Release notes

New

• Look up USGS seismic site values by latitude and longitude, in Prose or through an AI assistant
• ASCE 7-22 now computes Cs from the USGS multi-period spectrum, with the two-period spectrum as an option
• Turn off the USGS lookup to enter site values by hand; if USGS is unreachable, Prose says why and keeps your coordinates
• Turning on the USGS lookup takes you to any missing latitude or longitude
• Site values refresh automatically after a code change and pulse while loading
• Seismic reports now show the site coordinates and the source of each site value
• ASCE 7-10 and 7-16 now offer the Default site class (Site Class D coefficients, Fa ≥ 1.2 on 7-16), kept when switching from 7-22

Fixes

• The Seismic Building Design chart now plots the period point at the Cs spectral acceleration
• A bold line now marks the peak of the curve whenever the period point sits at it
• Site coefficients, design values and site inputs now show at most three decimals
• Cs now keeps the 0.044 SDS Ie minimum where S1 ≥ 0.6, and SDC A applies 1% of each level’s weight at that level
• ASCE 7-16 now applies Section 11.4.8: SM1 +50% on Site Class D with S1 ≥ 0.2, and Cs = SDS/(R/Ie) at all periods on Site Class E with Ss ≥ 1.0 or S1 ≥ 0.2
• ASCE 7-22 buckling-restrained and dual eccentrically braced frames now use Table 12.8-2 period coefficients
• Site Class F now asks for site-specific Fa and Fv instead of defaulting to SDC A, and changing site class clears the old coefficients
• Picking a dual system no longer saves the building frame system with the same name
• Opening a level’s menu no longer also opens a system menu
• Seismic reports now match the app’s Cs, Ta and SDC, and the project report includes the multi-period spectrum

• ASCE 7-22 C&C roofs, overhangs and parapets now calculate for buildings over 60 ft
• ASCE 7-22 gable and hip roofs over 7° now use C&C Figures 30.3-2B to 30.3-2G instead of 7-16 values

Other changes

• Existing seismic modules keep your entered site values, and copied structures keep their USGS values

New

• Added ability to connect AI assistants directly to Prose to read, create, and modify your projects
• Sign in to a background Prose through a link the assistant gives you, so an assistant can change projects without the Prose window open
• Added an AI assistants window in the account menu that connects Claude, ChatGPT, Codex, Cursor, VS Code and other assistants to Prose in one click
• The account menu, including AI assistants and Privacy & usage data, is now available before you sign in

Fixes

• The account menu no longer opens partly off the edge of the window

• Changing the building code now updates every seismic module in a structure, not only the first

• Directional wind building dimensions now always save to the region being edited

Other changes

• The Example Retail Project demo now includes its roof R-value

New

• Added a Privacy & usage data window in the account menu to turn anonymous usage sharing on or off
• Added a one-time notice that explains anonymous usage data and lets you keep sharing or turn it off

Fixes

• Losing the internet connection no longer asks you to sign in, and editing returns once you reconnect

• Fixed materials marked available for new projects failing to save in some existing categories

• Design cases on new ASCE 7-22 projects no longer sit disabled without saying the roof R-value is needed

Other changes

• Custom material errors now explain why the material could not be saved

• ASCE 7-22 snow regions now open to the roof R-value and highlight it until it is entered

Fixes

• Structure updates now reject an empty risk category instead of breaking ASCE 7-22 snow calculations
• Opening a project saved by a newer version of Prose now explains why it cannot open instead of failing or showing the previously opened project
• Demo projects saved by an incompatible version of Prose are now reset to their original state when opened instead of failing to open
• Fixed project PDF export failing when a snow report contained an empty table

• Rain load hydraulic head no longer reads Invalid at low flow rates
• Rain load hydraulic head no longer uses values extrapolated past the published flow range
• Rain zone head no longer reads Invalid when only the ponding head is missing
• Corrected rain load code references for controlled drainage, drainage to existing roofs, and definitions
• Switching drainage type no longer discards the drainage system defaults
• Rain load static head and rainfall intensity now default consistently to 2 in. and 1 in/hr
• The 17 in. overflow dam now offers its 10 in. outlet, and changing the inlet clears the outlet
• Scupper inputs no longer start out showing "undefined"
• Design load columns now line up on ASCE 7-22 rain reports
• Drainage area now must be greater than zero

