Browse Forums General Discussion Re: Please explain - engineers? 2Oct 24, 2023 2:29 pm Architectural Homes & Duplexes - specialising in custom designing homes to your budget Get a Free Onsite Consultation Today or send a PM for information, questions or advice. Re: Please explain - engineers? 4Oct 24, 2023 4:37 pm Architectural Homes & Duplexes - specialising in custom designing homes to your budget Get a Free Onsite Consultation Today or send a PM for information, questions or advice. Re: Please explain - engineers? 7Oct 25, 2023 12:20 am Ardo To me those holes are not round. You need to consider them to be a larger hole then cut. So the distance between the two sides is the actual hole size. By my reckoning not in spec. Oval holes are permissable. Those holes have been cut in the factory so will definitely be engineered from the factory and not just cut randomly on site. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Please explain - engineers? 8Oct 25, 2023 8:48 am supersleuth Hi. The floor joists were cut out to allow ducting through as per photo below. But I dont understand how this cut-out does not completely destroy the load bearing capacity of the joists. It was approved by engineering but I'm just too dumb to understand why the floor doesn't collapse? https://imgur.com/a/QBXjFtQ I cannot give engineering opinion but I completed structural enginnering subjects In the School of Engineering as part of my building degree. The holes in your joists are at mid span where there are maximum bending stresses in top and bottom chord, but shear stresses are zero, that is why it will work. 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: Please explain - engineers? 9Oct 25, 2023 10:23 am Pulse I- joists strength is in the top and bottom chords, the OSB web just keeps them apart. If you are worried add an extra ply face fixed to the side of the joist. Thanks that kinda makes sense. Im not worried about it, just always wondered how it works and forgot to investigate further during build. The home is 3.5 years old and very happy with the overall quality of the build. Re: Please explain - engineers? 10Oct 25, 2023 10:24 am chippy Ardo To me those holes are not round. You need to consider them to be a larger hole then cut. So the distance between the two sides is the actual hole size. By my reckoning not in spec. Oval holes are permissable. Those holes have been cut in the factory so will definitely be engineered from the factory and not just cut randomly on site. Yep well spotted - they were definitely cut in factory and delivered that way. Re: Please explain - engineers? 11Oct 25, 2023 10:27 am building-expert supersleuth Hi. The floor joists were cut out to allow ducting through as per photo below. I cannot give engineering opinion but I completed structural enginnering subjects In the School of Engineering as part og my building degree. The holes in your joists are at mid span where there are maximum bending stresses in top and bottom chord, but shear stresses are zero, that is why it will work. Thanks. I wish there was a youtube video explaining this concept. I’m not a structural engineer but I’m free. you still need an engineer for the plans. I only have part of your plans, but you seem to have a 850mm drop from the side… 3 10369 i had the my concreters concrete right up to the fence. I have pits all along my path, so the water tends to drain away from the house and into the pits. There's only one… 7 13528 |