# Design of suitable pin size

BIGEYE
Appreciate if someone can check my answers to the following question:

A beam hinged at one end and simply supported at the other is subjected to the loading shown. A design calculation is required to determine the suitable size of hinge pin. If wrong, could you point me in the right direction.

Data Shear strength of pin material = 20 MN/m^2
Factor of safety = 5

Drawing of system can be found here:

http://img206.imageshack.us/img206/6549/oc2q3gc5.jpg [Broken]

a) Use these conditions to determine the reaction forces RP and R1

b) State the maximum working shear stress in the pin.

c) Calculate a suitable diameter for the pin to the nearest millimeter.

a) My answers are RP = 1700 N, and R1 = 800 N.

c) My answer = 16 mm

Last edited by a moderator:

Homework Helper
Gold Member
Appreciate if someone can check my answers to the following question:

A beam hinged at one end and simply supported at the other is subjected to the loading shown. A design calculation is required to determine the suitable size of hinge pin. If wrong, could you point me in the right direction.

Data Shear strength of pin material = 20 MN/m^2
Factor of safety = 5

Drawing of system can be found here:

http://img206.imageshack.us/img206/6549/oc2q3gc5.jpg [Broken]

a) Use these conditions to determine the reaction forces RP and R1

b) State the maximum working shear stress in the pin.

c) Calculate a suitable diameter for the pin to the nearest millimeter.

a) My answers are RP = 1700 N, and R1 = 800 N.

c) My answer = 16 mm
Your answers look correct to me. The pin is in a classic case of double shear.

Last edited by a moderator:
BIGEYE
Thanks for taking the time.

komy
Determine Pin Size?

Your answers look correct to me. The pin is in a classic case of double shear.

hey guys .. I am just wondering how you went about calculating the maximum shearing stress in the pin, and from that determining pin size ...

your help would be of most value ..

Homework Helper
Gold Member
hey guys .. I am just wondering how you went about calculating the maximum shearing stress in the pin, and from that determining pin size ...

your help would be of most value ..