What are the typical spacings of the coach bolts used for flitch beams? The timber is 75x145 with steel measuring 10x140
I was looking at a friend's report which says to use M12 bolts staggered 36mm off center line but further down the report it says must be 48mm from ends and edges of the timber. 4x coach bolt size
If bolts are staggered 48mm from edges then it certainly won't be 36mm from center of the beam.
It also says 2 bolts at each end 50mm from inner edge of support. Each bearing is 100mm but obviously M12 bolts will leave 38mm to edge of timber less than 48mm specified.
The beam spans 3m which breaks up a 6m span for domestic floor.
Which are the most important measurements when it comes to fixing the the bolts because it seems impossible to please every dimension
I was looking at a friend's report which says to use M12 bolts staggered 36mm off center line but further down the report it says must be 48mm from ends and edges of the timber. 4x coach bolt size
If bolts are staggered 48mm from edges then it certainly won't be 36mm from center of the beam.
It also says 2 bolts at each end 50mm from inner edge of support. Each bearing is 100mm but obviously M12 bolts will leave 38mm to edge of timber less than 48mm specified.
The beam spans 3m which breaks up a 6m span for domestic floor.
Which are the most important measurements when it comes to fixing the the bolts because it seems impossible to please every dimension
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