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9/8/98 AC 43.13-1B THE NUMBER OF RIVETS REQUIRED IN EACH LEG ON EACH SIDE OF THE CUT IS DETERMINED BY THE WIDTH “W,” THE THICKNESS OF THE FRAME “t,” AND THE RIVET DIAMETER “d” USING TABLE 4- 10 IN A MANNER SIMILAR TO THAT FOR STRINGERS IN FIGURE 4- 20. NOTE b. IN TABLE 4-10 INDICATES THAT ONLY 60 PERCENT OF THE NUMBER OF RIVETS SO CALCULATED NEED BE USED IN SPLICES IN INTERMEDIATE. EXAMPLE: (FOR 2017-T3 aluminum alloy frame) FLANGE LEG t = .040” d = 1/8” 2117-T4 (AD) W1 & W 3 = .6 inch NO. OF RIVETS PER INCH OF WIDTH FROM TABLE 4-10 = 6.2 No. of rivets required = W x 6.2 = .6 x 6.2 = 3.72 or 4 rivets. 60 percent of 4 rivets = 2.4 rivets. USE 3 RIVETS ON EACH SIDE OF THE CUT IN EACH FLANGE LEG. WEB OF ZEE (OR CHANNEL) t = .040” d = 1/8” 2117-T4 (AD) rivet W = 2.0 inches NO. OF RIVETS PER INCH OF WIDTH FROM TABLE 4-10 = 6.2 No. of rivets required = W x 6.2 = 2.0 x 6.2 = 12.4 or 13 rivets. 60 percent of 13 rivets = 7.8 rivets. USE 8 RIVETS ON EACH SIDE OF CUT IN THE WEB OF ZEE (OR CHANNEL). “L” SHOULD BE MORE THAN TWICE W2 Thickness of splice plate to be greater than that of the frame to be spliced. FIGURE 4-20. Example of intermediate frame stringer splice (material 2017-T3 AL alloy). Par 4-62 Page 4-41PDF Image | AFS-640
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