Re: [MW:3765] Torque calculation

Torque,in lb.ft=KDP/12

 

K=0.2 for finished bolts;0.22 for Zn Plated;0.3 for black;0.16 for Cd plated;0.15 to 0.18 for lubricated;0.10 for highly lubricated or waxed

D=nominal dia of bolt in inches

P=Bolt's desired load in Lbs(=75% of YSXArea)

A,area=0.7854X Square of (D - 0.9743/n)

n=no of threads pre inch;

Coarse series(UNC) 1/2=13

                              5/8=11

                              3/4=10

                              7/8=09

8UN series 1" onwards=8

Hope above information shall help

Regards

Aarpee

On Sun, Nov 29, 2009 at 11:45 AM, Mrityunjay Kumar / ZS Saudi PEB QA/QC <Mrityunjaykumar@zamilsteel.com> wrote:

Hi,

Good morning,

Can anybody tell me the formulae for Torque calculation (if load & area is provided for Anchor Bolts).

 

 

 Thanks and Regards,

M.K.Choudhary

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