Project is a steel framed mezzanine within a double height suite on the ground floor of a Type I-A building.
Primary structural elements are 3 hours and floor is 2 hours. Client of course wants it to look like the beautiful rendering that the designer made showing essentially exposed steel profiles.
The support columns are 3.5 x 3.5 x 1/4" and i am exploring fireproofing options.
Intumescent fireproofing looks the best but cost is very high.
cementitious fireproofing needs to be nearly 3" thick for this member size and thickness. then wrapped in something to make it look acceptable. gyp, or break metal. columns get to large and clunky.
We have seen some discussion of concrete filled tube steel columns but nothing that seems like it is tested and approved? anyone have any experience with this?
Straight gyp wrap looks like 5 layers of 5/8" gyp to achieve 3 hours on this post. to bulky again.
Anyone have any other suggestions how to minimize the size of the post once protected?
My recommendation of heavy timber falls on deaf ears.
Primary structural elements are 3 hours and floor is 2 hours. Client of course wants it to look like the beautiful rendering that the designer made showing essentially exposed steel profiles.
The support columns are 3.5 x 3.5 x 1/4" and i am exploring fireproofing options.
Intumescent fireproofing looks the best but cost is very high.
cementitious fireproofing needs to be nearly 3" thick for this member size and thickness. then wrapped in something to make it look acceptable. gyp, or break metal. columns get to large and clunky.
We have seen some discussion of concrete filled tube steel columns but nothing that seems like it is tested and approved? anyone have any experience with this?
Straight gyp wrap looks like 5 layers of 5/8" gyp to achieve 3 hours on this post. to bulky again.
Anyone have any other suggestions how to minimize the size of the post once protected?
My recommendation of heavy timber falls on deaf ears.