• Corrected ASCE 7-22 roof slope factors for warm and cold roofs
• Corrected ASCE 7-10 cold-roof slope-factor references
• ASCE 7-22 snow calculations no longer assume a roof R-value of 30 when the required value has not been entered
• Snow drift calculations now require the winter wind parameter to be passed explicitly through the calculation path
• Unbalanced hip and gable snow loads now stop outside the ASCE 7 roof-slope applicability range
• Sliding snow surcharges now stop when adjoining roofs are separated by 15 ft or more
• Snow reports now print the snow importance factor Is instead of the seismic importance factor
• Snow report notes for hip and gable rafter roofs and ice dams now use the ASCE 7-22 wording on ASCE 7-22 projects
• Duplicating a structure now copies each snow region once and keeps the winter wind parameter
• Printed ASCE 7-10 and 7-16 drift height equations now show the -1.5 term, the square root of Is, and the drift width limits
• Snow density now reads in pcf in the drift sections, and roof-step drift edits now report whether the save succeeded
• Minimum snow load guidance now states the ASCE 7 limit as roof slopes less than 15°

Other changes

• Rain reports and the rainfall intensity input now show the ASCE 7-22 design storm return period for the risk category
• Rain reports now cite the ASCE commentary table behind each hydraulic head value
• Static head is now labeled d_s and warns when it is below the ASCE 7-22 2 in. minimum
• Renamed rain report and zone headings from "Head Pressure" to "Head"

New

• ✨New Attached Canopies C&C module for ASCE 7-16 and ASCE 7-22

Fixes

• Fixed issue preventing adding Snow drift cases when the roof slope is exactly 0°

• Corrected ASCE 7-16 hip and gable GCp, which began interpolating at the wrong minimum effective area
• Corrected monoslope roof pressures at exactly 3° and 10°, which used the neighboring figure
• Corrected roof pressures on buildings over 60 ft with 7° to 10° slopes, which used the low-slope table instead of the sloped-roof figures
• Corrected ASCE 7-10 roof pressures over 60 ft above 10°, which used the low-rise monoslope figure instead of the sloped-roof figure the tall-building figure requires
• Corrected hip roof corner zone GCp on 7° to 20° slopes, which used the wind-normal width B instead of the least horizontal dimension
• Corrected the reduced edge and corner zone width a, applied on 8° to 10° roofs and at exactly 300 ft of width where it does not apply
• Corrected open roof CN zones, sized from the effective wind area instead of the edge distance a
• Corrected C&C wall suction on buildings over 60 ft, which used qz at the zone elevation instead of qh
• Corrected MWFRS roof overhang pressures, which added 0.8 to the top-surface Cp instead of subtracting it and included internal pressure
• Corrected MWFRS wall pressures and line loads per level: the lowest tributary now starts at the base, and each tributary integrates its actual remaining height
• Corrected MWFRS open roof results when γ=0 and γ=180 land on different figures, which previously failed instead of reporting both
• Corrected which open roof figure MWFRS uses for each wind direction, h/L, and slope, including the low-slope monoslope exception
• Corrected ASCE 7-22 C&C overhang pressures in roof edge zones, which used the corner wall GCp instead of the interior wall GCp
• Corrected the ASCE 7-10 Exposure B Kz minimum, which was not applied to C&C pressures below 30 ft
• Corrected the ASCE 7-10 air density table behind Ke, whose values above 6,000 ft were listed against the wrong elevations
• Corrected the Kzt exemptions, which now apply below rather than at H/L of 0.2, hill height 15 ft in Exposure C and D, and 60 ft in Exposure B
• Velocity pressures above the gradient height no longer assume Kz = 2.01; they now require an engineer-approved value for that exposure and code edition

Other changes

• Values you type are now saved when you leave the field instead of while you are still typing

• Clarified when the minimum ±16 psf C&C design pressure controls, while preserving the calculated pressure for review
• Roof pressure tables now appear in the MWFRS roof section
• Added notes on roof inputs explaining when open building figures apply and which wall zone overhangs use
• Parapet roof zone choices are now limited to the zones that apply, and calculations now stop with a clear message when a roof shape or building height falls outside what the code covers
• Corrected wind code references, equations, and figure labels shown in summaries and reports
• Existing wind projects may show updated pressures when reopened, so re-check your wind results

Fixes

• Fixed ASCE 7-22 windward snow drift widths being cut short once the drift height reached the clear height
• Fixed ASCE 7-22 minimum roof snow load and rain-on-snow surcharge ignoring the structure Risk Category
• Corrected the snow drift width equations shown in ASCE 7-22 reports

Other changes

• Existing ASCE 7-22 projects in Risk Category I, III, or IV may show updated minimum roof snow loads and rain-on-snow surcharges when reopened

