Pre-engineered composite crossover ladders from Fibergrate Composite Structures are available in a variety of heights that address most standard clearances below the crossover (12, 18, 24, 36, 48 and 60 inches). They are constructed from fiberglass-reinforced plastic products that are lightweight and corrosion-resistant. Molded grating and stair treads, both with a meniscus surface, are used for the walking surface and provide slip resistance. Dynaform structural components and Dynarail ISOFR guardrail are used for the structure of the crossover ladder, creating a durable, safe and low-maintenance solution. 800/527-4043; www.fibergrate.com.