[. . . ] Direct Fastening Systems X-FCM & X-FCP Grating & Checkerplate 3. 6 3. 6. 4 Installation Instructions Threaded stud placing X-CRM8-15-12 h ET = 12 ± 2 mm hNVS = 18 ± 2 mm t II 6 mm Tightening torque Tmax = 4. 5 ft-lb (6. 1 N-m) for X-CRM8 and EM8 studs. [. . . ] grating height = L + 7 hhNVS NVS hET hnom th II Governing requirement: · Minimum 2 mm clearance between X-FCM and surface of base steel to allow for deflections Governing requirement: · Minimum 5 mm thread engagement at the minimum allowable standoff, hNVS. The maximum grating height for an X-FCM type can be extended if hNVS is tightly controlled, e. g. at 18 mm instead of 16 mm. EM8-15-14 hnom = 14 ± 2 mm hNVS = 18 ± 2 mm t II 6 mm 2 Example: X-FCM 25/30 Min. = 23 + 7 = 30mm hhET nom Note: · hhNVS NVS Grating height of 32 can be accommodated if hNVS 18 mm X-BT M8-15-6 SNR12 hNVS = 15. 7 - 16. 8 mm t II 8 mm th II Installation procedure for bar grating 1. Tighten the disk, without exceeding maximum tightening torque t II hNVS 30 hNVS NVS 1 Reference Section 3. 5. 4 for more details on proper installaton of X-BT fasteners. Hilti, Inc. (US) 1-800-879-8000 | www. us. hilti. com I en español 1-800-879-5000 I Hilti (Canada) Corp. [. . . ] 1-800-363-4458 I www. ca. hilti. com I Product Technical Guide 2006 47 L DX 750 1234 R [. . . ]