Browse Forums Outdoor Living Re: Bearer size - 1st post to group 8Sep 04, 2009 9:10 am Dukekamaya nomad 190x45 F7 as a joist spans 2.6 easily but as a bearer spanning 2.8m 190x45 isn't sufficient. A single 140x45 F7 wont span 1.8m either. As a joist 190x45 will span 3.6m continuous and 3.3m single. A 140x45 will do a 1.8 continuos bearer span easily, have used and seen it many times. A friend of mine used 190x45 as a continuous span bearer spanning 3.0 metres with a FLW of 1.2m and they are rock solid - it was also passed by buiding inspectors. My own front verandah I have 190x45 bearers spanning 2.7 continuous, also certified. Another thing which creates variables albeit slight, is that rougher header treated pine is cuurently available as F5, F7 ans MGP10 which all have slightly different spans umm I have 1 table that shows it just does it and 2 that shows it fails (140x45) so I'd rather have a bit of safety factor in telling someone over the internet if it does it or not. "As a joist 190x45 will span 3.6m continuous and 3.3m single" That's strange because at the minimum FLW I have it showing 2.6 single and 3.0m continuous maybe your reading the F17 table and that is under the FLW required by the rldragon. But if your willing to sign of on all of this go ahead. Re: Bearer size - 1st post to group 9Sep 04, 2009 11:07 am Quote: My own front verandah I have 190x45 bearers spanning 2.7 continuous, also certified. Is that a single 190x45 and double up 2 x190x45? Re: Bearer size - 1st post to group 10Sep 04, 2009 11:08 am Quote: "As a joist 190x45 will span 3.6m continuous and 3.3m single" That's strange because at the minimum FLW I have it showing 2.6 single and 3.0m continuous maybe your reading the F17 table and that is under the FLW required by the rldragon. Would the FLW only be related to the bearer span? In Allan stanely book, it shows 140x45 seasoned F7 treaded softwood as joist spacing 450mm will span maxium 2600 mm, and 190 x 45 will span maxium 3600mm. In the timber solution sofware it caculate as 2500mm for 140x45, and 3600mm for 190x45. Re: Bearer size - 1st post to group 12Sep 04, 2009 6:16 pm I'm not looking at F17, I use these things nearly every day. You will find slight variations between differnet programs/tables of 100mm or so. The 190x45mm bearers in use I was referring to are single, not laminated. I have no problem recommending that size for those spans with that FLW, builders use it every day of the week in that application. You need to keep in mind deck spans are over-engineered for maximum large amounts of people on a concentated spot. Whilst span tables wil always show a double-up member for a bearer, they are often not stocked are very expensive and there are issues with nail or glue laminating 2 separate members on site. This is why the majority of the time larger single members are used. Re: Bearer size - 1st post to group 13Sep 07, 2009 11:21 am Balcony's are designed with additional loading but decks aren't unless the user adjusts the loads accordingly but even AS 1684'S deck tables don't have additional loading factored in. The user needs to know to adjust the loading to 3kpa. Seconded; we just used these last weekend to build a small deck. They worked perfectly as we have bluestone in the area where we wanted to build so digging down was not… 8 9277 Hi Mrboh Just wondering if you have any BAL or flame zone issues on your block, as getting compliance with BAL requirements whilst doing bearers and joists is tough. Not… 1 8558 Hi there, We’ve recently had plans approved to add a 1st storey addition to our existing house for a growing family in Sydney. With the current cost of building… 0 4643 |