The Floor Joist Safety Bar follows the same design principles of our Safety Bar but is designed to be installed onto engineered 2x4 floor joists. Providing fall protection during the truss installation and decking operations is difficult to accomplish. This product spans 3 trusses, locks securely in place with locking detent pins and can be moved quickly when needed. 2 users can tie off to this product when using an energy absorbing lanyard or SRL's. Super Anchor Safety heavy duty safety bars are built with 1/8 in thick powder coated steel for durability and long service life. Fixed or adjustable legs are perfectly centered to fit 12 in, 16 in and 24 in joist/truss spacing.