BEAMS AND STRUCTURES 

 SHAPE FACTORS FOR FORMED ALUMINUM COMPRESSION MEMBERS 



73 



Shape 



K-/5- 



pitch 



"^Ah 



0.052 



\.- 0.025- 0.080 

 r 



0.25 . 



,TJ 



iO.J75" 



L=575 



R=4i' < , 



Rivets spaced 

 "^ at i"in double 

 row 



Wood block 

 (not bearing at ends] 



U-lf-A L=/0 



Y '2 1 0064 fo 0128 



Woodblock 



(not bearing (][) ^^^Qg^red , 

 at ends) ^ 



\KKIVt 



Rivets at I 

 'pitcfi, =; 



<N 



Material 

 aluminum 



24ST 



24ST 



Test 

 i/p 



<25 



<25 



End 

 condition 



Flat 



Flat 



Flat 



K at test 



a, lb. per 

 sq. in., at 

 test L/p 



48.000 



59 . 800 



50,000 



Test, yield 

 point, lb. 

 per sq. in. 



50,000 



/ 2 R (inside) 



( > J 

 ( ) 1 



45,000 



46 , 000 



C^- 



24ST 



'-r- 



nc 



^■ICO 



<25 on 5a 



and 56 

 From 15 to 



70 on 5c 



Flat on 5a 



and 56 

 Knife on 5c 



(a) 14.3 

 (6) 22.6 

 (c) 15.4 (at 

 L/p = 15) 



(a) 14.3 

 (6) 22.6 

 (c) 14.5 



(a) 52,000 

 (6) 52,000 

 (c) 55,000 



(at L/p = 



0) 



(a) 50,000 

 (6) 50,000 

 (c) 50,000 

 (avg.) 



"0.0/6 



aandb <^ g S^ 



i^-^to' Rivet at 2 "pitch 

 on 5a, b and c 



o/i 5 b 



X 5c 



■W 



— P 



H 



~ ~ ~ Stiorf blocks, g gaps 



Noted 



(a) and (6) 

 flat 

 (c) knife 



(a) 22.6 

 (b; 32.6 

 (c) 32.0 (at 

 L/p = 15) 



(o) 22 , 6 

 (6) 32.6 

 (c) 32.0 



(a) 44,300 

 (6) 48,200 

 (c) 53,000 



(o) 47,000 

 (6) 50,000 

 (c) 52,000 



