Revolving Door and Turnstile Peak Throughput

Throughput is compartments per minute times people per compartment, and the headline figure and the achievable one differ because of behaviour: people arrive unevenly, carry things, hesitate, and do not fill every compartment. A 4-wing door at 3 rpm with 2 per compartment is theoretically 1,440 people an hour and realistically about 864 at 60% utilization. THE COMPARISON THAT MATTERS IS AGAINST THE PEAK. A building of 2,000 occupants does not arrive over eight hours; if 70% of them arrive in a 20 minute window that is 1,400 people, a rate of 4,200 an hour, and it takes FIVE doors to clear it without a queue. The daily average -- 2,000 over 8 hours, 250 an hour -- says one door. That factor of five is the whole error, and the building is judged at 8:50 in the morning, not at 2 in the afternoon. Install three doors against that peak and roughly 536 people are still outside when the window closes. Egress is a separate and code-governed matter. Revolving doors and turnstiles receive limited or no credit toward required egress capacity depending on the code and the arrangement, so a lobby that meets its throughput target with revolving doors alone still needs conventional swinging doors for egress, and the two requirements are sized independently. A throughput comparison from rates the user supplies. The utilization discount is a judgment rather than a measurement, and real throughput depends on bag and cart traffic, badge or turnstile interaction time, and wheelchair and accessible-door usage diverting traffic -- and bidirectional use roughly halves a revolving door's one-way figure. It does not address the egress credit a revolving door or turnstile receives, the collapsible-wing requirement, or the adjacent swinging door requirement, all of which are set by the adopted codes and must be satisfied independently of throughput. It does not address accessibility, which requires an accessible route that a revolving door or turnstile does not provide. The adopted building, fire, and accessibility codes, the manufacturer's rated capacities, and the AHJ govern.

theoretical people per hour = rotations per minute x wings x people per compartment x 60, discounted by a utilization factor; peak rate = population x peak fraction / the peak window in hours; doors required = the peak rate divided by the discounted throughput, rounded up.

The compartment throughput relation by name, compared against a peak arrival rate rather than a daily average, with the adopted building and fire codes named as governing the egress credit a revolving door or turnstile receives.

Rate arithmetic on figures the user supplies; no manufacturer capacity table is reproduced.

Estimate. AHJ and licensed professional govern.

Field names used by the API: rpm, wings, people_per_compartment, utilization_pct, building_population, peak_fraction_pct, peak_window_min, device_count, operating_hours, theoretical_per_hour, effective_per_hour, peak_people, peak_rate_per_hour, devices_required, queue_at_peak, average_rate_per_hour

• Design to the peak, not the average they routinely differ by a factor of five, and the building is judged at the peaktraffic design practice
• Utilization is a judgment bag and cart traffic, badge interaction, and bidirectional use all cut the theoretical figuretraffic design practice
• Egress is sized separately revolving doors and turnstiles carry limited or no egress creditadopted building code