Browse Forums Owner Builder Forum 1 Apr 13, 2014 2:38 pm [code][/code]Hi all, Just wanted to find out, as our prefab frames are going up are the wall frames meant to fit exact on the slab's edge, as some sides they are protruding over the edge a bit, does that mean the carpenter hasn't lined them up, i.e. there shouldn't be any overhang? I will bring this up with the carpenter, but also wanted to know if it's normal practice. thanks Re: prefab wall frame installation questions 2Apr 13, 2014 3:54 pm The problem may well be the slab is slightly too small and the prefab frames won't fit properly on it. The allowable overhang, according to the code, is 10mm. The next issue could well be overhanging bricks (see: http://www.anewhouse.com.au/2014/02/ove ... brickwork/) The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: prefab wall frame installation questions 3Apr 13, 2014 4:08 pm bashworth The problem may well be the slab is slightly too small and the prefab frames won't fit properly on it. The allowable overhang, according to the code, is 10mm. The next issue could well be overhanging bricks (see: http://www.anewhouse.com.au/2014/02/ove ... brickwork/) Thanks for the info bashworth.... I am a bit concerned is there a substitute fix for the frames that I could push for with the carpenter? Re: prefab wall frame installation questions 4Apr 13, 2014 4:18 pm Probably the best solution is to shorten the frames to suit the slab dimensions, but you are going to be charged extra. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: prefab wall frame installation questions 5Apr 13, 2014 4:25 pm bashworth Probably the best solution is to shorten the frames to suit the slab dimensions, but you are going to be charged extra. As in, chisel the overhang part off? will that have any structural implications by cutting off the edges etc, reducing radiata pine thickness? Also to note, the chippie hasn't raised this with me, i've only noticed it.. I would assume them to pick upon this and bring it to the attention of the owner? Regards Re: prefab wall frame installation questions 6Apr 13, 2014 5:15 pm gav89z bashworth As in, chisel the overhang part off? will that have any structural implications by cutting off the edges etc, reducing radiata pine thickness? Regards No adjust the internal frames to make the wall frames fir exactly on the edge. It will be a complicated job as it will involve rebuilding the ends of the frames. If the frames only overhangs the 10mm the tradie would probably just get on with it. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: prefab wall frame installation questions 8Apr 13, 2014 6:10 pm Dont go cutting any walls back, this will affect the truss overhang. This a pretty common issue with pre-nail frames and is not one to get too excited about even if the frame is overhanging the slab 50mm. There is a solution, the solution will be determined by the engineer. Re: prefab wall frame installation questions 9Apr 14, 2014 10:30 am You will probably find that the chippy has squared the rooms up and that the concrete is either not square or to the exact measurement. Also pre-made frames tend to creep a bit in size even when made to the exact mm. Across a house where four or five butt up against each other it is not unusual for the total measurement to creep 5 - 10mm. Stewie Re: prefab wall frame installation questions 10Apr 14, 2014 1:09 pm ...it also looks far better than having the slab sticking out past the frame. Ours is almost 10mm over at one section, looking at others in out street it's a fairly common occurence. Re: prefab wall frame installation questions 11Apr 14, 2014 2:02 pm thanks all for the input. I've just returned from the site and did some measurements along the edgebeams, most parts the frame is sticking out 5mm the most <10mm, which is good. Except for the the part in the garage slab area, our garage is a step down from the main floor inside the home, and the garage wall the frame is sticking out around 15mm there, except I believe there shouldn't be any issue of brick overhang as the garage has plenty of room to support the bricks, unlike the brick edge beams. Cheers!. Re: prefab wall frame installation questions 12Apr 14, 2014 2:40 pm Stewie D You will probably find that the chippy has squared the rooms up and that the concrete is either not square or to the exact measurement yes and isnt this just a rehash of the continual problem being reported in these forums, ie concretors who just cant box up a slab to measurement. Pathetic. Stewie D . Also pre-made frames tend to creep a bit in size even when made to the exact mm. Across a house where four or five butt up against each other it is not unusual for the total measurement to creep 5 - 10mm. Stewie But surely when the frames are made up, creep should be taken into account by making each frame section a few mm undersixe in width to counteract? 