Question

A steel rod of 22 mm in diameter has been used as a tie in a bracing system, but may subjected to possible reversal of stress due to wind. The maximum permitted length of the member is______.

• A. 2700 mm
• B. 2015 mm
• C. 2235 mm
• D. 1925 mm

Answer 1

The correct option is D 1925 mm

Radius of gyration steel rod,
$r=\frac{D}{4}=\frac{22}{4}=5.5mm$

$\because$ Tie is a tension member and for reversal of stress, the maximum permissible slenderness ratio

$\lambda (=\frac{l}{r})=350$

$\therefore$ Maximum length of member permitted
$=350\times 5.5=1925mm$