All graded preserved for outside use. A useful addition to most decks is the provision of a power source. Seek advice, don’t assume! As an example, It is important not to have too much overhang for the nose of the tread or tripping can be the result. (12mm+ in our example). *This stage requires you to be very accurate, so take your time and don’t rush, it … before the deck, there was an old patio which could only be accessed by steep steps from the house, and had a surrounding retaining wall - double - that doubled as a poor planting area. The end result of a suitable ledger board securely fastened to the wall is what we are aiming for. This can be clearly seen in the side view image of the steps. However, some patterned floors require short, angled pieces of wood to create intriguing designs. Yes, it is the main consideration, but the other important thing to be aware of, is the surface splash of rain up on to the house wall - as is a problem when the patio/deck surface extends too far up the DPC level. Take care with measurements and calculate where your newels will be in relation to the deck boards. Longer, thinner joists will need to be set closer together for optimal structural integrity, while shorter, wider joists can be set further apart. It will weigh approx 2 tonnes. The most difficult job would be the purpose made railing balustrade. C21 grade timber would be ideall. If you do the frame as per these images and pages, ensure that you have the space to maneuvered the cross member bearing into place. 2 Building Code and standards ANY DECK OR BALCONY 1.5 M OR MORE ABOVE CLEARED GROUND LEVEL REQUIRES Fixing a deck to a brick wall demands additional work in to sub deck frame construction, but it will be well on the way to stability, longevity and safety. bearers, joists and decking, and for the gaps that will develop between the decking boards. Rectangular galvanised plate washers are ideal for this 50x50m. Read the points below and fully understand before you proceed. A raised deck abutting a wall has the advantage of being held fast on at least one side to help with this stability. The stringers are pre-made, taking into account the rules and regulations for tread width and riser height which will be a necessary consideration if building controls are involved. masuzi June 20, 2018 Uncategorized Leave a comment 47 Views. This base structure will be raised on to 75x75 (3x3in) tanalised posts sunk and concreted into the ground. Leave a gap where they meet the house to allow for moisture to drain away. All of the timbers were bought from local supplies including builder's merchant and nearby DIY stores. You can find tables and calculators online at sites like Ace Hardware and Best Deck Site (see Resources). The basic rule for decking as with most DIY jobs is, if you are not sure - STOP. This should leave the actual screw thread available to push the wall plate over. The damp proof course line on the wall is the essential datum to work from. As is normal for this type of deck, softwood timbers were used in the frame joist, bearers and of course the actual finishings with deck boards and balustrade surrounds. As it protruded from its fixing surface on the deck, it was positioned under the front overhang to prevent accidental damage. all screwed and bolted together to make a solid deck.) How to cut the holes in the deck where the newels poke through. When building a raised deck – even if only slightly raised – there are two basic methods of ensuring that the deck is stable. All timber used was pressure treated at source, and all resulting cut were either treated with liberal coats of preservative, or where necessary - 'End Seal' fluid. Ease of access to the deck and then to the garden was the main consideration, for access to the garden was both dangerous and non-appealing. Building a deck in a garden, from start to finish. All joists and bearers were treated with Tanalith at source - giving a 15 year plus lifetime. JOIST SELECTION CHART Joist Size Maximum joist span between bearers at specified joist spacing 450mm 600mm 90 x 45mm 1.15M 1.00M 140 x 45mm 1.85M 1.60M 190 x 45mm 2.50M 2.15M 240 x 45mm 3.15M 2.70M 290 x 45mm 3.80M 3.30M Far better to re-tighten the screws after a settling in period. Most composite and PVC decking brands, like Trex and Azek, recommend a minimum joist spacing of 16 inches OC. Naturally you have to get the supports in exactly the right position before concrete is poured. (The overall depth of the timber 'platform' will be 288mm (11.5in.) If it is a free standing deck, then carefully allow for working around the newels at the design stage. Not only will wood warp or crack under less than optimal conditions for their species, but if you live in an area that gets heavy snowfall each winter, then you must also take into account the overall dead weight that the deck must hold, sometimes for months at a time. The decking project more or less finished with a view of the balustrades over well laid decking. Mistakes can be at least expensive; at worse dangerous!. There are alot of Composite WPC Decking Boards available on the market, we suggest you shop around for the best deals and then compare it with the price of wood. Over-tightening of the bolts would then lead to the bolt heads biting into the timber, and in extreme cases could result in the bearers or joists splitting under the pressure. