*Posted on behalf of a Hilti customer
I recently approved a submittal from Hilti to allow the use of shot pins to attach the roof deck on a project. How do I know if the pins have been installed correctly?
Dear customer,
Thank you for your question. There are three main characteristics of proper fastenings that must be considered:
1. Fasteners installed in proper locations. The fasteners must be installed in the proper steel deck valleys or flutes in accordance with the structural roof and floor deck plans and design, and in the proper location in the base steel (Reference Section 3.5.1.2.3). The fastener point must penetrate into, but not necessarily through, the supporting steel (top chord or flange), depending on the fastener/deck/base steel configuration.
2. Clamping of fastened part to base material.
The fasteners must clamp the steel deck down to the base steel (top chord or flange). There should not be any visible
gaps between the steel deck and the base steel or between steel deck laps.
3. Washer placement and condition. In general, the fastener washer edges must be clamping the steel deck sheet to the base steel. The washers should not curl upwards away from the deck surface and must not be digging or cutting into the steel deck surface. Reference the attached excerpt from our 2015 Direct Fastening Technical Guide, section 3.5.1.2.4 Fastener Inspection. Don't hesitate to contact us if there is anything else we can do for you.
Kind Regards
Jerrod