Won Door and pocket receiver for won door.

[Builder Bob]

Currently reviewing a won door being installed as a three hour opening protective between wings of a school - Fire wall cut buildings in half for area limitations. The termination wall has a recessed pocket receiver that cuts the depth of the 8 inch blow down to 3 5/8" thickness if filled solid with grout - Calculated fire resistance of the IBC indicates that this is only good for 1 3/4 hr. rating at this point. The Evaluation report from ICC indicates that the door and related materials have been tested for the time periods listed - The fire door (won door) is slightly offset and terminates into a 8 inch block wall that will carry a 3 hour rating UL U904.




Am I really just overthinking this?

Builder Bob

 

[cda]

Good question!!!

1. Does won door give any installation guidance, at that point??

2. Does the door it self provide thevrating??? At that point

 

[cda]

Provide rated construction on each side corresponding to rating required for opening by others. (Note: 1 hour condition shown. To view additional rated conditions, visit our website @ www.wondoor.com)
2. Sliding jamb assembly.



http://wondoor.com/cmsdocuments/design_manual_2010Rev8.pdf

 

[steveray]

Fatten out the masonry on the backside? If it doesn't terminate to the face of the assembly with a 3hr joint, I think you are absolutely on the right track to ensure that the rating is maintained at the "penetration"...

 

[Builder Bob]

Thanks CDA - I couldn't find the information you provided initially..... The answer is in section 2.04(D).

 

[cda]

I have not won-Doored in years

And never thought about the rating where it stops

Anyway have fun