Rebar Size vs. Stirrup Count: What's Often Overlooked?

[jar546]

In concrete beam design, let's not forget that stirrups are as crucial as longitudinal rebar, especially for resisting shear forces. To the inspectors here: have you noticed more contractors cutting corners with the size or number of the longitudinal rebar or reducing the number of stirrups due to a misunderstanding of their importance?

Click on the image to expand it.

 

[classicT]

Idk, but the radius on the outside corner bar appears to be really tight and non-uniform. Field bent perhaps.

 

[Msradell]

Idk, but the radius on the outside corner bar appears to be really tight and non-uniform. Field bent perhaps.

View attachment 12550

It certainly looks like it was a field bend. Either that or a shop that didn't care about uniform bends.

 

[jar546]

How about we get back on topic as though there was no photo for the easy distraction posts? I should have made this post without a picture.

 

[Mr. Inspector]

In concrete beam design, let's not forget that stirrups are as crucial as longitudinal rebar, especially for resisting shear forces. To the inspectors here: have you noticed more contractors cutting corners with the size or number of the longitudinal rebar or reducing the number of stirrups due to a misunderstanding of their importance?

Click on the image to expand it.
View attachment 12533

No

 

[classicT]

How about we get back on topic as though there was no photo for the easy distraction posts? I should have made this post without a picture.

Sorry Jar, my bad...

To the inspectors here: have you noticed more contractors cutting corners with the size or number of the longitudinal rebar or reducing the number of stirrups due to a misunderstanding of their importance?

To answer your question, no. Never seen it, not even a single time. But you asked a very specific question that pre-loads the condition of intent by the contractor. Have I seen undersized bar or insufficient reinforcement? Yes! All the time. But more often it was a simple mistake, short supply/delivery, error b/w shop drawings and engineering design, etc.

 

[steveray]

No...plenty of other errors...

 

[ICE]

To the inspectors here: have you noticed more contractors cutting corners with the size or number of the longitudinal rebar or reducing the number of stirrups

No.

 

[ICE]

due to a misunderstanding of their importance

You are making an assumption.

 

[Msradell]

Assuming the shop drawings indicate the correct spacing and quantity of stirrups to contractors going to have some explaining to do if he has some of them left over. On the same basis, that shop is responsible for the correct sizes of Bars based on the shop drawings, not the contractor in most cases.