Crossovers

A crossover platform is a fixed stair-and-bridge structure that carries workers over rooftop obstructions such as pipe runs, conduit, ductwork, parapets, and changes in roof level. Guardrail on both sides keeps the worker on a compliant walking surface instead of stepping on or over the obstruction, which protects the worker and the equipment underfoot at the same time. OSHA treats the crossover as a walking-working surface, so its treads, landings, and rails are designed to 29 CFR 1910 Subpart D criteria. Tritech engineers each crossover to the specific obstruction and roof, with non-penetrating bases where the membrane cannot be breached.

Under 29 CFR 1910 Subpart D, an elevated platform requires fall protection when a side or edge is 4 feet or more above a lower level (29 CFR 1910.28(b)(1)), and guardrail is the standard control: top rail at 42 inches, plus or minus 3 inches, withstanding 200 pounds of outward or downward force (29 CFR 1910.29(b)). A rooftop crossover meets those standards passively, because the guardrail is part of the structure rather than an add-on.

OSHA’s general industry standard requires fall protection at 4 feet above a lower level (29 CFR 1910.28(b)(1)); construction work triggers at 6 feet (29 CFR 1926.501(b)(1)). A crossover often guards a shorter fall, the stumble over an obstruction, but the same structure keeps workers on a protected path where a parapet or roof-level change puts them past the trigger.

Yes. Any walking-working surface with an unprotected side or edge 4 feet or more above a lower level is a fall exposure the employer must protect (29 CFR 1910.28(b)(1)). That includes the top of a crossover bridging a roof-level change, which is why compliant guardrail runs the full path: stairs, bridge, and landings.