Minimum anchor bolts for saddles 1

[JStephen]

For larger saddle-supported vessels, the saddles normally have provision for anchor bolts. But, in many cases, the anchors aren't actually required for wind or seismic action. In this case, the recommendation is "If Qo > QL, then no uplift occurs, and the minimum number and size of anchor bolts should be used." But, I'm not finding anything that specifies a minimum number or size. Do you know of any code or standard or even rule-of-thumb that specifies what the minimum anchorage is when not actually required for loading?

 

[r6155]

See PIP standard VEFV 1104, 1105 and 1106 saddles.

Regards

 

[JStephen]

Thanks, r6155, just what I was looking for.
For future reference, these three drawings are now included in a VEFV 1100 document which can be found online or by paying $$$.
They show 1" or 1-1/4" size for the saddles of interest.

 

[Some Curious Guy]

I agree with r6155 response. PIP is the most widely referenced standard in USA and Gulf region. Every region , country or client would have something you can refer. However most of the time the saddle to base friction force due to thermal expansion will govern anchor bolt size. Please check if the selected anchor bolt size are sufficient for that.

 

[saplanti]

Please note that anchor bolt are used to take shear forces from thermal expansion, wind/earthquake in addition to uplift, and control thermal expansion.