New

• Added a navigable outline to wind, snow, and seismic summaries

Fixes

• Fixed sloped-roof MWFRS calculations failing when h/L exceeds 1.0
• Fixed active wind summaries occasionally showing outdated results

Other changes

• Improved wind result tables across on-screen summaries and PDF reports
• Improved PDF table wrapping, repeated headings, equations, and wind figures

Fixes

• Fixed C&C Zone 1' roof pressures for effective areas between 10 and 100 square feet
• Fixed C&C hip roof pressures ignoring the structure width B you entered
• Fixed C&C structure width B entry overwriting the parapet height
• Fixed C&C structure width B entry rejecting buildings wider than 90 feet
• Fixed C&C parapet height entry missing on flat roofs with slopes of 7 degrees or less

Other changes

• Corrected C&C parapet height label on roof inputs
• Existing hip roof projects with slopes between 7 and 20 degrees may show updated pressures when reopened; re-check the structure width B and parapet height values

New

• Added support for choosing between multiple organizations when setting report company info
• New projects now automatically pick up your organization's default company info and logo

Fixes

• Fixed PDF reports occasionally hanging indefinitely when a company logo failed to load
• Fixed the report cover page missing the company logo and header
• Fixed clicking a link in a report PDF navigating away from the app
• Fixed an onboarding tour overlay blocking the Save Project button on first load
• Fixed older projects losing their live organization address after a recent update

Other changes

• Bundled demo projects now ship with sample company info and a logo out of the box
• Added a confirmation prompt before resetting company info back to organization defaults
• Shared project files now show the same company info and logo for every recipient, no matter who opens them

New

• Added the ability to put your company's name and details on reports
• Added your company logo to PDF reports

Fixes

• Fixed Components & Cladding summary tables not showing which region each result belongs to

Other changes

• Improved the look and behavior of module controls
• Refreshed the main screen with a cleaner background

Fixes

• Fixed partially enclosed wind buildings showing open-roof options

Fixes

• Corrected minimum roof load labels so overhang cases are clearly identified
• Corrected roof C&C results so excluded overhangs show zero pressure and coefficient values
• Added validation to prevent zero-area open-roof C&C calculations
• Prevented zero-length topographic inputs from causing wind factor calculation failures

Fixes

• Fixed incorrect wall and parapet wind pressures for east/west wind on buildings with a single exposure category
• Fixed incorrect Components & Cladding wind pressures on certain hip roof Zone 3 configurations (ASCE 7-16)
• Fixed wind summary always showing "Enclosed" for partially enclosed and open buildings
• Fixed open-building parallel-to-ridge cells in the wind summary showing pressure coefficients instead of design pressures
• Added missing "psf" units on flat-roof and open-building wind summary pressure cells

Fixes

• Fixed the assembly name being lost when editing materials in the Dead Load module

New

• Added an Example Retail Project demo, available via the Show Demos toggle on the home screen

Fixes

• Home screen now opens to your recent files instead of the demos view when files exist

New

• Added an Example Multifamily demo project, available via the Show Demos toggle on the home screen

Fixes

• Fixed ASCE Hazard Tool sometimes failing to pre-fill location data
• Fixed minor text issues on the Recent Files list

• Fixed incorrect units shown for rain load zones

• Removed incorrect "psf" unit on h/L in sloping roof Cp tables

Other changes

• Improved load module performance
• Project address, engineer, and EOR now auto-fill into new structures
• Numbered duplicate module types in the sidebar (e.g., Wind 1, Wind 2)
• Mean roof height now rounds to 2 decimal places in reports
• Improved table and figure alignment in rain and wind reports

• Allowed finer decimal precision on drainage system inputs

• Seismic response spectrum is now always visible, with a wrapped criteria table for readability

• Hid topographic factor tables in wind summaries when not used

New

• Added ability to zoom the App in and out with Ctrl + +/- and Ctrl + Mouse Wheel

• Added ASCE 7-22 support for Rain Load Modules

• Added ASCE 7-22 support for Wind Load Modules

Fixes

• Fixed ASCE Hazard Tool not opening correctly

• Fixed broken Drift calculations for all code years
• Fixed snow minimum roof load calculation not saving correctly

• Fixed bugs in seismic levels when building had no levels or top elevation was zero

• Fixed broken image in Components & Cladding for Flat Roofs

Other changes

• Improved sign-in session reliability and license server feedback
• Improved styling on the home screen

New

• Added confirmation dialog when changing building code to prevent accidental data loss

• Added ASCE 7-22 support for Seismic Load Module
• Added automatic seismic system translation when switching between building code editions
• Added seismic design criteria migration when changing building codes