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Unseasoned decking boards should be laid tight together, with subsequent shrinkage creating the required gaps. This 1st delivery of timber account for most of the raised base section. In the video DIY Creators have used Trex Decking, a Composite WPC Decking Board, depending upon the quality, this can be very expensive. Firm fixing of the balustrade to the upright newel supports is essential for raised =- and other - decks. It doesn't matter what you call it -- it's still a critical calculation when it comes to building your new deck. The numbers in the 450mm column refer to the distance that the joists are required to span between bearers. Alternatively, joists may be installed in line with bearers and/or ledgers and fixed with proprietary joist hangers in accordance with manufacturer’s recommendations. Stump and Bearer Layout. generally the pro decking installers use nails for speed and to a certain extent, the visual effect. this also includes and washers used in the project. As can be seen in the 'before' photo, something needed to be done about the dangerously steep and shallow steps, and the old patio which was gradually being encroached upon by overgrowing shrubs. They should also be allowed to full set, before trying to fix the sub frame deck base to them. (Span tables on reverse side) The deck staircase mad for an interesting and very practical feature at deck end. The image shows a neatly finished cut around a newel post, where care had been taken earlier in the construction to ensure that the newel was positioned between two decking boards. IMPORTANT ### make sure the fixings you use have a protruding screw thread which is several mm longer than the depth of the wall plate. Do your research and then go ahead. The deck timbers will be screwed to these. Decking project 8 sees the work being done on the balustrade - in particular the accurate cutting of the decking balustrade top and bottom rails. You are providing for the long term stability and safety of the raised deck. Corners in particular need to be thought out - especially where there is a balustrade to be fitted. Framing timbers on the ground or lower than 150 mm should be termite resistant and in-ground durability Class 1 or treated to H4 or better. Bearers will require their own independent support posts to ensure strength and stability. Overhang looks better and can be further enhance by using a fascia deck board on both edges attached to the stringer. Depending on the working height, bearer size and span and type of timber deck you want will dictate the best size and span of joist. There are additional tools required, and this operation is best carried out with someone who has good building skills and also comfortable with the power tools to be used and knowledgeable as to the type of fixing bolts to be used. This allows the frame to be fully stabilised once positioned axactly. No need to be dragging a power cable behind. The give extra stability to the treads, it is a good idea to use an off-cut deck board or joist under the tread as a central strengthening extra. Lay decking In this case, the timber going across the page are to be 50mm x 150mm (6x2in ) tanalised joist timbers, which will be fixed to the house via a 6x2 wall plate with galvanized joist hangers. If you feel competent, and it is your own property, this type of deck fitting is an easy enough task. The same is true of a decking project such as this. Cut joists to length and square. An additional set of decking joist were affixed to the top of the basic frame, running across the house so that the client's desire could be accommodated without too much additional work involved. This garden decking will be raised, owing to the variation in levels - as can be seen from the first image of the site. It is the main construction technique to ensure that your deck fulfills its function for many years, and above all is safe from possible collapse. Deck Bearer And Joist Span Tables Australia. It is normally a good idea - on solid ground - to more or less complete the sub deck frame, and raise it to finished position, securing with good screw clamps - before concreting the supports. All bolt hole were treated with preservative after boring to minimise the risk of decay around the bolt fixing. For most, it would be best to position the bearer whilst the frame is in the process of being made. 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