Browse Forums Owner Builder Forum Re: who does the design for posi sturt floor joits ? 4Jul 15, 2009 9:43 pm Depends what you mean on design???? The actual manufacture of the posis are by a pre fab company. If you mean who designs the lengths / loads etc and where to use and how, the structural engineer who does the computations for the house will do the posi struts, as they will have the loads they can cary / spans etc according to the BCA. Truss manufacturers are looking after the roofing not the floor loading. There is no difference between using solid hardwood for joists of posis they still have limits and capabilities and that is what the engineer designs. Cheers Re: who does the design for posi sturt floor joits ? 5Jul 16, 2009 8:49 am hunts01 Depends what you mean on design???? The actual manufacture of the posis are by a pre fab company. If you mean who designs the lengths / loads etc and where to use and how, the structural engineer who does the computations for the house will do the posi struts, as they will have the loads they can cary / spans etc according to the BCA. Truss manufacturers are looking after the roofing not the floor loading. There is no difference between using solid hardwood for joists of posis they still have limits and capabilities and that is what the engineer designs. Cheers You couldn't be further from the truth, the truss manufacturer designs and manufacturers the Posi struts using there design software. Do you think that only engineers can read the AS/BCA? As for solid timber joists, these are designed in conjunction with span tables, something that anyone in the know can read and design. I dont know why people post things they have no idea about, spreading misinformation but it seems to happen a lot on here. Re: who does the design for posi sturt floor joits ? 6Jul 16, 2009 6:38 pm Well nomad our engineer who did the structural side of the house, nominated posi struts and their size and lengths, as well as all the steel, roof layout, sub floor layout etc. I then sent the plans which showed the posi strut layout , spans etc to the pre fab companies to quote on. How can you call that misinformation, just because it is different to what you say doesn't mean it is incorrect, it is a different way of achieving the same result, and if you have to use an engineer for other parts of the house what does it matter. I didn't say that an engineer is the only one who can read loading limits and spans, I was only highlighting that different options all have limits and different capabilites. And if the person is asking a question, wouldn't you assume they don't know the answer? I may be wrong but generally if I ask a question , I don't know the answer or want an opinion, if elchagie was competent in that area (like yourself) i am sure they would know what to do. It is good to know that we have the oracle of all things building wise at our disposal, don't know why its an open forum it should just be a question and answer with you, oh mighty wise one. Re: who does the design for posi sturt floor joits ? 7Jul 16, 2009 7:49 pm Then why wouldn't you say that as an alternative an engineer may do the Posi design which is still partially incorrect. "If you mean who designs the lengths / loads etc and where to use and how, the structural engineer who does the computations for the house will do the posi struts, as they will have the loads they can cary / spans etc according to the BCA. Truss manufacturers are looking after the roofing not the floor loading" That really looks to me like your saying the engineer does the design, but basically as you mentioned an engineer did the design for your Posi's but so did the truss manufacturer, what you have done is paid for the same job to be done twice. Even if an engineer does do the design the truss manufacturer still needs to design the Posi Struts using there software, they probably didn't take much notice of the layout the engineer provided. So to sum up there is no need to pay for an engineer to do the design when the truss manufacturer MUST do the design and certification anyway. So should I just let you with your whole what one house? building experience preach your thoughts on how the building industry works? I dont answer questions that I'm not sure on, you wont see me in the interior design arguing colors or if timber windows are better than aluminum. If everyone stuck to answering what they know and not guessing then this forum would give a lot more accurate information. Re: who does the design for posi sturt floor joits ? 8Jul 16, 2009 8:08 pm No worries oracle. I would be suprised if elchagie was not refering to the actual spans and uses of the posi struts, compared to the mechanics and intricate design on how they are made. And no I didn't pay twice, the engineer can access posi information just as they can solid floor joists / I beams / Hy joists etc, if you were not aware these companies make the information availible so that they can be utilised by architects and engineers. Once they nominated what to use i just rang up the pre fab companies and quoted the lengths and amount i required and they gave me the prices. If future nomad if we we could send through our replies directly to you before we post our ideas and experiences, you can filter out what is relevant and with your wisdom and knowledge you can put them onto the website if you deem fit. Good luck elchagie. Re: who does the design for posi sturt floor joits ? 9Jul 16, 2009 8:31 pm Looks to me like someone is trying to back paddle there way out using some dry humor. Engineers don't do that for free are you that naive or just trying to mislead the forum. You see that information is made available for a preliminary design, so that architects etc can workout the size of the floor cavity needed. But if I were to be the filter I'm afraid you wouldn't be posting to much hunts, maybe you would be more suited to the kitchen corner thread. Re: who does the design for posi sturt floor joits ? 10Jul 16, 2009 8:39 pm Sounds good I will post something in the kitchen corner, however you haven't answered the question are we all able to post our replies straight to you for screening?? And before I post in the kitchen corner section, would you be able to start a thread that outlines anything that you are not an expert on, so we know what we can feel free to speak about, I am sure it would be a fairly short thread. Re: who does the design for posi sturt floor joits ? 11Jul 16, 2009 8:54 pm I'm sorry to have upset you hunts I was merely correcting your misleading post.To get back on topic a truss manufacturer does the design and certification for Posi Struts, an engineer/architect etc may do a preliminary design if requested. Re: who does the design for posi sturt floor joits ? 13Dec 06, 2010 11:28 pm I think you guys have mis-led eachother. My only advice is, before you read a table, know what you are reading. Most manufacturers are not structural engineers and rely on a table or a program to output a member size, not knowing how the posi-strut system actually works. I've seen a few bouncy floors in my time and a manufacturer wouldn't know why. If it was my house I would definitely be seeking advise from a certified structural engineer for a correct solution. Re: who does the design for posi sturt floor joits ? 14Dec 07, 2010 9:52 am StructEngineer I think you guys have mis-led eachother. My only advice is, before you read a table, know what you are reading. Most manufacturers are not structural engineers and rely on a table or a program to output a member size, not knowing how the posi-strut system actually works. I've seen a few bouncy floors in my time and a manufacturer wouldn't know why. If it was my house I would definitely be seeking advise from a certified structural engineer for a correct solution. This thread is a year old.... Custom European Cabinets - Melbourne Kitchen Specialist PM for business details as website currently being updated! Our Crazy Owner Builder Journey! Re: who does the design for posi sturt floor joits ? 15Dec 08, 2010 3:36 pm As this post settles into the sunset just a few observations - people obviously ask questions on the forum to gain information. If I were asking for help I would expect or hope that the answers given were sound. Before replying to a question, take a few seconds to ask yourself - am I qualified to provide a quantified answer. 'Posi-Struts' are an 'engineer' designed product and many firms such as ourselves make use of their span tables to provide final documentation on structural drawings. The answer to elchagie's question, basically, is anyone competent to interpret the span tables and apply them to the construction requirement. Many Building Designers that I have contact with would include this type of documentation as a part of their overall design skills. Peter Clarkson - AusDesign Australia www.ausdesign.com.au This information is intended to provide general information only. It does not purport to be a comprehensive advice. CDC Housing Code 3 When to apply Floor Area external face of wall vs Gross Floor Area internal face of wall. Reading thru CDC Housing Code 3, lets take a lot 915sqm.… 0 16558 isn't a garage level with the rest of the house a given? pretty sure they 'came around' long time ago. if you have a flat block, the garage is usually level with the rest… 1 17525 |