According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

According to I.B.R., the efficiency of a double riveted butt joint wi

1.	According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be
A.	45 to 60%
B.	63 to 70%
C.	70 to 83%
D.	80 to 90%
Answer» D. 80 to 90%

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According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

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