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Free calculators for code analysis and site design. Built for the professionals who use them.

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Zoning & Site

Code Analysis

Live
Construction Type Tool
Select materials and assembly ratings. Determines qualifying IBC construction types including Type IV mass timber subtypes.
IBC Table 601 · Section 705.5 · Section 602
Live
Height / Area / Stories Calculator
Allowable height, stories, and area with frontage increase. Non-separated vs separated mixed occupancy side by side. Fire separations per Table 508.4.
IBC Tables 504.3 · 504.4 · 506.2 · 508.4
Live
Fire Separation Distance / Exterior Wall Rating
Exterior wall fire-resistance rating, allowable opening area, opening protection, and projection limits by FSD, construction type, occupancy, and sprinkler status. Bearing wall cross-check with Table 602.
IBC Tables 602 · 705.2 · 705.5 · 705.8 · §705.8.1–705.8.6
Live
IBC Egress Width Calculator
Multi-floor egress widths with automatic stair accumulation, exit count warnings, and stair discharge onto exit discharge level with 50% rule check.
IBC §1005.1 · Table 1006.3.3 · §1028.1
Live
Occupant Load Calculator
Occupant load by floor and space per IBC Table 1004.5. All 40 functions of space with gross/net designation, fixed seating by count, and building total with Revit text output.
IBC 2021 Table 1004.5 · §1004.5 · §1004.6
Live
Rehabilitation Subcode Navigator
Scope-of-work classification for existing buildings. Identifies Repair, Renovation, Alteration, Reconstruction, Change of Use, and Addition categories — outputs compliance triggers, Basic Requirements, Supplemental Requirements, and hazard table analysis per use group.
NJAC 5:23-6 · §6.4–6.32 · IECC 2021 CZ 4A/5A

Structural

MEP

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