This Bunk Bed Frame adopts a square frame structure to make the bed frame more stable, the maximum bearing capacity can reach 400 pounds. This Bunk Bed Frame with strong security guardrail to ensure your safety, the recommended use of 4”-6” mattress thickness. Make sure the top of the mattress is at least 5 inches from the edge of the guardrail. The bunk bed design effectively utilizes vertical space and releases the space in your bedroom. The 12.4 inches underneath provides you with seasonal clothes or sundries. The plastic buckle design can fix the slats firmly to prevent the noise from moving slats. All labeled pieces, tools, and instructions are smartly packed in 1 box. Recommended installed by two people in 40 min.