rafter split
- Thread starter Newby2
- Start date
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Newby2, hi.
The photo provided shows a very, very, very common defect in timber, that defect is called a "Wainey or Wany edge" [I cannot recall the correct spelling?] this condition is simply an inclusion of the bark of the tree subsumed and seen in the timber. The reason for the inclusion of bark, is simply that when sawing that particular bit of timber, the saw was set too close to the bark.
Such a defect as you have an image of will not occur on or in a roof truss, the material the trusses are made from are all "stress graded" and as such they are stamped with an indelible makers mark and the particular grade to which that bit of timber in all the trusses is graded to, further somewhere on one or more of the trusses is a bit of plastic that has the makers name, the grade of timber used and to what BS. Specification the truss is graded and designed to perform to
As an aside the bit of timber you have taken an image of may well not be a rafter, it appears to be a brace, a piece of timber specifically designed and engineered to prevent the rafters, or probably better described as trusses machine made and jointed highly engineered from twisting and buckling, these braces are an integral part of the overall design of the trussed roof, and will hold the individual trusses in place prior to the sarking [I see you are a Scot] being fitted, the sarking can be either 9mm. ply or old school timber boards.
A very small defect in a brace is of no concern at all.
Hope this assists?
Ken.
The photo provided shows a very, very, very common defect in timber, that defect is called a "Wainey or Wany edge" [I cannot recall the correct spelling?] this condition is simply an inclusion of the bark of the tree subsumed and seen in the timber. The reason for the inclusion of bark, is simply that when sawing that particular bit of timber, the saw was set too close to the bark.
Such a defect as you have an image of will not occur on or in a roof truss, the material the trusses are made from are all "stress graded" and as such they are stamped with an indelible makers mark and the particular grade to which that bit of timber in all the trusses is graded to, further somewhere on one or more of the trusses is a bit of plastic that has the makers name, the grade of timber used and to what BS. Specification the truss is graded and designed to perform to
As an aside the bit of timber you have taken an image of may well not be a rafter, it appears to be a brace, a piece of timber specifically designed and engineered to prevent the rafters, or probably better described as trusses machine made and jointed highly engineered from twisting and buckling, these braces are an integral part of the overall design of the trussed roof, and will hold the individual trusses in place prior to the sarking [I see you are a Scot] being fitted, the sarking can be either 9mm. ply or old school timber boards.
A very small defect in a brace is of no concern at all.
Hope this assists?
Ken.
Agree looks like bracing, not a problem.
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