LOUISVILLE LADDER 14 FOOT FIBERGLASS STEP LADDER, TYPE IAA, 375 POUND Extra Heavy Duty Fiberglass Step Ladder 375 lb. Capacity LOUISVILLE, Fiberglass, 375 lb Load Capacity, Twin Stepladder 36Y449 Amazon.com: Werner SSF03 375 Pound Load Capacity, Type IAA Duty Rating LOUISVILLE, Fiberglass, 375 lb Load Capacity, Stepladder 36Y473 Bailey FS13984 12 Step 3.6m 150kg Fibreglass Double Sided Industrial. Molded top with handyman's tool slots Heavy duty bottom back brace provides additional strength to the bottom of the ladder Spreader braces inside fiberglass rails help keep braces from getting hooked or abused during transit Each step features heavy duty steel gussets secured with large headed, semi tubular steel rivets for maximum strength Vertically mounted U shaped back braces spaced on one foot intervals provide maximum stiffness and discourage unsafe climbing