TABLE 118. 

 .NEW STANDARD CONNECTIONS FOR BEAMS AND CHANNELS. 



AMERICAN BRIDGE COMPANY. 



5W 



21" 



2%" 



n 



-$] 



*"3- 



i-,4- 



-- -- 



*- y * f^ ^> I ==a c. ^ ' ^^ ^^ i ^ 



2 Angles 4'Jt4x^"x 1-SMi" ZAnglea 4x4'x^!>l ! 6^" aAngles 4'x4"x Vzd-ZVz ZAngles 4"x4'x^gxO-ll'/2" 



jjj" __ Rivets and bolts-%"diam. 



rf 



C^ r - -^* r ^ ^fc -a r ^^ ^*- 



2 Angles 4'x4'x'^e'xO-ll 1 /2' 2 Angles 4'x 4"x^gx o'-8^' 2 Angles e'U'x^'xO-S 1 /^' 2Anjfles6"x 4x%"xO-3" 



LIMITING VALUES OF BEAM CONNECTIONS. 



I Beams. 



Value of Web 

 Connection. 



Values of Outstanding Legs of Connection Angles. 



Field Rivets. 



Field Bolts. 



Depth, 

 Inches. 



Weight, 



Lb. Per 



Foot. 



Shop Rivets 



in Enclosed 



Bearing, 



Pounds. 



%" Rivets or 



Turned Bolts, 



Single Shear, 



Pounds. 



Min. Allow- 

 able Span in 



Feet, 

 Uniform Load. 



%" Rough 



Bolts, Single 



Shear, Pounds. 



Min. Allow- 

 able Span in 



Feet, 

 Uniform Load. 



27 

 24 



24 

 21 

 20 

 18 



18 



12 

 12 

 IO 

 IO 



9 



83 



80 



69* 



r 



42 



36 



3if 

 275 

 25 



22 

 21 



18 

 17* 



s* 



9t 



66,800 

 67,500 

 52,700 

 40,200 

 45,000 

 41,400 

 29,000 

 36,900 

 26,000 

 23,600 

 17,200 

 27,900 

 20,900 

 26,100 

 24,300 

 18,900 

 11,300 

 10,400 

 9,500 



61,900 



53>ooo 

 53,000 

 44,200 

 35.300 

 35,300 

 35,300 

 35,3oo 

 35,300 

 26,500 

 26,500 

 17,700 

 17,700 

 17,700 

 17,700 

 17,700 

 8,800 

 8,800 

 8,800 



18.4 



17-5 

 16.3 



15-5 

 17.6 



13-3 



15-0 

 8.9 



n. i 

 8.1 



10.3 

 74 

 6.9 

 5-7 

 4-3 

 4.4 

 6.2 

 4.4 

 2.9 



49,500 

 42,400 

 42,400 

 35,3oo 

 28,300 

 28.300 

 28,300 

 28,300 

 28,300 

 21,200 

 21,200 

 .14,100 

 14,100 

 14,100 

 14,100 

 14 loo 

 7,100 

 7,100 

 7,100 



23.1 

 21.9 



2O.2 

 I 7 .6 

 22.1 

 16.7 



15-4 

 II. I 

 II. I 



9.0 

 IO-3 



9.2 



8.6 

 7-i 

 5-4 

 5-5 

 7.8 



ALLOWABLE UNIT STRESS IN POUNDS PER SQUARE INCH. 



Single 

 Shear 



Rivets Shop 12,000 



Rivets and Turned Bolts. Field 10,000 

 Rough Bolts Field 8,000 



Bearing 



Rivets enclosed Shop 30,000 



Rivets one side Shop 24,000 



Rivets and Turned Bolts . . .Field 20,000 

 Rough Bolts Field 16,000 



t = Web thickness, in bearing, to develop max. allowable reactions, when beams frame 

 opposite. 



Connections are figured for bearing and shear (no moment considered). 



The above values agree with tests made on beams under ordinary conditions of use. 



Where web is enclosed between connection angles (enclosed bearing), values are greater 

 because of the increased efficiency due to friction and grip. 



Special connections shall be used when any of the limiting conditions given above are 

 exceeded such as end reaction from loaded beam being greater than value of connection; 

 shorter span with beam fully loaded; or a less thickness of web when maximum allowable 

 reactions are used. 



236 



