Some builders reduce joist spacing to 12" on center to strengthen the deck frame or to increase maximum allowable joist spans. We recommend beams are constructed from two 44 x 145mm Q-Deck deck joists and are placed at maximum centres of 1.8m. There are several construction methods for installing deck joists. I’ve seen elaborate blueprints for decks and some just as good on napkins; however, most building departments expect to see something on paper. There are four 6" x 6" support posts underneath the spot in which the tub will be put, they are spaced 5' from eachother in one direction and 7' in the other the spacing on the joist in 12" on center and the lumber on the deck surface is deck cedar I think (but I know its not pressure treated) Thanks! Dimensions stated represent the maximum length of unsupported joists (ie. Check out the calculator below. Any deck supporting a hot tub or other extraordinary load requires Alberta-engineer-stamped design for joists, beam, posts and foundation, and all connections including ledger board connection to a house wall. Additionally, the beam support structure, type of deck board desired, the pattern for installing the decking, and of course, the Building Code must be factored into the decision too. Chapter 5 of the 2018 ICR has a variety of tables that are full of useful information about minimum footing sizes (R507.3.1), deck post heights (R507.4), beam spans (R507.5), floor joist spans based on different dead loads (R502.3.1(1&2)), cantilevers (R502.3.3(1&2) & R507.6), and joist spacing for different decking (R507.7). Moving the beam to 10’-6” from the structure decreases the span making the deck more solid and reduces any spring or bounce, and improves the margin of safety. on an angle. The more elaborate the decking plan, the greater the joist structure requirements. Regardless of the method used, span and spacing depend on the type and grade of the wood, cantilever, beam size, height off the ground, footing size, and live load values. Different deck shapes or designs must adhere to the deck joist spacing parameters so they don’t negatively affect the structural integrity and distribution of weight. Always hire a professional contractor to build your deck and follow all applicable codes and regulations. Downsizing to 16”o.c. The maximum spacing for 5/4 wood and most composite decking is 12”o.c. 1 @ 1'-8" o.c. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. The standard rule for footings is that for a basic deck, the larger the beam and footing size, the fewer footings you'll need. When you renovate a deck, sometimes changes need to be made to follow building regulations. Slow growth trees have more growth rings which means they are denser and stronger than trees that grow more quickly. High Strength: Douglas fir and southern yellow pine will span greater distances. Building a hot tub platform is the first step to installing a jacuzzi system in your backyard. This is not an option, deck finished height will be about 1+' from the ground level. Hi guys I have started building a 2.4x2.4 deck for a hot tub. Strengthening a Deck For a Hot Tub. Lay out a perfect 8 foot square at the location you plan to build the deck. This top tips for building hot tub decks post is from the experts at Real Cedar.com, check them out to see why you should consider authentic cedar for your deck. Re: Jacuzzi Tub on Deck????? So to span 10-feet use a 2×8. spanning 16’-6” between supports may cantilever up to an additional 4’-1 … when perpendicular, and 16”o.c. It also permits the use of 2x8s at 16”o.c. Deck boards that diagonally cross joists at angles such as 30°, 45°, or 60° span a greater distance, and so the deck joist spacing must be adjusted. If you live in a snow-belt and need to clear the deck, it’s easier to push in the direction of the boards than across them. Can a deck support a hot tub? The spacing between joists also influences the type of deck material that can be supported, whether 5/4 or 2-inch thick, or cedar, SPF, or composite decking. The tub weights around 1-2 ton in weight full I have installed 9 4x4 post and timber framed it up the post have Been concreted in a good 14 inch down x 12 x12 wide until I hi a solid surface. Joists commonly are spaced at 12”, 16”, or 24” centers depending on the load the deck frame will carry and the size, type, and orientation of the deck boards. Medium Strength: Redwood, hemlock, and spruce will span almost as far. All posts will be resting on concrete footers. A structurally solid and safe deck is the end product of all the building components, even if all that is seen and admired are the deck boards. The size of the beams and the span between beam support posts, plus the distances between beams and ledger, affect the distance joists must span. Growing conditions also contribute to the variations making timber from one area more desirable for different projects. For commercial applications, joist spacing is 12”o.c. Tags: deck, hot tub, joist load. Designing a deck specifically for a hot tub requires a lot of forethought. 