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Forums >> Revit Building >> Technical Support >> FLOOR / CEILING PROB WITH HOSTING LIGHT FITTINGS
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Joined: Mon, Aug 30, 2004
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Hi there,
Is there anybody who can beat “REVIT LOGIC”?
I have a 2 storey brick veneer residence.
I am using 400 deep “posistruts”: (manufactured floor trusses) as a floor structure
I designed a floor structure which has a “core” of 400mm
With 18 mm floor on top (substrate)
10mm plaster board to the underside (finish) perhaps we should call it substrata as well?
The floor edge extends to the outer face of the stud wall
It works fine and cuts through the stud wall
Surprise! The ceiling hosted light fittings will not stick to my ceiling
You guested it, REVIT LOGIC tells me my ceiling, is not a ceiling, it is a floor and refuses to host my light fittings
Any bright ideas there? Other than splitting my structure into a ceiling and floor
Or using floor hosted (floor below) light fittings with parametric height adjustment.
Would it be possible to convert ceiling hosted lighting families into floor hosted?
by just renaming the ceiling to a floor?
Thanks to all the fathfull who so generously share their knowledge (and time)
with total strangers.
Robert.
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Joined: Mon, Mar 14, 2005
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that's right it is not a ceiling, it's a floor.
in reality you will have ceiling batten fixed to the underside of the floor frame and the plaster board fixed to the battens (no?)
anyway, since you need to produce ceiling plans, I would just create a ceiling, make it what ever you want, 10mm of plaster if you fixing straight to the under side or compound ceiling with your battens...
will make your life easier... 
HTH
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Thanks eldados,
You confirmed my fears; it is just silly to have to double up.
Regarding battens, you are quite right 16 mm metal furring battens are best particularly
where beams and the like are embedded in the floor structure.
I just wanted to present it in a simple format. The joists are actually 412 deep.
If we keep the joists at 412 with 18 sheet flooring above this will cut nicely into the walls in section view
Using a ceiling of 16mm battens and 10mm plaster would be ok
But what about recessed down lights, if they are, say 100mm deep would they still cut into the floor directly above?
If they do not, one has to make sure the light source of the lamp is within the 16+10mm depth of the ceiling
Otherwise the light source would be buried in the floor
thanks for your speedy responce
have a happy chistmas
i trust you catch a few good waves while on the beach this chistmas holiday
make sure you have a few spare prawns to throw on the barbie in case i drop in.
bob.
melbourne
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Bob,
you have to remember that you model in Revit the way you build...
if you want to make things realistics without too much effort (well maybe the first time you do it )
why dont you use the Beam system under the structural tab? create your profile, easy enough, and create your beams and your 18mm floor on top and ceiling under. that way when you cut a section through you will have the proper elements in place, your lights will go in between the joists and everybody, including santa, will be happy!
have a good Xmas too mate, I'm going to have lot's of fun for sure!
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eldados,
thanks for that mate.
we do not always want to here the truth.
it is to late now for this project will just use 2d elec symbols.
next time i may do what you suggested or just have a floor of 18mm thick
and a ceiling of 26mm this way you do not have to worry about minor floor construction
details (as long as you know that it all works) and refer to engineers detaiis
the different truss manufacturers all have their own way of solving porblems
i residential work the levels are generally shown at the top and bot. of joists
how would you handle it in revit?
drop the level down to finished level and sit the ceiling on top?
or can we stick to the traditional way?
thanks again
robert
melbourne
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not sure i understand what your asking...
you need to decide what level will you refer to, ssl or ffl (for those of you reading at home FFL: finish floor level SSL: structural floor level) i normaly work to SSL.
the ceiling is just an offset from the floor.
am i on the right track here??
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i am ok now
i have been creating ceilings the wrong way
(zero offset from a ceiling level)
if i create the ceiling as an offset from the floor it
does not matter where the ceiling level is (structural or finished level)
Thanks and
cya
robert
melbourne
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