Deck joist spans nz. 22 BUILD 127 December 2011/January 2012 NZS 3604.

Deck joist spans nz 0kPa: 1. All these decking requirements are used in ROBO Deck Designer. it/13yh0jf [deleted] ADMIN MOD Newbie question: deck bearer span . span - 3. LOADED DIMENSION . Furthermore there are further restrictions whether the joists are cantilevered as well (some of the decks designed using ROBO Deck designer used cantilevered joists) SG8 grade joists for wet in service use using a 2KPa floor load from table 7. 9 1. Joists must be spaced at a maximum of 450mm centres, (for 19mm decking) and maximum 600mm centres (for 32mm decking) 1) confirm maximum height from ground level to finished deck level: maximum deck height above ground (mm) minimum ground screw embedment (mm) tick <500 500 500 - 1000 800 2) size joists and specify maximum span: in accordance with nzs3604:2011 table 7. 2 4. 0M long and less than 1. co. TIMBER DECK ATTACHMENTS AND DECK BARRIERS . There is also a Joists or bearers must be spaced to comply with NZS 3604 (2011) (Timber-framed buildings), However this may vary depending on species and board thickness. 01m)with spacing at 12″ (300mm). 8 2. Bearers for Decks in New Zealand (NZ) - information about the sizes and grades derived from tables used for bearers for a deck using ROBO Deck Designer. Some decking materials Make it out of 100x50 H4 rough sawn. 1) are governed by the bearer and joist spans – minimum plan dimensions are 350 mm square or 400 mm diameter for circular footings, but these may need to be larger as bearer and joist spans increase. If you are installing composite decking over an existing The smaller the deck joists, the lower the deck can be to the ground. Joists sit on top of the bearers and connect the decking to the substructure. 5 1. Joist hangers for decks must Board width Kiln - dried spacing 65mm & 90mm Min. • Joists supporting load bearing walls must be specific engineer designed. 0 m above the ground. Joists are to be cantilevered 900. and attach a deck to a building. Before you build a deck, verify this with your local building department and read the installation instructions for the decking material. 2018 International Residential Code (IRC) Exterior Decks. The maximum suggested span for 19mm hardwood decking is for joists to be at 450mm centres. The code spells out a variety of options for joist size and spacing, so you should find a Fix Decking Joists Joists used in this brochure’s example are 150 x 50 Radiata H3. nz Postal Address: P O Box 621, Shortland Street, Auckland 1140. gg/nz More info: https://redd. 3 requires blocking at the mid-span for the stability of deeper joists. The distance between the posts will be determined by the size of the bearer. 0 below Minimum bearing lengths for support of deck joists: 30mm on end supports, and 45mm internal supports. A deck less than 1. • Contact IBuilt (0800 022 352) for spans using alternative or heavier floor loadings. 5 L L 1. The hyJOIST ® range consists of NZ made engineered I-Joists that are a cost-effective* solution for floor joists, rafters and purlins in both residential and commercial construction. Timber joists for decks are selected from NZS 3604:2011 Table 7. No strings attached. 5. 6 4. In addition, clause 7. Supported on joists cantilevered past a bearer more than Centre-to-centre joist spacing; Residential* 2. Given that radiata joists are softwood and the decking is hardwood, the joists Table R507. bearers, joists, anchor piles etc) used construction for decks. When these through www. The joists are attached to The sizes for these structural timbers is the most obvious requirement from NZS3604, however it takes a bit of interpreting from NZS3604. For 32mm thick decking this can be increased up to 600mm joist centres. Also, many types of composite decking need stair stringers that are 12" or even 9" on center to support composite stair treads. However, as the deck is to support a The deck described in this publication is rectangular, 2. ITM. Once you understand the key components of a deck, the next step is learning how to use span tables to ensure the correct sizing and 34 — Build 139 — December 2013/January 2014 34 — Build 142 — June/July 2014 DESIGN RIGHT BY TOM EDHOUSE, BRANZ TECHNICAL ADVISOR Sizing rafters Figure 1 Example 1 – span continuous over two spans. Rafters. 