Loft hatch. I need to increase the size. its 16"wide&36long.Can i cut 1 rafter and put trimmers in to safely increase the width??has anyone any advice on this job? 
loft access /increase size
- Thread starter scrumpyjack
- Start date
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When you says rafter I think you mean ceiling joists, if so, then you can by putting double trimmer with joist hanger and best to double the ceiling joist on the side with screws or nuts/bolts/square plate washers on the whole length if you can.scrumpyjack said:
What is a trimmer?
Cheers.
Cheers.
If you cut out a section of ceiling joist or floor joist, you put in a trimmer which is the same size timber across the opening with joist hanger to support the the timber you've cut. Sometime we have to double the joist on the side for extra support.
See this and number 1 is a trimmer after the joist been cut out for a staircase
See this and number 1 is a trimmer after the joist been cut out for a staircase
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Cheers masona. So from a loft conversion point of view, those Trimmers looks quite tricky to fit!!!
(and a bit important)...
(and a bit important)...
Note that if you have trussed rafters cutting the joist part of the trussed rafter can cause problems as they are not designed to be cut at all.
From the Trussed Rafter Association .... "It cannot be overstressed that the strength and lightness of trussed rafters derives from the combination of members and joints brought together in a triangulated framework. Unless subject to special design arrangements with the trussed rafter designer, truss members must never be cut or trimmed." The TRA website can be found via Google.
From the Trussed Rafter Association .... "It cannot be overstressed that the strength and lightness of trussed rafters derives from the combination of members and joints brought together in a triangulated framework. Unless subject to special design arrangements with the trussed rafter designer, truss members must never be cut or trimmed." The TRA website can be found via Google.
I'm thinking about how to increase head room to a fixed ladder stair going up to a loft conversion (whose quality I'm trying to work out)... Had a look last night and it seems under the joists is a bit of wall above what used to be the cupboard door and is now the top of the door in front of the fixed ladder.
Thinks - there's not likely to be a lintel there as there's just 6 inches of wall above it before the joist, can't I just increase the height of the door to make better access to the loft? Would be a good excuse to fit a fire door that I'm sure would make a building inspector v happy.......
Cheers!
Thinks - there's not likely to be a lintel there as there's just 6 inches of wall above it before the joist, can't I just increase the height of the door to make better access to the loft? Would be a good excuse to fit a fire door that I'm sure would make a building inspector v happy.......
Cheers!
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