Stair systems.
OBC-compliant industrial stairs designed alongside your mezzanine. Straight runs, switchback, ship's-ladder — bolted to the mezzanine frame, anchored to the slab, signed off by the same engineer of record.
Code-compliant stairs, drawn in with the mezzanine.
Mezzanine stairs are not a generic catalog item — they have to land where your forklift traffic doesn't, drop where your egress code requires, and tie into the mezzanine frame at points that don't fight your beam pockets. 416 draws the stair into the mezzanine package from day one.
Every stair ships on the engineer-sealed drawing set with the mezzanine. One submittal, one permit, one install crew. No second mobilization.
OBC Section 3.4 governs rise + run + handrail. We design to it, not to it-plus-five-percent.
Built to OBC Section 3.4.
| Element | Spec | Notes |
|---|---|---|
| Riser | 125–200 mm | Uniform per flight, drawing-stamped before fab |
| Run (tread depth) | 230–355 mm | All uniform per flight per OBC 3.4 |
| Treads | Bar grating, diamond plate, or pan-fill concrete | Slip-rated per OBC; tested to ASTM E303 |
| Handrails | 42" guardrail, 4" mid-rail both sides | Continuous run, both sides on ship's-ladder |
| Landings | at 12 vertical ft max | Same surface + load rating as deck |
| Anchor | Bolted to frame at top, slab at bottom | Engineered anchor schedule on the sealed set |
| Finish | Powder-coat safety yellow standard | Galvanized on request |
| Standards | OBC Section 3.4 | Engineer-stamped drawings included |
Three stair patterns.
Single-flight standard
Most efficient footprint when wall space allows. Typical 30-45 deg pitch. Lands directly on slab.
U-turn with intermediate landing
Used when ceiling clearance is tight or stair must drop into a constrained floor zone. Intermediate landing at half-rise.
Steep-pitch access
50-70 deg pitch for low-traffic mezzanines (mechanical decks, secondary egress). Always handrail both sides.
Engineered + installed to OBC.
Rise + run compliant
Riser 125-200mm, run 230-355mm, all uniform per flight. Drawing-stamped before fab.
Slip-rated treads
Serrated bar grating or diamond-plate treads. Tested to ASTM E303 slip resistance.
Two means of egress where required
Mezzanines over 9.3 m² with occupant load require two exits. 416 designs that into the stair layout from the start.
Same salaried crew
Stairs install during the mezzanine mobilization. No second crew, no second mobilization fee.
The rest of the mezzanine package.
Mezzanines
Engineered steel platform decks · the structure your stair ties into
View product →Mezzanine Flooring
Bar grating, resin board or steel deck · matched to the stair tread
View product →Mezzanine Gates
Pivot + slide safety gates at the stair head and pallet drop
View product →Where the stair earns its keep.
Any mezzanine that carries an occupant load needs code access — and the stair is the part the inspector looks at first. Office mezzanines, pick-module decks, mechanical platforms and secondary-egress runs all land here. When the stair is drawn into the mezzanine package from day one, it lands clear of your forklift traffic, ties cleanly into the frame, and clears OBC Section 3.4 the first time.
Questions we hear most.
Which stair pattern fits my mezzanine?
A straight run is the most efficient footprint when wall space allows (30-45 deg pitch, lands directly on slab). A switchback is used when ceiling clearance is tight or the stair must drop into a constrained floor zone, with an intermediate landing at half-rise. A ship's-ladder (50-70 deg pitch) is for low-traffic mezzanines such as mechanical decks or secondary egress, always with handrail both sides. We pick the pattern off your headroom, floor zone and forklift paths.
Are the stairs engineer-stamped?
Yes. Every stair ships on the engineer-sealed drawing set with the mezzanine — engineer-stamped drawings are included as a structural requirement. One submittal, one permit, one install crew. Rise, run and handrail are designed to OBC Section 3.4 and drawing-stamped before fabrication.
What about a second means of egress?
Mezzanines over 9.3 m² with an occupant load require two means of egress. We design that into the stair layout from the start so the second exit isn't bolted on after the permit comes back.
How do the treads stay slip-safe?
Treads are serrated bar grating, diamond-plate or pan-fill concrete, slip-rated per OBC and tested to ASTM E303 slip resistance. Standard finish is powder-coat safety yellow; galvanized is available on request.
Do you install the stair separately from the mezzanine?
No — the stair installs during the mezzanine mobilization with the same salaried in-house crew. No second crew, no second mobilization fee. It's bolted to the mezzanine frame at the top and anchored to the slab at the bottom.
Mezzanine project underway?
Send the stair location + pitch constraint + load expectation. We'll come back with a stamped layout in the mezzanine submittal — same-day reply, no obligation.
60 seconds · no obligation · across the GTA · (647) 692-4416