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Forums >> Revit Building >> Technical Support >> Fire Rated Walls Plan
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Joined: Thu, Sep 13, 2007
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Typically in our projects we show a plan that shows all the fire rated walls. In CAD we would draw the walls with a thick dashed linetype that varies depending on the fire rating and have the floor plan greyed out. Is there a way to create a view in Revit that would do this kind of notation automatically? Thanks
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No.. some companies are using custom line based details parts.
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Here is our approach in case it helps you: Our fire-rated walls are a separate wall type from non-rated walls. For instance, a 6" metal stud w/ gyp ea. side wall and a two-hour rated 6" metal stud w/ gyp ea. side wall are two different wall types. In the rated vesion if you edit the structure you would see that we change the material of the core to a custom cut pattern. For instance, we have "Masonry - Concrete Masonry Units" and "Masonry - Concrete Masonry Units 1 hr" where the rated version of the material has a thick dashed black line over thin CMU crosshatching. This works well for us because it shows the fire-rating in every plan that is made which is our office standard, but won't work so well if you only want it in one sheet like the Life Safety Plan instead of every floor plan, enlarged plan, etc. You can make wall cut patterns invisible in Visibility Graphics, but then you lose all cut patterns like brick veneers...so that, again, will depend on your office standard. Also, it shows up in section, which can be handy for quick reference shots, but we put a masking region over the structural core for detailed wall sections to hide the rating pattern. That's only an issue in the stud walls because the masking region wouldn't otherwise be needed whereas CMU would get masked and detailed with block coursing anyway. It can get intersting if you have a many-layered core. Sound/fire walls that have an air space between two layers of metal studs get a layer of "fire-rated air" between them. Hope this helps.
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We simple do a floor plan where the walls are over-ridden to a screen and we add various thick linework liks we did in CAD. Not automatic but no worse than before.
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I wish that we could do that. Seems MUCH less complicated. Unfortunately, we've had construction issues like the plumbing sub not realizing that he was penetrating a fire-rated assembly because the only arch sheet he had was the enlarged toilet plan. Now our standard is to show it on every sheet to avoid those kinds of oversights. On the bright side, our approach is only complicated in the set-up...not too difficult to actually use. Happy Fire-rating!
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Similar to Bauhaus's solution, you could apply that custom pattern as a "Coarse Scale Fill Pattern". Then it will only show up when the view is set to a coarse resolution. Unfortunately, these two solutions will leave the pattern line's width dependant on the width of the partition (or it's core material) and will leave you with a variable width line accross different partition types. Does not look clean in situations where there are several different rated partition widths.
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I guess our dashes are long enough and our scale small enough that wall width doesn't make a significant graphical difference. If someone actually uses width in their denotation then my idea is absolutely the wrong way to do it. Our pattern is length based. Dashes for 1 hour, dash dot dot for 2 hour, dash dot dot dot dot for 4 hour, etc where by "dot" I actually mean short-little dash. Anyway, like most things in Revit, there are definite pros and cons when it comes to workarounds.
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How do you get the dashed line work over the hatch pattern? Are there any "standards" for fire wall designations?
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I like bauhaus1919's solution. Your fire material has for a cmu wall a double cross hatch with a fire line on top of the cross hatch (correct) How did you create this material. I would think you created a hatch that combines these two elements. I tried using a hatch creation program and got close but the fire line was not always visible in the wall. It's oriigin was not correct. I started in autocad with a cross hatch and then put a line with 1HR over it. Then used the hatch program to create a hatch, imported into REVIT, created material using the newly created hatch and as I say the 1 hr line does not always show up in wall core. Any tips on how you did this
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Bauhaus1919 will surely correct me if I'm wrong. As I understand it, they have the fire tape, or the material hatch, but you can't have both at the same time. In my experience, when using the material to host the fire tape, one sees only the fire tape as material pattern for the core material, be it studs or CMU. The fire tape hatch is covered in details by inserting (opaque) detail components like repeating families of CMU blocks over-top of it, or inserting a -Gasp- filled region, to cover it in the case of studs.
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Why not use the parameter for the wall rating? Then apply a view filter to the walls cut line pattern that is really thick so that appears to be one line. Then the different ratings can be filtered to the different line types based on rating 0, 30 for smoke, 60 1-hr, etc.
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