DS 2-8 Earthquake Protection for Water-Based Fire ... - FM Global

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2-8 Earthquake Protection Page 56 FM Global Property Loss Prevention Data Sheets H,I,J-lateral 6 (150) 2 (50) N,O,P-lateral 4 (100) 2 (50) 1x40x23.0x0.5 = (1 x 12.2 x 338 x 0.5) = 4 x 100 x 4.2 x 0.5 = (4 x 31 x 62 x 0.5) = = = 1x40x11.8x0.5 = (1 x 12.2 x 173 x 0.5) = 4 x 100 x 4.2 x 0.5 = (4 x 31 x 62 x 0.5) = = = 460 lb (2062 N) 840 (3844) 1300 lb (5906 N) 236 lb (1055 N) 840 (3844) 1076 lb (4899 N) (Braces H, I, J, N, O and P are lateral braces at maximum 40 ft [12.2 m] spacing, with crossmain/branchline portions and design loads as indicated.) R,S-longitudinal T,V-longitudinal U, longitudinal 6 (150) 4 (100) 4 (100) 1x80x23.0x0.5 = (1 x 24.4 x 338 x 0.5) = 1 x 67.5 x 11.8 x 0.5 = (1 x 20.6 x 173 x 0.5) = 1x55x11.8x0.5 = (1 x 16.8 x 173 x 0.5) = 920 lb (4124 N) 398 lb (1782 N) 325 lb (1453 N) (Braces R, S, T, U, and V are longitudinal braces for crossmain portions, with the design loads indicated. Spacing between brace locations is nonuniform for the near and far crossmains because of the use of Brace E for a part of the longitudinal bracing for the near crossmain.) C.2.2 Looped System (System No. 2) Step 1. Layout and orientation of braces. Fig. 26 shows the layout of the two-way lateral braces, and a four-way brace at the riser. Fig. 27 shows the layout of the two-way longitudinal braces. Dashed lines indicate the portion of the piping system (zones of influence) to be calculated for each bracing location. ©2010 Factory Mutual Insurance Company. All rights reserved.
Earthquake Protection 2-8 FM Global Property Loss Prevention Data Sheets Page 57 Fig. 26. Layout and zones of influence for lateral and four-way riser sway bracing for System #2. Fig. 27. Layout and zones of influence for longitudinal and four-way riser sway bracing for System #2. ©2010 Factory Mutual Insurance Company. All rights reserved.
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DS 2-8 Earthquake Protection for Water-Based Fire ... - FM Global

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