Browse Forums DIY, Home Maintenance & Repair Re: Correct deflection in floor - hybeam joists 2Aug 27, 2018 11:54 am Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Correct deflection in floor - hybeam joists 4Aug 27, 2018 2:55 pm Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Correct deflection in floor - hybeam joists 6Aug 28, 2018 7:38 am Notching at joist bearing will have no effect on deflection as the bending stresses are maximum at middle of the beam or at concentrated loads. As I pointed out before, you have presented half of the picture puzzle. No one in their right mind will give you useful advice based on that. Do yourself a service and engage a structural engineer to review the cause of the deflection and recommend a cure. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Correct deflection in floor - hybeam joists 7Aug 28, 2018 9:41 am I'm pretty sure I've provided all of the information you've asked for. The joist sizes, their spacings and spans, as well as the flooring material used above the joists. The correct beams and spacings were applied per the engineering designs and these were independently certified. Please let me know what other information you need. Thanks again. Re: Correct deflection in floor - hybeam joists 8Aug 29, 2018 7:44 am No there is insufficient information, what is needed is site inspection to verify the deflection, diagnose its cause (review documentation) and then recommend a remedy. Despite certification how do we know that the builder followed plans and detailing. How do we know that the owner has not altered something post construction? On this forum I provide guidance and general advice to assist owners in the right direction, I do not provide project specific free advice. That type of advice is fee for service and my question is why are you not asking your engineer? Remember this Free advice is worth money you pay for -nothing. The best advice is the advice you pay for because it should be the best option of the available alternatives and should save you more money (hopefully much more) than you pay for the advice and make your life easier. However you might get lucky, PM StructuralBIMGuy, he seems to offer structural free advice on this forum. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Correct deflection in floor - hybeam joists 9Aug 29, 2018 6:50 pm With all due respect, we're talking about a 10mm deflection over 3.6 metres that hasn't moved in almost 12 years. Most people wouldn't even worry about it. However being a perfectionist I want to correct it and enjoy walking across a truly level polished timber floor. There is a heap of information on Youtube regarding how to correct deflections such as this by using simple "sistering" techniques. Perhaps someone else on this forum who actually knows the correct way to "sister" Hybeams in these situations could provide some simple advice. The key thing I need to understand is where to nail/ screw correctly into the actual Hybeam. If this site is the wrong place to seek such advice, then just let me know and I'll be on my way. Thanks for all replies. I just noticed now the pictures I added to post right on top of page were wrong. I attached pictures showing "current" and my "suggested" floor… 9 11347 Houses have been framed on floor joists since settlement, chipboard flooring is only around for 50 years or so, so why would it not be satisfactory? However exercise skill… 3 9771 Hi All, about to commence a bathroom renovation and need some advice on subfloor works. Current subfloor is hardwood T&G floorboards on 90x45 joists, but intention is to… 0 4154 |