About the ASCE Hazard Tool

How to use the Hazard Tool

• Selecting Your Site

  1. Select your site location by entering a street address or latitude/longitude, or select "Find on Map" and drop a pin directly onto the map.
  2. Choose the edition of the Standard you are using: ASCE/SEI 7-10, ASCE/SEI 7-16, ASCE/SEI 7-22, ASCE/SEI 41-17, or ASCE/SEI 41-23.
  3. If you are looking up values for hazard data in ASCE/SEI 7, select your Risk category. If you are looking up values for Seismic hazard data, choose your Site Soil Class.
  4. Choose whether to view the results in Customary or SI units.
  5. Select the Load Types you want to view. ASCE/SEI 41 Standards only provide data relevant to seismic hazards.
  6. Click View Results

• Viewing Results

  Results for each load type will be displayed on the following page. The Hazard Tool provides several different ways to view or download data for each load type:

  • Clicking the Overlay button button will display a color overlay of the surrounding region on the map.
  • Clicking Details will display a popup window showing detailed data results for the desired load type.
  • The Full Report button assembles the data results for all load types into a single PDF report, which you can then download.
  • The Summary button displays a popup window showing data results for all load types in a plaintext table format, which you can copy and paste into your own documents.

  If you want to go back to the first screen and change your input (for example, if you wish to change site locations or select different load types), use the return arrow button in the upper left hand part of the screen.

Data sources

The ASCE Hazard Tool uses data from, based on, and recommended by Standards ASCE/SEI 7-10, ASCE/SEI 7-16, ASCE/SEI 7-22, ASCE/SEI 41-17, and ASCE/SEI 41-23.

• ASCE/SEI 7

  Wind:

  • ASCE/SEI 7-10 Figs. 26.5-1A–C and CC-1–CC-4, incorporating errata of March 12, 2014
  • ASCE/SEI 7-16 Figs. 26.5-1A–D, 26.5-2A–D, and CC.2-1–CC.2-4
  • ASCE/SEI 7-22 Fig. 26.5-1C and Figs. CC.2-1–CC.2-4, and Section 26.5.2

  Tornado:

  • ASCE/SEI 7-22, Ch. 32

  Seismic:

  • USGS Seismic Design Maps data prepared in collaboration with ASCE/SEI and the Building Seismic Safety Council, recommended by Ch. 22 (all versions)

  Ice:

  • ASCE/SEI 7-10 Figs. 10-2–10-8
  • ASCE/SEI 7-16 Figs. 10-4.2–10-4.6 and 10-6.1–10-6.2
  • ASCE/SEI 7-22 Figs. 10-2 through 10-8

  Snow:

  • ASCE/SEI 7-10 Fig. 7-1 and Table 7-1
  • ASCE/SEI 7-16 Fig. 7.2-1 and Tables 7.2-1–7.2-8
  • ASCE/SEI 7-22 Figures 7.6-1 and 7.6-2 A-D

  Rain:

  • NOAA Hydrometeorological Design Studies Center data, suggested by Ch. C8 (ASCE/SEI 7-16 and ASCE/SEI 7-22)

  Flood:

  • FEMA National Flood Hazard Layer data, the basis for Ch. 5 (all versions)

  Tsunami:

  • ASCE Tsunami Design Geodatabase (Ch. 6, ASCE/SEI 7-16 and ASCE/SEI 7-22)

  The ASCE Hazard Tool also incorporates elevation data from the USGS National Map.

Frequently asked questions

• Do I need to purchase a subscription to use the ASCE 7 Hazard Tool?

  No. The ASCE Hazard Tool is free to all users.

• What information is provided by the Hazard Tool?

  The ASCE Hazard Tool provides site-specific data in both customary and SI units for environmental hazards as specified in ASCE/SEI 7-10, ASCE/SEI 7-16, ASCE/SEI 7-22, ASCE/SEI 41-17, and ASCE/SEI 41-23:

  • Three-second gust wind speeds at 33 feet (10 meters) above ground for Exposure Category C, including identification of hurricane-prone and wind-borne debris regions
  • Seismic coefficients S_S, S₁, F_a, F_v, S_MS, S_M1, S_DS, S_D1, T_L, PGA, PGA_M, F_PGA, l_e, Cv, S_a, and V_S30, plus the seismic design category
  • Radial ice thickness with concurrent 3-second gust speeds for 50-year mean recurrence interval and temperature concurrent with ice thickness due to freezing rain
  • Ground snow load, 20-year MRI value, and Winter Wind parameter (W2)
  • Median 15-minute and 60-minute duration rainfall intensities for 100-year mean recurrence interval
  • Flood zone and static base flood elevation, plus direct links to additional information
  • Tornado wind speeds for 1,700-, 3,000-, 10,000-, 100,000-, 1,000,000-, and 10,000,000-year MRI, and for 1-, 2,000-, 10,000-, 40,000-, 100,000-, 250,000-, 1,000,000-, and 4,000,000-ft₂. target areas
  • Whether the site is in a mapped tsunami design zone per the ASCE Tsunami Design Geodatabase.
  • Seismic hazard data from ASCE/SEI 41-23 and 41-17, including coefficients and response spectra grouped by different hazard level responses (BSE-2N, BSE-1N, etc…).

• How do I download a report?

  Click Summary to view a summary report suitable for copying and pasting, or generate and download a full PDF report by clicking Full Report.

• How can I contact ASCE about the Hazard Tool?

  To report any issues or provide feedback on the Hazard Tool, please complete our form. To request a quote for the ASCE Hazard Tool API, please complete our Sales Inquiry form.