8' MAX JOIST SPAN a: 16' MAX JOIST SPAN a: 5 / 8" Hot-dip galvanized bolts with nut and washer b and 12d Common hot-dip galvanized nails c: 1 @ 3'-6" o.c. By the time you’re finished reading this guide, you’ll have a better understanding of how span and spacing work, and what will structurally work best for your deck. Choosing the right decking material is just as important as choosing the right hot tub. Tall Decks and Hot Tubs. The average 8' x 8' hot tub weighs over 5,000 lbs when filled with water and people. DECK JOIST SPANS FOR COMMON LUMBER SPECIES (ft. - in.) Some equations and algorithms will calculate the span and spacing for joists and numerous joist span tables for reference too. Deck Sub-Frame Design; Decking Subframe Design Guidance Decking Beam Span Guidance. As far as the post size i can not size them i do not know the heigth of the deck or were the tub will set on the deck. The span of the joist (how long a joist is between supports) is determined by the same factors. Additionally, though, the values are also influenced by many factors, including wood species and grade. The shape and size of the deck are primary considerations, along with its purpose. Southern pine is stronger than most other common deck construction wood types and offers the greatest span. See Using These Tables and Design Assumptions for additional information. The greater number of rings per inch results in more compact end grain and better bending strength. Living in a region with heavy snow loads or winds can also increase the live load values, and so should be included in the design considerations when building a deck. Joist Size for Hot Tub Deck. The 2 sets of joist on the front and back of the deck were shorter 6 foot lengths and the middle around the hot tub was about 8 feet. Most calculators allow for the selection of three or four common wood types or species, standard dimensional lumber from 2×6 to 2×12, and on-center spacing of 12”, 16”, or 24”. The greater the span and spacing, the more spongy a deck may feel. Incising is the process of infusing preservative deeper into the wood through small 1/4” deep cuts on all surfaces. Elevated decks often require greater post and beam support for shorter deck joist spans. For demonstration purposes only. Common spacing (how far apart each joist is from the next) for decks are 16 inches, 24 inches or 32 inches on center. Pound a stake at the center location. 2×6 Decking is more costly than 5/4 decking of the same wood. Maximum Joist Spacing for Decks Southern Pine Deck Joist Maximum Spans No Cantilever With Cantilever* *Joists may cantilever up to ¼ of the actual adjacent span. For example, a 2 x 12 joist placed 16” OC. when laid perpendicular to the joist and 16” on the diagonal. See all of our free deck plans here. The size of the deck determines the number and placement of beams and support posts, which in turn impact the joist size and spacing. Many composite decking brands and all 5/4” wood boards are limited to 12”o.c. Re: Hot tub load on existing deck. The height off the ground, wind-load, snow-load, soil-load capacity, and potential seismic forces also factor into the span. by John Stuart (Calgary, AB) I'm struggling to find the appropriate materials for the lower portion of a 2 tier deck that will be supporting a hot tub. between beams or slab etc). How to Build a Tub Support. Before you get swayed by features such as colored LED lights, integrated cup … The formulas have been used to calculate the spans and spacing on different tables in the Building Codes, and are the values used by different calculator algorithms. The spacing reduces to 12”o.c. I'm going to put a hot tub on the deck, on one end. The IRC reflects proven construction techniques for wood decks using widely accepted conventional construction materials and practices. Start by deciding the location of your deck, bearing in mind factors such as sunlight and privacy. or less spacing, and 2” planks are limited to 12”o.c. Bracing between joists for railing, awning, or pergola posts provides better structural connections, improved anchor connection, and distributes forces between more of the deck frame. However, if your deck will include a hot tub or roof, you must support that weight with additional footings. A friend of mine is in a rental property and suggested improvements be made to the deck during a remodel and