In general, the spacing between rafters is 30 to 45 cm. Batten or boarding’s are supported by this rafter. These are fixed to the purlins at intermediate points. This is also called as ridge beam or ridge piece.Ĭommon rafters are wooden members fixed to the ridge board perpendicularly. Common rafters are supported by this ridge board. Ridge board is a wooden member which is provided long the ridge lie or apex of the roof. Verge is the edge of gable roof which runs between ridge and eaves. It is also a place where two sloping surfaces intersects but the exterior angle is less than 180. Hip is a place where two sloping surfaces meet, where exterior angle is more than 180 o.Īt the end of a roof sloped triangular surface is formed which is called as hipped end. The bottom edge of sloped roof surface is called as eaves from which rain water is drops down during raining. Pitch is nothing but slope of roof with the horizontal plane and is calculated as the ration of rise to span. And these are generally made of wood and are used to fix the common rafters. Wall plates are provided at top of wall or supports. The vertical distance or height of top of ridge from wall plate is called as rise. The apex of the angle which is developed at top by the inclined surfaces at the top of slope. Span of roof is the clear distance between the two supports on which roof is positioned by some other elements. If buildings are constructed with some limited width, then also we can go for pitched roofs.įollowing are the elements of pitched roofs: Pitched roofs are generally used where rainfall is heavy. We know that the roofs are generally provided at top to cover and protect the structure from different weather conditions. Pitched roof is a type of roof which is provided with some slope as structure covering. If you have questions about any of our products, please download a brochure or contact us.ĭon't forget you can always get in touch with our Technical team for any help on your next project.□ Reading time: 1 minute What is Pitched Roof? BS 8000-6, Workmanship on Building Sites, Code of Practice for slating and tiling of roofs and walls. BS 5534, The Code of Practice for Slating and Tiling.With dry-fix systems, the batten cut end is deemed to be within the roof and does not require treating. When set in mortar, a cut batten end should be treated or the batten turned so that the treated end is in the mortar. Below a 200mm gauge, there can be 3 consecutive joints in any twelve courses.īattens should be nailed to the centre of the rafter and any joints should be directly over a rafter with the batten square cut, tightly butted and skewed nailed. Not more than one in four course of battens should be joined over one truss for gauges over 200mm. To ensure this, the battens should be at least 1.2m long. It is also important aesthetically, so that the tiles on the finished roof are equally spaced.īattens should be fixed to rafters set at centres not more than 600 mm apart unless calculated and should span across at least 3 rafters. This is important because the correct gauge and head lap has a direct influence on a tile's ability to withstand the ingress of rainwater through capillary - ensuring that the roof remains watertight. The correct batten spacing is necessary because it corresponds to the gauge and head lap of the roof covering being installed. For example, 25 x 50mm battens are required for single-lap Modern roof tiles laid on rafters with a 600mm maximum span. The updated BS 5534 code of practice for slating and tiling specifies a number of batten sizes based upon the span of the rafters and the product being used. Roof battens are nailed into the rafters (or trusses) and provide support and something to fix the roof tiles or slates to.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |