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10179420_305 E. 4TH - Plan
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10179420_305 E. 4TH - Plan
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Last modified
5/7/2021 3:45:37 PM
Creation date
10/25/2020 5:16:04 PM
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Plan
Permit Number
10179420
Full Address
305 E Fourth St
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structure system and its dynamic impact.Thus T = C= 1/4 (32 x 32 x 16)/cos 0= 4.72 kips t. : <br />Assume the diagonals to be tied to each column at 4 feet spacing Fig. 9 and the correspondingefFective length KL= 5 R., i.e.: <br />KL = 60 in. <br />using tube of 0 - 2 in. and 1 = 0.125 in. <br />A = 0.736 inz <br />r = 0.663 <br />KL/r -90 <br />i = 12.3 ksi <br />P, = 9.05 kips, i.e. S.F. = 1.92 6// <br />which is considered to be acceptable <br />Herein, the corner diagonals are provided for any area of-approximately 1000 sq.ft. (32)02)ft.or less. Beyondthis limit_,0-*onal_diagon&1#.,r.e.provided.along *e_sides.or preferably-at-the middleas outlined forthe examples outlined in Fig:1. 60-/1¢0 040 svist AP..- 61¥to'¥.i' L.4, 4%1'.0le·*04'\SThe middle bracing will be arranged between two adjacent columns as shown# Fig. f-3Herein, the:capacity of one diagonal at KL - 7 ft> 84 in. <br />. CtKI./r= 127, Fb= 6.2 k.si - - <br />Pb = 4.6 kips, F. = 2.4 kips <br />Allowable horizontal force for each bracing = 1400 lb. <br />-/Consider contribution from area over 1000 W to have reduced horizont81 component= 16 x 0.7 <br />- 11.2 psf <br />Area corresponding to a pair ofdiagonal bracing = 1400/11.2 = 125 ff <br />1
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