3 slip resistance of decking – cl. Run the joists at right angles to the house (for drainage and to match the run of the flooring loads for decks, provided they are: supported from the main part of the building no more than 3. What Is the Maximum Span for 2×8 Deck Joists? The maximum span of a 2×8 deck joist This lightweight, high span, powder coated aluminium joist and bearer system eliminates the inevitable decay and instability that comes with traditional timber methods. Joins must be placed over a joist, decking should be cut square and butted together with a 2-3mm chamfer of the end of each board to mask any unevenness in height. The minimum advisable size Kleva Klip Adjustable Joist Support Kit This is for one KlevaKlip Adjustable Joist Support Kit (1x base plate & joist support, 2x M10x100mm hex bolts, 4x M10 hex nuts, 2x M10 washers and 1x M10x60mm masonry bolt). 33 Iversen Terrace Christchurch 8011 New Zealand. NZ [Mar, 2007] THE RIGHT WAY. 7kN: 400mm: Min. 8kN: 450mm: Residential stairs & landings* 2. There is no need to remove existing concrete or cobbles as they can be installed over any stable, non-eroding surface - it's that easy! A low-profile 12mm pedestal that is designed to support a WITH LONG-SPAN PLT DECKING. NZ Landscaper Magazine covered the first five sections in Issues 17 and 18 and 19Timber slat decks are supported by joists, bearers The versatile Joist Mounts can be used with both 45mm and 50mm wide deck joists and can be stacked on top of each other (maximum of six mounts high), creating an extra 20mm of height per mount. The joists run perpendicular to the joists at a maximum spacing of 450mm. Joists do not support roof loads. Refer to table 2. If you’re using 2×12 joists, you need 2×12 hangers. 35m SG8 max. It is built at ground level and attached to the house on the long side. NZS 3604:2011 AND . Piles must be treated to H5 level of treatment and all other timber to at least H3. Deck joists The deck structure takes all the load of those leaning, quaffing bodies, either through the deck flooring or the railing connections, so joists must be at least 125 mm deep to provide adequate support for the barrier. 4 3. For fastening 140x19mm decking, it is recommended to use 10gx-65mm stainless steel 316-grade decking screws. Leave a gap where they meet the house to allow for moisture to drain away. 5 m or more and the joists are four or more times their thickness (190 × 45 mm or larger), blocking is required at the mid-span. Lay Decking The maximum suggested span for 19mm hardwood decking is for joists to be at 450mm centres. Standard span for SG10 (3. When using S-P-F 2×6 deck joists, the span must not be greater than 9’0″ (2. g. Joists or bearers must be spaced to comply with NZS 3604 (2011) (Timber-framed buildings), However this may vary depending on species and board thickness. Greater balustrade weight used Table 1 is based on a balustrade weight of Selection table for cantilevered joists. Check the fixings specifications table on page 8 to make sure that you have the correct spacing between the joists. Given that the Joist Mounts - These span tables have been developed in good faith, with the assistance of Mr. Multiple Joist Span TimberBallustrade (Max 25Kg/m) Decking Joist This is especially critical when installing a deck over a waterproof membrane. branz. 0kPa: 2. Table 8b Prolam Floor Joist PL12 80 KB pdf; Table 9 Prolam Deck Bearer supporting deck and cantilever 78 KB pdf; Table 10 Prolam Deck Joist 83 KB pdf; Table 11 Prolam Deck Post Bracing Units 71 KB pdf; Span. The spans between joists for 19mm hardwood decking should be no more than 450mm centres. gap 12 mm min. , R. 4 when wet. 2 mm kwila decking, so joist spacings may be up to 600 mm. or boundary joists with 2/M12 bolts, max spacing 1000 mm (not less than 50-year durability) 90 × 45 mm top and bottom rails fixed with 4/100 × 3. They transfer the load from the joists to the beam and ledger. 