Thank you for making this great site.ġ20 + spindles, 2 staircases. This is a pavilion I built in Baton Rouge using the hip calculator. Usually build a couple boat houses during winterĪnd is my go to calculator! They really make cutting hip rafters right the first time a breeze. I have used the rafter calculator on two of my projects. Here are some shed pics as promised - was used to design theįrankly speaking, I couldn’t build this hip roof without your calculator. fascia w/12" overhang at eaves and 8" at gables. fence boards for vertical reverse board/batten sidingĢ圆 p.t. 24/12 from wall plate to break, 6/12 at the topĨ' p.t. Used your gambrel roof calculator with some modifications back in May 2016.ġ2/12 pitch at the overhang. Your calculations must be accurate because it works perfectly. I built a honey extractor out of wood and old bandsaw blades. Just finished stairs for my deck, without your calculator it would take me a lot of time to figure how to cut it right. Your calculator was used, very useful and easy, and the arches have turned out great! I’ve attached some pictures of the project and the final result!īuilding our new kitchen wall, 2 arches, 1 for access to kitchen, the second as a breakfast bar. The stairs are about 1 million times more sturdy than the pre-existing ones and my parents are so incredibly impressed and grateful. I found it so useful to be able to tinker around with potential ideal rises and runs, tread thickness, riser, thicknesses, and nosings and see how it would impact our final product. In any event, this was our first set of stairs that we’ve ever built and it’s no easy task for a first timer. My wife and I designed and built a set of stairs for my parents, as their existing stairs were not up to code, and had been badly built. I just wanted to let you know that I found your stair calculator incredibly useful. I'd like to thank you for the help I obtained from your site in building stairs for my shed. If you've benefited from this free service, Please help us support For the last 3 years I have used and it has saved me hours of math and questioning my math! I used to do all the math by hand with a sheet of paper. I work for a fence company and build a lot of Spiral Staircases. (I’m a driver in the RAF, definitely not a joiner!) Just got to add the jacks, sheet it and tile it now. Literally couldn’t have done it without your calculator. Hi, I’ve been building this gazebo in my spare time after work and at weekends. I constructed my gazebo with the use of the gazebo online plans. The calculators saved me quite a bit of time. plasterboard on the underside of the rafters the effects of deflection under concentrated (point) load do not need to be considered as per guidance given in BS 5268-7.5 clause 4.3.All of the dimensions were exact. The imposed load should be calculated in accordance with BS 6399:Part 3:1988 Code of practice for imposed roof loads, as a rule of thumb for altitudes not exceeding 100m you can use a uniformly distributed load of 0.75 kN/m² and for most other areas exceeding 100m but not exceeding 200m you can use 1 kN/m², for parts of Scotland, Pennines, North East England and heights over 200m you will need to refer to BS 6399 Part 3.Īs there are no brittle finishes e.g. Rafters are to have minimum end bearing of 35mm. Wane as allowed in BS 4978:2007+A2:2017 is permitted in all sections included in these span tables. Timber to be covered, these span tables do not apply to timber which is fully exposed to the elements. Holes and notches cannot be drilled or cut into the rafters unless proved adequate by specialist calculations. The calculations on which these span tables are based conservatively assume that the rafters are not continuous over the purlins, but they can be continuous over the supporting purlin if required. These span tables are based on the assumption that the tiling battens fastened to the top of the rafters will provide adequate lateral restraint and also ensure that lateral loads are distributed. It is also assumed ceiling joists will be used to transmit the horizontal component of thrust occurring at eaves level to complementary rafters. These span tables only apply to roof systems with four or more rafters. These span tables do not apply to trussed rafter roofs. The dead loads shown at the top of span table above do not include the self weight of the rafters, however, the rafter self weights are included (in addition to the dead loads) in the calculations used to determine permissble clear spans. The allowable clear spans have been calculated in accordance with BS 5268-2:2002 Structural use of timber - Part 2: Code of practice for permissible stress design, materials and workmanship and BS 5268-7.5:1990 Structural use of timber - Section 7.5 Domestic rafters. Dead load per square metre (in kN/m²) supported by raftersĬentre-to-centre spacing of rafters (in mm)
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