How Many A325 Bolts to Spot Check 4

[cap4000]

Does anyone know the percentage of bolts to spot check on a structural steel building. Any tips will be greatly appreciated.

 

[kelowna]

I an sure it is somewhere in the standard. I use 10%

 

[abusementpark]

Do you mean on a site visit?

 

[Ron]

cap 4000...I use 10% of the connections, checking each bolt in that particular connection. There are no standards for that, but it's consistent with other test and observation frequency in construction.

 

[connectegr]

Type of framing will impact the estimate. Braced frames have many more bolts than welded moment frames.

http://www.FerrellEngineering.com

 

[gtaw]

Were the bolts tested (preinstallation verification testing) on-site by the erector as per RCSC?

What type of connections are they; Slip critical, snug tight, pretensioned?

Is this an existing structure or are you checking the bolts during erection?

Check the recommendations of the RCSC for arbitration inspection. I believe you can get the RCSC on line.

Specification for Structural Joints Using ASTM A325 or A490 Bolts

It is like the Prego spaghetti sauce commercial - "It's in there."


Best regards - Al

 

[connectegr]

Sorry I miss understood the question. Percentage of bolts to be field inspected.

Prior to installation, for pretensioned installation, a sample of not less than three assemblies of each type (diameter, length, grade, lot), shall be tested before installation.

During construction...
snug-tight connections - shall be visually inspected to verify that all plies are in firm contact.

pretensioned connections - RCSC requires "routine" observation of the installation method selected.

If it is determined after installation that proper pretensions have not be been obtained, additional procedures are given in the Arbitration section of RCSC.

Additional inspection guidelines can be provided within the contract documents.

http://www.FerrellEngineering.com