Pole Barn Snow Load Calculator
Local roof snow-load prompts with ASCE, IBC, truss, post-frame, AHJ, and structural-review boundaries visible
Source-aware pole barn snow-load screen that applies local prompt rows for ground snow load, exposure, thermal factor, importance factor, roof slope, and optional drift geometry. The output is a planning prompt for conversation with the building official, truss supplier, post-frame designer, or structural engineer. It is not an ASCE 7 calculation package, IBC compliance decision, permit submittal, stamped truss design, post/purlin/foundation check, collapse-risk assessment, emergency snow-removal instruction, or approval to occupy, repair, or modify a structure.
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Enter Source Snow Data
Enter the ground snow-load prompt after checking the adopted code, ASCE Hazard Tool or local data, parcel elevation, case-study-region status, and AHJ requirements. Built-in city rows are convenience prompts only.
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Set Local Factors
Select exposure, thermal, importance, roof type, and slope prompts. These local factors help frame review questions and do not replace ASCE 7 provisions or local amendments.
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Screen Drift Geometry
Enable the drift prompt only when a taller roof, ridge, parapet, adjacent structure, tree line, lean-to, or other obstruction may create local drifting. Real drift design needs project geometry and qualified review.
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Review Prompt Outputs
Review balanced roof snow, slope, drift, dead-load placeholder, and example truss-rating label comparisons as source-aware prompts, not capacity decisions.
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Resolve Source Gaps
Before design or field action, reconcile adopted code, ASCE data, load combinations, truss drawings, permanent bracing, purlins, posts, connections, foundations, building condition, and structural review.
Built For
- Owners collecting snow-load questions before talking with a truss supplier or engineer
- Post-frame buyers comparing package assumptions against local code prompts
- Contractors documenting source gaps before permit or truss-submittal review
- Inspectors and adjusters noting that the app is not a structural condition or collapse decision
- Property buyers identifying what data a qualified structural review still needs
Assumptions
- Ground snow load is user-entered or selected from local prompt rows and must be verified against adopted source data.
- Exposure, thermal, importance, slope, and drift selections are local prompts rather than final ASCE factors.
- Dead load is a fixed planning placeholder and not a roof assembly takeoff.
- Example truss rating rows are psf labels only and do not represent stamped truss capacity.
Limitations
- Does not determine adopted code edition, local amendments, permit requirements, AHJ acceptance, or risk category.
- Does not perform full ASCE snow, unbalanced, sliding, rain-on-snow, wind, seismic, or load-combination analysis.
- Does not check truss members, truss spacing, permanent bracing, purlins, posts, post embedment, connections, foundations, diaphragm, uplift, or deflection.
- Does not evaluate existing condition, deterioration, damage, repair, emergency shoring, snow removal, or occupancy safety.
References
- ASCE 7-22 - Minimum Design Loads and Associated Criteria (source pointer)
- ASCE 7 Hazard Tool - site hazard data lookup source pointer
- 2024 IBC Chapter 16 - Structural Design source pointer
- ANSI/TPI 1-2022 - metal-plate-connected wood truss source pointer
- NFBA Post-Frame Building Design Manual, Second Edition source pointer