5 ml overhang ok, 10mm not ok.( thats just me). Re: prefab wall frame installation questions 13Apr 14, 2014 4:38 pm I agree qebtel, the frame manufacturers should but in my experience they rarely do. One reason why we used to frame most jobs ourselves on site. I also think on the OP's job the carpenter should have cut the top and bottom plate 5,10mm whatever and then tapped the last stud in the same amount. He would have got the frames to match the slab ( I'm unsure if the overhang is for the slab out of square or frame creep as I mentioned ). It wouldn't take long to rectify at the time, harder now. Stewie Re: prefab wall frame installation questions 14Apr 14, 2014 6:04 pm qebtel yes and isnt this just a rehash of the continual problem being reported in these forums, ie concretors who just cant box up a slab to measurement. Pathetic. Mate thats where the human factor comes into building a house, this may seem like a personal attack because it is. I wish the building industry was just like your perfect world where there are no mistakes. I've been in the building industry for 35 years and have no idea how many houses i've built. One thing i can guarentee is not one of them was perfect. Its inflametry comments like yours above that give new home builders the idea it will be all perfect and when its not they have all sorts of stresses. Rant over For the OP, a maximum of 10mm overhang is allowed as long as tie down of no closer than 50mm from the edge of the slab can be achieved. So if its a 90mm frame thers no problem, a 70mm frame may need a little closer attention. Re: prefab wall frame installation questions 15Apr 15, 2014 9:15 am Depending on how big a cavity you have allowed for in the brick veneer you could make up small discrepancies in the timber frame within the cavity itself as long as the minimum is maintained. In concretors defence most slabs I've seen are pretty good for level, overall measurement and being square - even ours were never perfect. I used to be concerned that we had all the pipe penetrations for bathrooms, kitchens etc in the right place, set-downs for wet areas or reo starter bars set out right for besser block walls. Get that wrong and you have all sorts of problems. Stewie Re: prefab wall frame installation questions 16Jun 07, 2014 10:40 pm I had my frame stage completed and was inspected by my building inspector. He found out that the slab was under poured by 20mm and all the rooms on that side are 20mm under. He mentioned that on his report which I forwarded to my site supervisor and asked him to advise me on how they are going to fix it. I didn't want them to overhang the bottom by 20mm to achieve the correct dimensions as per plan. Since I didn't hear anything back from him, I visited the site and noticed that they have moved the frame and to avoid the overhang, they have put a timber block underneath bolted to the slab. It's not all the way though. Very strange fix to me. On top of that, bcoz they had to move the frame, I can see the damage to the bottom plates. Probably caused when they removed the nails or bolts to move. Now I see some bottom plates are split. It really worries me. If I knew that, I wouldn't have asked them to fix it and keep it as it is. Have a look at these picture and tell me whether it's ok or not. Thanks Re: prefab wall frame installation questions 18Jun 08, 2014 8:59 pm I just came across an inspection report outlining exactly the same issue. Yes it's not acceptable. I'll be contacting my site supervisor to make sure he stops there. That's just a cheap remedy. Still I dunno abt the bottom plates but I will be pushing them to change it. Re: prefab wall frame installation questions 20Jul 07, 2014 9:53 am Hi Subzero_Aus, I just came to this thread from a link on another thread. Looking at the photos that you have posted, I think that you should also be concerned by the water pooling next to the slab. That is just not on. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. This is 100% true. You can not hang anything on steel frames. very frustrating 8 5322 Not sure what council area you are in. Some LGA's allow zero lot retaining walls. This usually occurs in greenfield developments but not often in established areas. You… 1 8212 4 11183 |