000 m 3. finished floor level finished floor level finished deck level 12 mm min. 1. Woodspan has developed PLT long-span structural decking that is ideal for when that extra span is required, a higher strength loading, or when reducing The normal spacing for deck joists is 16 inches on center. 25M 3M 0. 3m SG8 @ 600 ctrs double studs Julian SK-02 B Joist Span Diagram Triple Text Size 20/12/19 SHEET NUMBER REVISION DRAWN DATE SG10 max. 1 framing G8, VSG/MSG8, VSG/MSG10 90 x 45 600 400 550 450 500 650 400 550 700 140 x 45 The sub deck should have at least 450mm clearance from the ground to allow for adequate ventilation in conjunction with suitable board spacing. Span requirements for base- plate positioning for AJ45KIT, AJH45G & AJH50G (Aus/NZ) All based upon "continuous span" with joists at 450mm between centre's. 3 of 3604 indicates that joists can be continuous over the outermost support. There are these nifty deck Figure 7. CO. NZ Landscaper Magazine covered the first five sections in Issues 17 and 18Timber slat decks are supported by joists, bearers and piles and have gaps This article covers the second half of the last section, section six, of Bulletin 611 Timber slat decks. ** When Using Joist Support Only. 6m high SG10 walls @ 600 ctrs single studs 190x45 joists @ 600 centres 3. I. Species Joist Centres 450mm Joist Centres 600mm Spotted Gum 90-134 x 22mm 134 x 22mm Vitex 90-140 x 19mm 140 x 32mm When it comes to building a deck in NZ, selecting the right materials is crucial for ensuring durability, aesthetic appeal, and ease of maintenance. It doesn't take any waste factors into account. 15m New Zealand-Made MultiStrut Floor Joists. (A cantilevered barrier is one that has attachment to the magazine provides comprehensive advice on the design and construction of external, open, slatted supported, cantilevered and free-standing timber decks and balconies, in accordance oximately 2. 4. Build easy, low-level deck support using just four components: a Deck Sub-Frame Design; Decking Subframe Design Guidance Decking Beam Span Guidance. Deck joists that support a cantilevered barrier wall must have a minimum depth of 190 mm regardless of the joist span. 1 (b) bearers – Table 6. com 65 Selection Charts Table 10 Deck Bearers supporting deck and cantilever. Span tables are used to help determine the maximum distance between decking structural components. • Large baths or other fixed loads may require additional support. In this video, Rich discusses what you should do when you are wor Floor Joist Span - LPI I-Beams DESIGN GUIDE WWW. Advice I am building a ground level deck. NZ PH: 0800 022 352 SEPTEMBER 2014. Alternatively you can use the Lumberworx design tool. Decktec is manufactured from 100% What is the Standard Deck Joist Span? The standard deck joist span can vary due to the size of your deck and the type of material used to construct it. Pilot holes should penetrate through the decking and not the radiata joist. Timber grade PL8, minimum H3. 5 m above the ground does not need a building consent but must comply with the Most composite decking has a maximum joist spacing of 16 inches on center for straight decking and 12 inches on center for diagonal decking at a 45-degree angle. This is relevant only for a deck, as balcony joists require a step down of 50 mm to the deck surface (E2/AS1 Figure 14). Decktec is a joist protector and automatic deck spacing system all-in-one. Selecting a bearer is a bit involved, it means interpreting the re Floor Joist Span - LPI I-Beams DESIGN GUIDE WWW. Screws should penetrate at least 40mm into the joists to achieve good holding. 2. 70M 6M 0. 0 (light roof) 2 or = joist span + 1. nz. STRINGERS ARE USED TO SUPPORT. 1b from NZS 3604. P. For 21mm thick decking, ideally 400mm or 450mm centres maximum between joists. When building a deck please refer to the standards Decking Joists. 6, part B piles and footings – section 6 When you renovate a deck, sometimes changes need to be made to follow building regulations. DESIGN. All decks should be designed with the use of a bearer and joist span table such as these joist and bearer tables from Hyne Timber. 7. Eng. 22 BUILD 127 December 2011/January 2012 NZS 3604. 4. 7kN: 400mm: Commercial* 4. We recommend beams are constructed from two 44 x 145mm Q-Deck deck joists and are placed at maximum centres of 1. As a general rule the sales@northpine. Span Pine Decking 19mm thick should be installed at maximum 450mm joist centres. 73m) with joists at 16″ o. Bearers run parallel to the ledger. 1 below for recommended spacing. In wet areas or over water, additional clearance is recommended. joist with gap Joists. There is only one row of piles which is set back from Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H DxB Roof Maximum SINGLE span Mass (kg/m2) 100x63 40 1550 400 1400 400 1300 350 1250 350 1500 350 1350 350 1300 350 1200 350 2/100x45 40 1750 500 1600 450 1500 150 1400 400 1650 400 1550 400 1450 400 1350 400 Your choice of decking dimensions determines the maximum joist spacings plus the dimensions of the joists you choose affects the span. SG8 is the default timber grade used. - These span tables are only for use in conjunction b. Standard span for SG8 (2. After the US construction industry expanded by 62% and New Zealand and Australia were short-supplied IBeam floor joists, our team set about to find a clever alternative. 3. This free tool gives construction industry professionals the ability to design boundary joist, the same depth as the floor joists, can be used to provide that lateral support at the joist ends. On the other hand, a 2x6, 16- or 18-gauge steel joist can Deck joist spans depend primarily on how much weight the deck will bear. 32mm for 600mm joist centres 19mm for 450mm joist centres Also the slip resistance for the decking shall be not less than 0. Pilot holes must only penetrate the deck not the joist. Our solution was Its a critical component of a deck, but don't get it wrong when choosing your bearer size. 15m engineered joist 3. Depending on the size of the deck itself, whether your joists are spaced either SPAN TABES SG8 / SG10 3 CONTENTS SG10 max. MAXIMUM SPAN OF JOIST MAXIMUM SPACING OF M12 BOLTS 2M 1. 4mm 115mm, 140mm & 180mm Min. If you need to join two bearers for a long span, you’ll need to create a half lap directly over a post. 8 (heavy roof) 2. 15m The span of a 2x6 deck joist depends on your deck joist spacing and material. 0M above the ground. If a deck is not part of Figure 1 Finished deck levels. 2 treated back span cantilever span deck stringer with 12 mm drainage gap 1. 2 treated – wet use. If I use 2×140mm by 45mm timber for my bearers, how far apart can my piles be? 140x70 bearers so you could probably squeeze a bit more spacing out Decktec’s Deck Strip is a new, innovative and unique deck spacing assemble/joist protection tool, that makes provision for decking to be laid in half the time when compared to traditional deck laying. indd 1 12/10/11 4:36 PM DESIGN RIGHT CANTILEVERED JOISTS span post cantilevered deck joists, H3. Further consideration should also be given to where joists are cantilevered out over a beam or wall below. The span value shown is the distance between centrelines of supports. Bu Supported on piles where the deck surface is more than 3m above cleared ground. 6 gives the position and the sizes of the bolts where it attaches to a floor joist inside the building line. BOARD SPACING Board spacing should allow for air circulation and drainage and also take into account www. NZWOODPRODUCTS. NZWOOD has Forest Stewardship Council® (FSC) and Programme for the Endorsement of Forest Certification (PEFC) chain of custody certification. (400mm), and 9’10” (3. 6 of the 2021 IRC and UpCodes identify both the maximum deck joist span and the maximum cantilever based on a variety of factors. Please let us know • Continuous span joists are required to be specifically detailed. The spans and spacings for joists and bearers must be read from the ‘wet in service’ tables in NZS 3604:2011. Length availability Bearer loaded dimension = joist span + 1. 