74 HANDBOOK OF MECHANICAL DESIGN 



SHAPE FACTORS FOR FORMED ALUMINUM COMPRESSION MEMBERS (Continued) 



Shape 



-J ^ k- ' 



1'^ r , I 



r*r*i K"H 



V 5"/' 



6 



-Azr- Vs- c//'am. liqhtening 

 ^' " hole, pifch 2f 



tiD4 



Afeffective)=A jp- 



A= Area wiihout hole 

 D= Diam. hole; P=pi+ch 



Material 

 aluminum 



17ST 



17ST 



Test 

 L/p 



27-35 



End 

 condition 



Flat 



Flat 



it at test 



23 at L/p = 

 bb 



Ko 



a, lb. per 

 sq. in., at 

 test L/p 



43.000 



19.0 



30,000 



at L/p = 55 



Test, yield 

 point, lb. 

 per sq. in. 



40 , 000 



44,000 



17 ST 



35.4 



Flat 



34,500 



41,000 



H"-t 



/ ^ holes 

 '' 8 rivets, P=/' 



17ST 



Length = 

 24 in. 



Flat 



2%/W 



29.6*/"' 



32,000 



About 

 40,000 



I Flat shee/ simply 

 [supported on edges 



-\— W — 



_i 



Bu reou of S+ds. tesfs 



■Ko = K X 



33 1 



f aMoTooo 



V: 



32,000 



