Plaster boarding a RSJ & Catnic lintels.

[andynumpty]

Hi, what is the best way to enclose a RSJ & underneath a metal lintel?

Thanks.

 

[PrenticeBoyofDerry]

can you box it out with timber?

 

[karlosmaximos]

When you say metal lintel i presume you mean over a window opening?
Dot and dab works fine.
As for the rsj,it needs nogging out and then covering with either 2x9mm/12.5mm plasterboard or 1xfireline board to give it the fire protection,i find deifferent methods work bettter for different applications
e.g if the beam is going to be seen then its fine with 1x fireline,but if youre trying to blend it in with a wall uve taken out(say between 2 rooms) then building out with more sheets of board might be the better option.
Hope this makes sence

 

[andynumpty]

Hi, thanks for your replys.

How would you actually plaster board the underneath of the RSJ ie how to get the board to fix to.

 

[karlosmaximos]

There are different ways of doing it depending(in my opinion) the overall thickness of the beams appearance i.e if its to finish flush with an existing wall as mentioned earlier.
Once the rsj is nogged out then you can fix plasterboard to it and let it hang past the rsj so you could fix say a tile lath to it and then board the underneath.
Or after nogging,fix laths to the noggs and build it all the way round(-you would have small bits running down from noggs just past bottom of beam,then a long continuous piece running length of beam) and then fix plasterboard to this.
Its alot easier than i probably make it sound

 

[Micilin]

Noggings in each side of rsj. Cut a piece of board to length, but the width is enough to wrap around the rsj. score (NOT CUT) the board so that it will bend around the rsj.

IF you want , a bit of grip fill on underside of the rsj.

Fix first side of board into noggins with screws, wrap board around using scores to fold it, screw in other side, Fix beads and skim!