Ladder rung crack during fabrication

[TracyStruc]

I have a project that uses the ladder rung detail as shown in the attachment.

The ladder rung fabricated shows cracks at the bend and the test report states the bend radius is too small for the 1" diameter bar.

This detail is widely used on many projects. Has anyone seen this problem before? What is the solution?

Thanks.

 

[dik]

What is the bend radius? Do you need a 1" dia bar? Do you have the chemical properties for the bar to see if it is weldable?

Dik

 

[JStephen]

Increase the bend radius, change the type of steel, bend hot, anneal. I think you can buy steps like that also.

 

[oldestguy]

I did a search for man hole steps as well as man hole ladder and a few makers came up. Seems like an easier way than the bends specified.

 

[TehMightyEngineer]

We use these polypropylene steps (attached). Works great, easy to install either in cast-in-place or precast, chemically resistant.

Ian Riley, PE, SE
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

https://www.facebook.com/AmericanConcrete/

 

[dik]

looks like a great product... Dik

 

[mreg]

TracyChen,

I believe you only need a 3/4" diameter bar per code. Reducing the diameter would definitely help reduce deformation at bending. I've seen 3/4" weldable re-bar used quite often.

Is the downward bend to prevent feet from slipping off?