Anchor bolts required tightig torque

[Mohamed Maher]

Dear all,

For anchors bolts in a base plate (fixed base)
For small structure(fabric sail tent) is it enough to make anchor bolts snug tighting or it required torque ..af it required the anchor grade is 8.8 which is not exists in design guide 1 can we consider it as grade F1554 grade 105 and to use table A.1 then use the equation
Tv= 0.12 db Tm

Thanks
Mohamed

 

[HTURKAK]

Preloading of anchor bolts is necessary in case of fatigue is concern ..( vibrating machines etc..) and the anchor bolt shall have a sleeve in order to stretch the bolt..

Excerpt from ANCHORAGE DESIGN FOR PETROCHEMICAL
FACILITIES

In your case if there is no vibration and fatigue is not a concern, snug tight is OK..













I cannot give you the formula for success, but I can give you the formula for failure..It is: Try to please everybody.

 

[Mohamed Maher]

Thanks HTURKAK,
But I can also use pre loading for anchor.
So if I'll use torque for the anchor..
Sleeve should be exisit or it's not a must.
Thanks again
Mohammed