Apr 7, 2026 — Clifton

Grandstands & Bleachers

You're programming a gym, field, or assembly space and need to know: how many rows to hit a seat count, how deep the seating section gets, and what the sightline looks like from the back row. This configurator draws the cross-section with correct riser heights, tread depths, and aisle widths so you can see the spatial impact of a seating capacity number. Use it before you dimension the building section.

Purpose: reveals how riser height, row count, and tread depth trade off between capacity, sightlines, and total section depth.
—
total seats
—
open depth
—
total rise

The capacity table assumes 18″ per person per row. Each 36″ aisle removes two seats per row. Lowrise telescopic bleachers use a 9⅝″ riser — the default for most venues. Highrise models (11⅝″ or 16″) are for pools, balconies, and hockey rinks where steep banking improves sightlines.

Next improvement: The likeliest next improvement is adding ADA wheelchair seating positions — the required number, dispersion, and sightline compliance per IBC 1109 and ADA §221.

Future: Theater Seating Configurator — continental vs. conventional seating layouts with row spacing, aisle width, and egress capacity per IBC 1029.

Future: Stadium Bowl Generator — curved seating sections with C-value sightline analysis, vomitory placement, and concourse width, from IBC Chapter 10 and FIFA/UEFA technical standards.