Fixes

• Fixed seismic site coefficient tables for ASCE 7-16 (Fa and Fv values corrected per Supplements 1 and 3)
• Fixed Seismic Design Category determination for high-seismic sites (S1 ≥ 0.75)
• Fixed seismic response coefficient equation display

Other changes

• Improved seismic module interface with updated layout and controls

Fixes

• Fixed sign-in via deep link failing when multiple windows are open

New

• Added ASCE 7-22 support for Snow Load Module
• Added ASCE Hazard Tool integration for looking up ground snow loads and other site-specific data
• Added thermal condition support for heated structures with roof R-value input (ASCE 7-22 Table 7.3-3)
• Added code references (sections, equations, figures, tables) to all snow load calculation forms
• Added mathematical notation with tooltips to snow load table headers
• Added Winter Wind Map modal for W2 parameter visualization (ASCE 7-22)

Fixes

• Added proactive authentication token refresh before session expiry

• Fixed ASCE 7 snow load code references across all editions (7-10, 7-16, 7-22)

New

• Added partial support for IBC 2024 building code

• Added ASCE 7-22 support for Dead Load Module

• Added ASCE 7-22 support for Live Load Module
• Added edition-specific live load tables for ASCE 7-10, 7-16, and 7-22

• Added GCp reduction footnote for walls C&C when 10% reduction is applied for roofs ≤10° slope
• Added validation to prevent parapet elevations below the highest building level

Fixes

• Fixed project summary not displaying live load modules

• Fixed broken tooltips in snow load calculations

• Fixed GCp reduction footnote display and code references in wind C&C summary

Other changes

• Added warnings when opening structures with unsupported modules for the selected building code

Fixes

• Fixed application startup issues

New

• Added success notifications for region creation and deletion in wind directional views

Fixes

• Fixed wind C&C wall pressure calculations not accounting for actual roof slope
• Fixed toast notifications not displaying correctly in wind module

New

• Added floating seat license management for multi-device usage
• Added "Update & Restart" option for application updates

• Added ability to use the same material multiple times in an assembly
• Added success notification when saving assemblies

• Added exposure factor dropdown selection in snow load calculations
• Added option to include minimum snow load design case

Fixes

• Fixed license status not displaying correctly after sign-in
• Fixed application startup failures on slow connections
• Fixed backup tracking for moved or renamed project files

Other changes

• Improved application startup reliability and stability
• Improved project loading with more detailed error messages

• Parapets section now only displays when applicable
• Wind MWFRS reports now exclude parapet sections for buildings without parapets

New

• Added periodic project path validation for Recent Projects

Fixes

• Fixed handling of undefined file paths in Recent Projects list

New

• Improved Recent Projects UX with validation and stale entry handling
• Enhanced loading indicators with project closing state

• Improved open roof table zone ordering

Fixes

• Fixed Cn Values being flipped in snow load calculations

• Fixed issues with design pressures value not displaying correctly in Components & Cladding Parapets
• Fixed walls ≤60ft C&C equation calculations

New

• Added support for Email/Password Login inside the app

Fixes

• Fixed display issues in Sloped Roof Snow Load calculations

Other changes

• Improved Wind MWFRS sloped roof calculations

New

• Added Bookmarks to the Calc Book PDF

New

• Added zoomable image viewing
• Added structure duplication from the sidebar, including nested load modules

• Set rain loads static head defaults to 2"

• Added standard effective areas for Wind C&C and allowed custom ones

Fixes

• Updated Building Code label to "Structural Design Loads per"

• Fixed Wind MWFRS formatting issues

New

• Added Support links to the sidebar

Fixes

• Fixed issues with material import

Fixes

• Fixed issues with the MWFRS Summary display

Fixes

• Fixed issues with stale Equation References in Wind Module summaries

Fixes

• Minor bug fixes and performance improvements

Fixes

• Minor bug fixes in the Code Reference links across the app

New

• Fixed invalid Code References in Snow and Rain Modules

Fixes

• Increases the project load timeout to 30 seconds

Fixes

• Fixed issues in the Wind Module C&C image display

Fixes

• Fixed temp files not being deleted after use

New

• Added bulk edit functionality for materials

Other changes

• Improved app startup time

New

• Added a default assembly when creating a Dead Load Module

New

• Added API link to the sidebar

Fixes

• Minor bug fixes in the user interface

Other changes

• Improved overall performance

New

• Added email notifications for completed tasks

Fixes

• Fixed login issues for new users

Other changes

• Added loading indicators for the Materials Import operations

New

• Added support for bulk importing materials