479635525 ft

(NAVD 88)

Wind
Results:
Wind Speed

113 Vmph

10-year MRI

75 Vmph

25-year MRI

84 Vmph

50-year MRI

89 Vmph

100-year MRI

95 Vmph

300-year MRI

105 Vmph

700-year MRI

113 Vmph

1,700-year MRI

120 Vmph

3,000-year MRI

125 Vmph

10,000-year MRI

136 Vmph

100,000-year MRI

157 Vmph

1,000,000-year MRI

178 Vmph

Data Source:

ASCE/SEI 7-22, Fig. 26.5-1B and Figs. CC.2-1–CC.2-4, and Section 26.5.2

Date Accessed:

Thu Jul 03 2025

https://ascehazardtool.org/

Thu Jul 03 2025

Value provided is 3-second gust wind speeds at 33 ft above ground for Exposure C Category, based on linear interpolation between contours. Wind speeds are interpolated in accordance with the 7-22 Standard. Wind speeds correspond to approximately a 7% probability of exceedance in 50 years (annual exceedance probability = 0.00143, MRI = 700 years). Values for 10-year MRI, 25-year MRI, 50-year MRI and 100-year MRI are Service Level wind speeds, all other wind speeds are Ultimate wind speeds.

Site is not in a hurricane-prone region as defined in ASCE/SEI 7-22 Section 26.2.

https://ascehazardtool.org/

Thu Jul 03 2025

Seismic
Site Soil Class:
Results:

D - Stiff Soil

PGA M :

S MS :
S M1 :
S DS :
S D1 :

0.084
0.19
0.088
0.13
0.059

TL :
SS :
S1 :
V S30

:

0.15
0.042

Seismic Design Category: A
Multi-Period MCER Spectrum

Multi-Period Design Spectrum

Sa (g) vs T(s)

Sa (g) vs T(s)

Two-Period MCE R Spectrum

Two-Period Design Spectrum

Sa (g) vs T(s)

Sa (g) vs T(s)

MCER Vertical Response Spectrum
Vertical ground motion data has not yet been made
available by USGS.

https://ascehazardtool.org/

Design Vertical Response Spectrum
Vertical ground motion data has not yet been made
available by USGS.

Thu Jul 03 2025

Data Accessed:
Thu Jul 03 2025
Date Source:
USGS Seismic Design Maps based on ASCE/SEI 7-22 and ASCE/SEI 7-22 Table 1.5-2. Additional data for site-specific ground motion procedures in accordance with ASCE/SEI 7-22 Ch. 21 are available from USGS.