How do I know what size and type of screws to use?
The mounting screw is the back bone for the RSIC installation. Choosing the right mounting screw is important and easier then it may appear. The RSIC product mounting screws are tested in a worst case scenario. All fire, sound and structual tests have been conducted with a #8 shank screw. However, the recommended mounting screw shank size is #10 or #12. The RSIC product can accommodate up to a #14 shank size or 1/4" bolt. In wood framing members (walls or ceilings) a minimum of 1-1/2" penetration into the framing member is required. The ferrel in the RSIC is 1" deep, therefore the mounting screw should be a minimum of 2-1/2" over all minimum. Be sure to consult with the screw manufacturer to confirm the screw is capable of supporting a minimum pull and shear of 120# in the specific application. In steel framing the code requires a minimum of three threads to be clear of the metal on the reverse side. Therefore, a 1-1/2" screw length is the minimum recommended. Be sure to consult with the screw manufacturer to confirm the screw is capable of supporting a minimum pull and shear of 120# in the specific application. Be aware in heavy steel framing members there is a danger of causing torque stress fractures in the shank of the screw, if an overly hardened or undersized screw is used. Consult with the screw manufacturer to ensure the screw is specifically design for your application. In concrete applications, see you concrete anchor manufacturer for specific pull and shear information on the anchor type when used in the specific concrete on your project. Drive pins, concrete screws, wedge anchors and deformation anchors all may be used with the RSIC family of products the decision should be confirmed with your fastener manufacturer. Fastener suggestions can be found on the www.pac-intl.com web site. Or call PAC International, Inc. technical support toll free 1-866-774-2100.
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