Twin Triple Bunk Bed by Chelsea Home Actual product weights may vary based on the thickness of wood used. With any wood products, expect some deformities and knots that come natural. Metal brackets are used to connect the rails to the headboard and footboard. The rails include a 1.25" cleat, which is glued and screwed to the rail for extra strength, to support the mattress foundation. Each solid wood drawer is mounted on a rolling metal glide for easy opening and closing. Includes slat pack(s) Solid pine construction for strength and durability which can hold up to 400 lbs of distributed weight. Rails are 1.25"x5", thicker and more durable than most competitor models. All bunk beds and beds are tested by Federal Safety Standards which require 400 pounds to be placed in the top bunk, on top of the mattress foundation. &nbsp;The weight of the upper and lower beds should not exceed 250 people pounds.