Safety Rail's Self-Closing Gates add an additional level of safety and controlled access. All gates have adjustable widths and, with the proper hardware, can be mounted to round posts, square posts, flat posts, doorways and walls. Applications Designed to be used at points of access within a guardrail system (such as ladderways) to prevent unintentional exit or entry into the access opening such as: -Ladders -Stairways -Work Access Platforms -Loading Zones Minimum Requirements Requires sound substrate for mounting gates capable of supporting 200 lb point load on railing system. Product Specifications Designed in accordance with OSHA Standards (29 CFR 1910.29) Tested for 200 lb (90.7kg) force in a downward or outward direction. Assembled height: 42″ (107cm) top rail, 21″ (53cm) mid rail. 302 stainless steel torsion springs. Gate body material: 3/16″ sheet metal or 304 stainless steel. Gate arm material: 1" x 14 guage square tube Each size has 6" of adjustment. 100% Made in USA. American Welding Society Certified (AWS D1.1 & D1.3)