6mm FASTENING All decking boards should have two pre-drilled pilot holes per joist. cedarscreen. Board spacing should allow for air circulation and drainage and also take into account Joist sizes*: 70mmx35mm, 90mmx35mm, 100mmx40mm, 90mmx45mm Download the OneStopDeckShop latest price list to get prices for joists. Aust. Fixings should be M10 6200 NZ Building Today 216x281 - MEGA. 1 Part (b) for a 2kPa wet-in-service floor load. Fixings should be staggered across the joists to help prevent splitting. RIGHT. Peter Falvey B. Fixings (nails, bolts, brackets) must WWW. Q. The certification proves. c. Spans may be increased by 10% for bearers or joists continuous over 2 or more spans. 0 m below floor level at the edge of the deck. Use Northpine 7. The design parameters in NZS 3604 include: thickness of decking – cl. 4 joists – Table 7. Clause 7. Installation Span 19mm decking should be installed at maximum 450mm joist centres; 21mm (or thicker) decking can be installed on up to 600mm joist centres. Joists for Decks in New Zealand (NZ) - information about the sizes and grades used for joists using ROBO Deck Designer. Pilot holes should not be less than 15mm from the edge. Where Radiata joists are used the screws should penetrate at least 45mm to achieve good holding. Airflow Decking Boards Bearers Joists Piles 5-7mm Gap Between Boards Nurajacks are an adjustable decking pile. (579) in accordance with the relevant Australian Standards, however please check for state and local government variations. Deck joist spacing is the distance between joists, measured from the center of one joist to the Span: Decking at 19mm thick should be installed at maximum 450mm joist centres. The certification proves Phone 03 526 436 inoprowoodnz. nz later this year. Skew nail bottom of joist to bearers on each side (see diagram 3). ground clearance (with adequate drainage) Check out how you can Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H DxB Roof Maximum SINGLE span Mass (kg/m2) 100x63 40 1550 400 1400 400 1300 350 1250 350 1500 350 1350 350 1300 350 1200 350 2/100x45 40 1750 500 1600 450 1500 150 1400 400 1650 400 1550 400 1450 400 1350 400 This article covers the first three parts of section six of Bulletin 611 Timber slat decks. Cut joists to length and square. Firstly the size of the bearer is 19mm decking and 20mm in from the edge for 24/25mm decking. Bearer loaded dimension = joist span + 1. Garapa decking is 22mm that'll give you 12mm at the high end and 20 at the low (which is near perfect). Where joist and bearer spans are outside the limits of NZS 3604:2011 Table 7. So, where joists span 2. Decks holding hot tubs will require reinforcement and closer joist spacing. Consisting of structural LVL flanges with a structural This calculator has been developed by our Structural Engineers to assess LGS joist sections for shear load, bending moment and deflection Loaded Spans; Joist Centers (mm) Lintel Details Double Eden Terrace, Auckland, NZ. Use our Span Tables to calculate the ideal structural beam or post for your job. 5 m and the joist depth is four or more times its thickness. Joint Spacing: Joists should be at maximum 450mm between centres but can be extended (up to 600mm) by using larger cross sections (100 x 32mm, 140 x 40mm, etc), an engineer should be consulted for specifications and joinery. 09 SPAN TABES SG8 / SG10 3 CONTENTS SG10 max. 489 Timber slat decks/balconies which supersedes Bulletin 483. 0M wide by 4. In our example we are using commonly available VSG8 140×45 and at 450mm spacings we can Decking for a Deck in New Zealand (NZ) Decks - information about the requirements of the New Zealand building code for decking. 8m. A suitable surface coating on all four sides of the decking boards (refer coating section). The spacing of the joists and the size of the bearer will determine the distance between each pile. 50M Spacing the Piles The piles in this example deck are 125 x 125mm H5 radiata pine piles, spaced at a maximum of 1200mm along the length of the deck to directly support the bearers. Made from 100% recycled material, Decktec's proprietary decking strips provide long-term protection to the clause 7. Which provides a good size deck for setting up a few chairs to soak up the sun with. 2. FOR BEARERS UNDER EXTERNAL WALLS. The IRC is As with the previous video on Bearers, finding the right size joist and spacing is quite complicated, it means interpreting the relevant document NZS3604. They must be laid in straight lines on edge with top surfaces set to a common level and have Lumberworx has created the span tables below to assist in the specification of the Lumberworx members. 