wombat47
13th June 2005, 11:13 AM
We are in the process of replacing a timber framed window awning on our late Victorian brick "gem". The original had become somewhat unstable because of rotting joins, etc.
The young builder who made up the awning, using the original pieces as a pattern, intended to Dyna bolt the contraption to the wall. No! No! No!
These are old soft bricks with softer lime/sand mortar and one can imagine that a Dyna bolt expanding into the brickwork would crack the bricks. We thought that soft timber plugs into the brick would be the way to go.
The original awning supports were fitted with long bolts, flattened & pointed at the end, and the end 1/2" or so turned at a right angle. These were set in the mortar joint with the turned bit sitting against the back of a brick. Ingenious little things - but the only part showing, a square nut in a square hole in the timber, suggests that the awning support was fitted as the bricks were being laid.
Builder has now sort advice from elsewhere and has been advised to use Tiger Bolts. I've looked these up on the net and it seems they are used in the mining industry and seem to involve resin, applicators, etc. The original three supports (2xsides, 1xtop) were secured with 5 bolts.
The awning is 2660mm wide and will be "roofed" with Weathertex Shingles (a masonite type product which is somewhat heavy). The area is subject to high winds.
Has anyone any experience with Tiger Bolts? Any other recommendations?
The young builder who made up the awning, using the original pieces as a pattern, intended to Dyna bolt the contraption to the wall. No! No! No!
These are old soft bricks with softer lime/sand mortar and one can imagine that a Dyna bolt expanding into the brickwork would crack the bricks. We thought that soft timber plugs into the brick would be the way to go.
The original awning supports were fitted with long bolts, flattened & pointed at the end, and the end 1/2" or so turned at a right angle. These were set in the mortar joint with the turned bit sitting against the back of a brick. Ingenious little things - but the only part showing, a square nut in a square hole in the timber, suggests that the awning support was fitted as the bricks were being laid.
Builder has now sort advice from elsewhere and has been advised to use Tiger Bolts. I've looked these up on the net and it seems they are used in the mining industry and seem to involve resin, applicators, etc. The original three supports (2xsides, 1xtop) were secured with 5 bolts.
The awning is 2660mm wide and will be "roofed" with Weathertex Shingles (a masonite type product which is somewhat heavy). The area is subject to high winds.
Has anyone any experience with Tiger Bolts? Any other recommendations?