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Usable Area and Occupant Load Estimator
A gross lease is not play area, and play area is not legal capacity. This works the gross figure down to usable area, then to the occupant load your use classification allows, and flags the point where a sprinkler system becomes mandatory.
Your unit and its classification
The figure on the lease, before circulation is taken out.
Occupant load factors are written in net square feet.
A standalone play centre is usually A-3, not E.
After circulation, toilets, party rooms and back of house.
The figures this estimator applies
| Input | Figure | Where the figure comes from |
|---|---|---|
| Assembly occupant load, standing space | 5 net sq ft per person | Washington State building code, WAC 51-50-1004 |
| Assembly occupant load, unconcentrated seating | 15 net sq ft per person | WAC 51-50-1004 |
| Day care occupant load | 35 net sq ft per person | WAC 51-50-1004 |
| Sprinkler trigger, A-3 assembly | 12,000 sq ft of fire area, or an occupant load of 300 | WAC 51-54A-0903 |
| Sprinkler trigger, E and I-4 | Occupant load of 51 | WAC 51-54A-0903 |
| Usable share of a gross lease | 60 to 70 percent | Operator planning guides |
Send the plan and the classification together
Send the floor plan with the clear height and the intended age bands on it. Quotation comes back in 3 working days once those are in hand, and the layout is drawn against your usable area rather than your gross lease.
Send Your Floor Plan for a Quote →Occupant load factors and sprinkler triggers here are quoted from the Washington State building code, which adopts the International Building Code with state amendments. Your own jurisdiction adopts its own edition and amendments, so confirm both the classification and the trigger with the authority having jurisdiction before signing. Equipment suppliers do not set occupancy classification.
