1/2 inch IPS (bag of 10) Sioux Chief 502 series tube strap shall be used where necessary to fasten or secure IPS tubing and IPS piping in residential or commercial applications. Galvanized steel tube straps. Mount to wood, metal studs or joists using nail or screw in both holes. Minimum recommended nail penetration is 3/4 inch. Refer to National or Local plumbing codes for proper hanger spacing requirements.