Using Anchor Bolt Sleeves for Vertical Vessel Foundations

[oengineer]

Could anyone please let me know where it is mentioned to use anchor bolt sleeves for Vertical Vessel foundations? Is it in PIP or ACI? I am trying to find a reference on when to use sleeves for various equipment. I know that API RECOMMENDED PRACTICE 686/PIP REIE 686 talks about using sleeves for pumps & compressors, but I am not aware of where to find its use for vertical vessels.

Comments/suggestions are appreciated.

 

[HTURKAK]

- For vertical vessel foundation , you may look PIP STE03350 Vertical Vessel Foundation Design Guide,
- For general requirements of anchors you may look PIP STE05121 Anchor Bolt Design Guide.

Short answer ;
The sleeves may be required for precise alignment of anchors during installation . Full length anchor sleeves are used when anchor bolts will be pretensioned ( to justify a reasonable stretching length ) in order to keep the bolt under continuous tensile stress if load reversals possible ( for dynamic loadings and also wind , seismic )

I think you may reach the subject documents if you search the web.

 

[oengineer]

- For vertical vessel foundation , you may look PIP STE03350 Vertical Vessel Foundation Design Guide,
- For general requirements of anchors you may look PIP STE05121 Anchor Bolt Design Guide.

Sort answer ;
The sleeves may be required for precise alignment of anchors during installation and full length anchor sleeves are used when anchor bolts will be pretensioned in order to keep the bolt under continuous tensile stress if load reversals possible ( for dynamic loadings and also wind , seismic )

I think you may reach the subject documents if you search the web.

In the Example - Vertical Vessel Foundation Design in PIP STE03350 Vertical Vessel Foundation Design Guide, they use a 4" x 15" sleeve for a 1-1/2" anchor bolt. But I do not see where it says sleeves must be used in this PIP document.

PIP STE05121 Anchor Bolt Design Guide has Table 1 - Minimum Anchor Dimension, which shows sleeve sizes to be used. However the sleeve sizes stop after 1" diameter. This note is also provided:
Partial length sleeves are not recommended for anchors greater than 1 in. See ASCE Anchorage
Design Report, Section 3.2.3.1.

I have not been able to find the subject document in a web search yet.

 

[HTURKAK]

Vertical Vessel Foundation Design in PIP STE03350 Vertical Vessel Foundation Design Guide, they use a 4" x 15" sleeve for a 1-1/2" anchor bolt. But I do not see where it says sleeves must be used in this PIP document.

In this example , the bolts are nonpretensioned so , partial length sleeve is selected. The purpose is for alignment of the bolts however the dia 1-1/2-inch bolts do not bend easily . You are the engineer to decide if partial length sleeve is necessary considering the contructability issues.

PIP STE05121 Anchor Bolt Design Guide has Table 1 - Minimum Anchor Dimension, which shows sleeve sizes to be used. However the sleeve sizes stop after 1" diameter. This note is also provided:
Partial length sleeves are not recommended for anchors greater than 1 in. See ASCE Anchorage
Design Report, Section 3.2.3.1.

I have 2006 version and sleeve sizes provided for all dia. But i agree with the note provided: ( Partial length sleeves are not recommended for anchors greater than 1 in ). one cannot bend easily . The contractors shall install precisely and use templates if necessary.

I have not been able to find the subject document in a web search yet.

Try other search engines .

 

[canwesteng]

PIP are recommendations not requirements. You can decide to use the sleeve or not yourself. I don't believe bending the bolts in a sleever is appropriate for any structural applications, but for small equipment it is standard practice. It is not standard practice to pretension anchor bolts, and you will likely either damage the concrete or fail to achieve the desired pretension in the bolts if you try. You can't use turn of the nut on anchors (have seen this erroneously spec'd before), and you can't really calibrate a torque wrench on them either, so if pretension is really required, you should have a stretch length above TOC on an anchor seat so you can stick on a strain gage or something. If you use DTI washers to torque to structural bolt pretension, you could well cause a concrete bearing failure on the head of the bolts.

If you are designing the structure supporting the vessel, I would recommend oversize holes and shear keys for horizontal alignment. If you are receiving the vessel with feet on it already, I'd see if post installed anchors can work. Both are probably cheaper and easier than installing an anchor with a 15" long sleeve and then bending a 1.5" anchor as needed.

 

[AskTooMuch]

I work in the plant and Ive seen this installed many times. It's more needed for pump or compressor because they normally don't have template. Vertical vessels specially big vertical vessel, fabricator should supply anchor bolt templates.