V8landy Posted March 9, 2011 Report Share Posted March 9, 2011 (edited) Hi I am coverting a flat roof to a pitched, finaly after 2 years of delays, starting it next month. Am using pre made roof trusses. Removing the full flat roof, roof beams as well. will be fixing a 4 x2 wall plate to fix roof trusses to, but not clear on what (if any) hold down straps will need? Assume I will fix to trusses and then come through plaster celing and chase out wall plaster and fix into brickwork in room below? I will also check with roof truss compnay, but I have allready asked them a million questions! I guess it is like the picture below I need>? Edited March 9, 2011 by V8landy Quote Link to comment Share on other sites More sharing options...
V8landy Posted March 9, 2011 Author Report Share Posted March 9, 2011 (edited) Found them now! But which lenght? Will Building officer tell me? http://catalogue.chilterntimber.co.uk/product2900625catno790625.html Edited March 9, 2011 by V8landy Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted March 9, 2011 Report Share Posted March 9, 2011 Found them now! But which lenght? Will Building officer tell me? http://catalogue.chilterntimber.co.uk/product2900625catno790625.html 1200mm long with 4 screws fixing them to the wall, one in each block that they span Quote Link to comment Share on other sites More sharing options...
mowdy Posted March 9, 2011 Report Share Posted March 9, 2011 V8 Landy Yes you do fix the wall plates down with those vertical straps often going under the name of "Bat-straps" if you orderd the metal work with your trusses they should come with the kit just place them as per the truss fixing instruction (plan)1.5 mt apart if i remember rightly. Bob Quote Link to comment Share on other sites More sharing options...
mikee Posted March 9, 2011 Report Share Posted March 9, 2011 somewhere between 1200 and 1500mm apart mikee Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted March 9, 2011 Report Share Posted March 9, 2011 V8 Landy Yes you do fix the wall plates down with those vertical straps often going under the name of "Bat-straps" if you orderd the metal work with your trusses they should come with the kit just place them as per the truss fixing instruction (plan)1.5 mt apart if i remember rightly. Bob The last time I fixed some they were to be spaced at 2 metres apart which is stupid because the trusses are at 600mm centres so the two measurements don't work with each other. A lot of the time windows, garage doors and such like mean you are restricted how many you can fix in a given space anywway. Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted March 9, 2011 Report Share Posted March 9, 2011 somewhere between 1200 and 1500mm apart mikee They aren't that close, look at the example picture. Quote Link to comment Share on other sites More sharing options...
figgy Posted March 9, 2011 Report Share Posted March 9, 2011 (edited) Also get some truss clips makes a better job of fixing the trusses to the wall plate with little square twist nails on the trusses side just watch your fingers These are used instead of spiking nails on angle into both. Edited March 9, 2011 by figgy Quote Link to comment Share on other sites More sharing options...
Paddy Galore! Posted March 9, 2011 Report Share Posted March 9, 2011 They aren't that close, look at the example picture. building specs should state 1200-1500 spacings, doesn't always happen but they're the specs. Quote Link to comment Share on other sites More sharing options...
linny Posted March 9, 2011 Report Share Posted March 9, 2011 pan straps 1200 centers or just ask building control to be on the safe side you have to dance to there tune where in east yorks are you Quote Link to comment Share on other sites More sharing options...
linny Posted March 9, 2011 Report Share Posted March 9, 2011 Also get some truss clips makes a better job of fixing the trusses to the wall plate with little square twist nails on the trusses side just watch your fingers These are used instead of spiking nails on angle into both. sheradised nails Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted March 9, 2011 Report Share Posted March 9, 2011 pan straps 1200 centers or just ask building control to be on the safe side you have to dance to there tune where in east yorks are you Manufacturer states 2metre centres which ties in with what I've always used unless the regs have changed very recently. http://www.strongtie.co.uk/pdf/hes.pdf Quote Link to comment Share on other sites More sharing options...
Scully Posted March 9, 2011 Report Share Posted March 9, 2011 We often use 'Cullen' straps and 'shoes'.If you get the twist straps you can come straight off your trusses and onto the wall.1200 centres should do it,but take the advice of whoever is actually doing the job. Quote Link to comment Share on other sites More sharing options...
