! j I I - National Roofing Contractors Association

479material that is so tough it even resists corrosion in freezers, high-humidity environments, and air plenum situations. Predrilling is requiredin application. The N-C fastener does not rely on frictional drag of its threads against the metal for back-out resistance. Once tightened,the fastener spreads below and above the deck to act as a pop rivet to secure it in place. This fastening system is even more essential whendealing with a thin-gauge metal or weak wood deck. Check with manufacturer for availability for wood decks.For Toggle-Less With and Without Wires, predrilling is required for installation. Pullout tests are required for each installation becausepullout resistance will vary from one deck to another.9. OLYMPIC MANUFAcruRING GROUP, INc.For Olympic wood deck fasteners; 1/2-inch penetration is required through plywood.The Con-Tite nail is installed by drilling into pre-