Purlins not supported at party wall
- Thread starter Bl55YJS
- Start date
I think mine sits on a short piece of timber nailed into the wall.
It would be easy to do, but use a resin fixing instead of nails.
Or use a heavy duty bracket or length of angle iron.
Half days work for a competent builder.
It would be easy to do, but use a resin fixing instead of nails.
Or use a heavy duty bracket or length of angle iron.
Half days work for a competent builder.
all depends on size of purlin, it may have been designed to as a cantilever support for that section of roof. Is it just that one strut centrally placed and it has stood the test of time
2x4 I believe the purlins are. I believe that there are 2 struts on each purlin, staggered. So the 2nd strut on the right hand side purlin in the image is behind the camera and you can just see the second strut on the left hand side purlin in the bottom left of the image.
2 x 4 seem a bit flimsy for cantilevered supports, although it may be cantilevered design at the 2 different ends of the purlins, may be something to do with the position of the supporting walls beneath the struts but impossible to give a balanced view without the full picture of layout/sizes etc, back to the test of time logic!!
Sorry if it’s difficult to explain, can you help me understand what the cantilever design would be in this case/how it would work to hold the roof up securely? No knowledge of this stuff and no idea how it would work!
It means the purlin is supported on props, albeit those props are not at the ends of the purlin, rather they are somewhat set in from the ends - hence cantilever.
A roof (ceiling, or floor) structure can gain some adventitious strength/rigidity, simply from having the purlin there, tying all the rafters together.
Easy fix: Something as simple as elongating the purlin with some pre-drilled steel channel or angle and let that into the wall. Or as others have said, pick up the end of the purlin using a steel angle plate bolted to the wall.
I'd do it when the sun has calmed down a bit.
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It is strange how a surveyor would say that they are not adequetly supported, the rooof has been designed this way and has shown it to be adequetly supported for the past 100 years. I am uncertain that anything needs doing at all to support them as attaching them now to the structure may introduce a problem of cracking the gable end brickwork should any movement in the perlin occur.
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