Acid House Posted March 9, 2011 Report Share Posted March 9, 2011 If required in roof design (ask roof designer) Minimum 2m centres. 4mm x 75mm hardened nails or no.12 x 50mm wood screws into plugs. Number of fixings is either as design or NHBC Standards are 4 fixings per strap. Quote Link to comment Share on other sites More sharing options...
linny Posted March 9, 2011 Report Share Posted March 9, 2011 If required in roof design (ask roof designer) Minimum 2m centres. 4mm x 75mm hardened nails or no.12 x 50mm wood screws into plugs. Number of fixings is either as design or NHBC Standards are 4 fixings per strap. Minimum 2m centres Quote Link to comment Share on other sites More sharing options...
pegleg31 Posted March 9, 2011 Report Share Posted March 9, 2011 You really want a 3"x2" tanalised wall plate Depends on planning in your area, recently i put a large roof onto a 5 bedroom house with no wall plate straps needed.Personally i always put them about .8m/1m and 2 screws into every block they span If you buy a trussed roof it should come with all the truss clips and a plan to tell you what bracing it needs, personally i'd go traditional Quote Link to comment Share on other sites More sharing options...
pegleg31 Posted March 9, 2011 Report Share Posted March 9, 2011 If required in roof design (ask roof designer) Minimum 2m centres. 4mm x 75mm hardened nails or no.12 x 50mm wood screws into plugs. Number of fixings is either as design or NHBC Standards are 4 fixings per strap. biggest load of **** in the building industry since the CSCS card Quote Link to comment Share on other sites More sharing options...
vampire Posted March 9, 2011 Report Share Posted March 9, 2011 1200mm long with 4 screws fixing them to the wall, one in each block that they span Manufacturer states 2metre centres which ties in with what I've always used unless the regs have changed very recently. http://www.strongtie.co.uk/pdf/hes.pdf Quick off the mark (12 minutes),and accurate with advice Quote Link to comment Share on other sites More sharing options...
V8landy Posted March 9, 2011 Author Report Share Posted March 9, 2011 You really want a 3"x2" tanalised wall plate Depends on planning in your area, recently i put a large roof onto a 5 bedroom house with no wall plate straps needed.Personally i always put them about .8m/1m and 2 screws into every block they span If you buy a trussed roof it should come with all the truss clips and a plan to tell you what bracing it needs, personally i'd go traditional THnaks Guys Truss company said 4 x 2 for wall plate, and I have got it tanalised. BCO said will be checking hold down straps etc. Roof is approx 4m wide by 6m long, just get 35 deg pitch, as forced in by how it joins in with main house roof. It will be a hip at one end and running into main roof with valley. Just checked my quote for roof trusses and it says "metalwork - including clips, shoes Nails £20.58" So will clarify with them what that includes. Also includes Stability bracing and infils. £400 inc vat inc delivery and desing calculations which BCO has said will need. £400 is not worth messing about to be doing a cut roof, when we have enough on doing the job as it stands . BCO said will vist once trusses are all fixed in place pre covering. Laso stated needs to be breather memberane and sutiable ventilation (we are doing over facia vents), bird gauds, felt trays etc. And then BCO will come out when finsished to check insualation and then fingers crossed sign it off. Quote Link to comment Share on other sites More sharing options...
Acid House Posted March 9, 2011 Report Share Posted March 9, 2011 Minimum 2m centres Yes......... minimum required As apposed to maximum possible................ touching Quote Link to comment Share on other sites More sharing options...
Acid House Posted March 9, 2011 Report Share Posted March 9, 2011 biggest load of **** in the building industry since the CSCS card Cant agree more but with my lot using them for insurance and H&S monitoring one gets used to them. In my oppinion they are getting way too powerfull for the industries good. This years NHBC Standards edition is quite good though. I have it under the short leg of my dining table. Quote Link to comment Share on other sites More sharing options...
V8landy Posted March 9, 2011 Author Report Share Posted March 9, 2011 Building regs Part A, details it on page 28 http://www.planningportal.gov.uk/uploads/br/BR_PDF_AD_A_2004.pdf But mentions only for gable end walls, Just check my walls and the straps will just fit well between the 2 windows on one wall, the other has no windows in. Quote Link to comment Share on other sites More sharing options...
whiskymac Posted March 9, 2011 Report Share Posted March 9, 2011 I usually do straps at 1200mm, barring obstacles and screwed to blocks with 4 or 5 screws. Biggest obstacle is getting trusses in level as the brickie has set the wall plate at times and not a joiner. Seen some horrendous attempts at joining wall plates. Quote Link to comment Share on other sites More sharing options...
pegleg31 Posted March 9, 2011 Report Share Posted March 9, 2011 (edited) sorry V8lndy i've been drinking, i meant 4"x3" tanalised timber i'm a joiner first and a builder second, one thing i know is roofs edited to say if your not too far away i don't mind giving you a hand :o to much wine, now hitting whisky damn i was drunk last night , still the offers there for the price of the diesel Edited March 10, 2011 by pegleg31 Quote Link to comment Share on other sites More sharing options...
V8landy Posted March 9, 2011 Author Report Share Posted March 9, 2011 I usually do straps at 1200mm, barring obstacles and screwed to blocks with 4 or 5 screws. Biggest obstacle is getting trusses in level as the brickie has set the wall plate at times and not a joiner. Seen some horrendous attempts at joining wall plates. Yes, need to get wall plate level espicaly as was (is) flat roof which has a fall. The inner wall is brick, so Assume as long as I get into brick OK? Will need to break through plasterboard celing and then chase out plaster to embed straps. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.