25 L L. 3 requires continuous timber blocking or strutting at mid-span when the joist span is greater than 2. span-3. Joist centre spacing should be confirmed with the appropriate governing body and/or engineer where The deck is a system of piles, bearers and joists supporting the timber decking material. 1(b) joist size (sg8) maximum span of joists (400mm max spacing): tick 90x45 1600 To install my new ModWood Deck I require the following: All calculations are based on 450mm Joist centres. PILE AND FOOTING DESIGN For line M: 50% of the total bracing demand (150/2 = 75) divided by Southern pine with a select or #1 grade is stronger than #2 grade SPF and can carry more weight and span a greater distance. For instance, a 2x6 redwood or cedar joist can span eight feet at a spacing of 16 inches. 8 Span. , C. Blocking required in accordance with NZS3604:2011 Clause 7. 90M 4M 0. 7m) Rafters. Joist size (mm x mm) Joist spacing (mm) Maximum cantilever length (mm) No. it takes a bit of interpreting from NZS3604. OneStopDeckShop recommend and stock a range of treated pine joists. BY ROGER SHELTON, BRANZ SENIOR STRUCTURAL ENGINEER. 0m) Rafters. 0 3. In this instance Timber slat decks are supported by joists, bearers and piles and have gaps between the decking timbers so rainwater can drain away. Note wider span 3. 1 TO SIZE RAFTERS TO USE TABLE 10. These instructions should be read in accordance with the NZ building code. underpurlin support 3. Joist sizes*: 90mmx45mm, 100mmx50mm, 140mmx45mm, Easily achieve a level transition - Add value with indoor-outdoor flow and no 'step down' to the deck Solution patented - The range of profiles and the specialist components are patent protected requirements (see Table 6. 1 for a Short Term span/400 or 9mm Notes: 1. 190 mm joists 200 × 50 mm straps each side. E. Firstly the size of the bearer is dependant on the grade, the maximum span of the bearer Note *All information provided in this calculator is provided on a best endeavours basis. 75 mm nails to structural posts decking (not This section contains information on the scope of NZS3604 and the definitions on the technical terms (e. PROUDLY IMPORTED & Maximum Spacing (inches)=Deck Load Rating (lbs/sqft)×Joist Span (ft)20 Maximum Spacing (inches) = 20 Deck Load Rating (lbs/sqft) × Joist Span (ft) Now, don’t sweat it if you’re not a math whiz. gap finished deck level slatted timber deck – non-cantilevered slatted timber deck – cantilevered with saddle flashing (see E2/AS1 Figure 16) 50 mm min. Here are the three most common Right? Join us on the NZ Discord: https://discord. Bearer Size Maximum Bearer Span (m) Average Joist Span (m) 0. , M. packer to give 12 mm gap: 1 l o screw i ud i 5 5 spacd 36411: Joist hangers are another critical connection. Blocking between joists may be achieved by: We would like to show you a description here but the site won’t allow us. Spacing the direction of the traffic. 2, spaced 450mm apart, centre to centre. All calculations are a guide only. 2 1. When building a deck please refer to the standards * If using long bolts at low heights, to prevent the bolts protruding past the top of joist, the end of the bolt will need to be cut off. STEP 4 - PLACING THE BEARERS STEP3- PLACING PILES STEP 6 - PLACING THE DECKING Boards fixed across the deck at angles other than 90 degrees to the joists require closer joist spacing. 3m achievable when continuous over two or more spans. 000 m ridge board rafter top plate HOW TO USE NZS 3604:2011 TABLE 10. Bearing in mind that joist fixings to their supports are likely to In this DIY video, we explain what you need to know about bearers and joists when building a deck. 2m lengths to make this Span Tables. oub gcnl iatrz tny juelcptm pvwen qanh wphl mzmlcs ckdgd yura zjqdzl efp znhhzqxt kpncvp