ROLLING STAIRS

Heavy-duty for Very Narrow Aisles (VNA)
with the world’s tightest turning radius

Why Prostep

Built to work where other rolling ladders can’t

In a world dominated by welded, fixed-form units, Prostep takes steps in a new direction.

Compact footprint & tight turning radius

With a tight turning radius and compact footprint, access equipment, corners, and very narrow aisles that other rolling ladders can’t reach. Warehouse floor plans are aisle-constrained; conventional rolling ladders are built for wide-aisle forklift lanes and cannot physically maneuver in tighter classes.

Stability & safety interlock

Lift-and-Lock

The integrated handle lifts the pivoting casters and locks the rubber-footed base — rolling the ladder from rock-solid to rock-solid in one motion. The unit is secured to the floor by the base, not by locking casters. While the casters are lowered, making the unit mobile, the handle safely prevents the unit from being climbed.

CAPABILITY EXTENSION

INDUSTRY’S LARGEST WORK PLATFORM

Choose 6 or 9 sq. ft. of standard workspace, then add a 1′ or 2′ cantilever kit to expand the platform up to 15 sq. ft. and reach over equipment and obstructions.

Safety & Compliance

ProStep is built to OSHA 29 CFR 1910.23(e) and ANSI A14.7 — the standards your facility is already audited against.

Steps

16″ minimum step width, slip-resistant serrated aluminum treads, and platform.

Stringer

Stair slope not more than 60° from horizontal.

Capacity

Structure and casters rated to at least four times the maximum intended load.

Movement

Rubber-footed base plants the unit on the floor with the wheels off the load path when occupied.

Guarding

42″ handrails with midrail and full toe board around the work platform.

OSHA

29 CFR 1910.23(e)
Mobile ladder stands

ANSI

A14.7
Mobile ladder stands & platforms

1910.29

Guardrail systems
200 lb top-rail load

USA

Engineered, built &
supported domestically

Aisle-fit finder

Find your size

Every ProStep model lists its 360° turning radius. No guessing whether the unit will physically fit.

Fits with clearance Fits — tight Won’t fit

Model	HeightPlatform	360°Turning radius	VNA Very Narrow Aisle 5–6 ft	Narrow Aisle8–10 ft	Wide Aisle11–13 ft
PS-40	40″	64″ (5.3 ft)	✓	✓	✓
PS-50	50″	70″ (5.8 ft)	~	✓	✓
PS-60	60″	76″ (6.3 ft)	—	✓	✓
PS-70	70″	81″ (6.8 ft)	—	✓	✓
PS-80	80″	87″ (7.3 ft)	—	✓	✓
PS-90	90″	93″ (7.7 ft)	—	✓	✓
PS-100	100″	99″ (8.2 ft)	—	~	✓
PS-110	110″	104″ (8.7 ft)	—	~	✓
PS-120	120″	110″ (9.1 ft)	—	~	✓