Rigid Insulation Structural Values

[ars001]

Does anyone have any allowable bending stress values for rigid insulation? Thanks

 

[JStructsteel]

Seven seems about right, but I have gone as high as 7.5

what is your application for the question, enquiring minds want to know

 

[MiketheEngineer]

Talk to the mfg??

 

[ars001]

Well, long story short. I have a situation where I'm supporting about 6" of soil from going underneath a continuous grade beam (washing underneath the grade beam) with rigid insulation. I just want to make sure it won't snap off.

 

[JStructsteel]

I bet it will be quicker to get a piece and test it yourself than talk to the MFG. How long of a cont. piece is this? why is the footing being washed away?

 

[NKT]

I wouldn't count on any strength from the insulation: it is very easy to damage, and once it's damaged it has just about zero bending strength.