that the landlord “reinforce” the deck for a hottub. The type of decking selected may require special fasteners and tools too. Cedar has a natural wood preservative that protects from rot and insects. Either way, experts recommend that you select your hot tub/spa before making any structural or design decisions regarding your deck. Because decks shack. for 2×6 deck boards. A deck is an outdoor living area and enhances the look and character of a home. 2. Default is 50 psf which you can change. According to the manufacturer, the weight of the filled tub with five people in it will add about 94 pounds per square foot of weight to the deck over a 45- square-foot area. by John Stuart There are many considerations before undertaking a project such as this. My preference is to use span and spacing values readily available in Code tables or calculators. In many building supply stores, the choice of grade and type is limited. He writes: I am building a deck that will hold a fiveperson hot tub. The lower deck structure is 10'x10' ledger to beam construction. When planning a deck, consider the direction the deck boards are to go. The width, thickness, wood type, grade, and spacing influence the span a joist can bridge. It is better to go shorter than to try and maximize span bridging for a more solid and secure platform. Hot tub measures 80" square. Joists distribute the weight of the live and dead loads of the deck to the supports. The girders need to be strong in the tub area. joist spacing increases material cost between $70 for 2x8s and $100 for 2x10s. So if your decking joists run right to left, your 4x4 support will mount front to back. at right angles. The joists need to be spaced 16”o.c. Most decking is not strong enough to support longer spans than 16". The height available from ground level to entry-level may trigger the need for landings or the inclusion of a lower deck. There are invisible fasteners for securing the boards to the joists, or two 2-1/2” screws or nails through the face into every joist. There are three ways to determine deck joist span and spacing – formula, calculator, and joist sizing and span tables. And that is without a hot tub sitting on them. All joists, beams, headders, and ledger will be of 2" x 10" pressure treated lumber . You can mount them using metal hangers made for this purpose. 7. The cost difference between 2x8s and 2x10s is approximately $7.00 each. Note: If rim joists are connected to the house, as they would be in Figures 2 and 3 they should have additional lag bolts installed in line with the hot tub or spa footprint. Mount the 4x4s perpendicular to the existing joists beneath the deck. But decks 2 feet or higher will need added support. Bachelor's Degree. Composite decking is commonly 5/4” x 6” and fastens to joists using invisible clips. The boards and furnishings rest on a deck frame of joists supported by beams, ledger, posts, and footings – all are important. Although 2x4s may be used for low-profile joists near ground-level they aren’t normally included in structural joist tables. Spacing also impacts the distribution of weight, influencing the structural strength, and deck integrity. for boards laid at an angle to the joists. Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - lumber sizing and joist/beam spacing for hot tub deck - I need to build a deck that will support a 7'X7' hot tub. when laid diagonally to joists, and 16”o.c. Also, there will be wooden girders running perpendicular to the joists. The spacing between joists is 12”o.c. The deck must be low to the ground. and 2 @ 8" o.c. Join in and write your own page! – and is normally rated at 40psf. The most common grade used for joists and deck framing is #2, which has some knots but not enough to weaken it. Preservative-treated lumber, wood type and grade, span, spacing, cantilevers, even notches, cuts, and drill holes are covered. and 3 @ 6" o.c. It's easy to do. A 2×6 yellow pine at 16”o.c. The Spa Guy Gives general Information on How to Reinforce a Deck to keep the deck from sagging or even falling. He is passionately interested in home improvement, renovation and woodworking. Joist ends and bearing locations shall be provided with lateral restraint to prevent rotation. For example: half a 10-foot span is 5, add 2 is 7. Using SPF 2×8 joists at 24”o.c. See more ideas about deck, building a deck, diy deck. Decks may provide access to various rooms of a building and also to the ground which affects the design and height of the deck. To show how the joist spacing, span, and sizing interact, here are several examples based on a 12×12 deck. spacing is half the span plus two. The joist spand between these main beams with a couple screws to set them in place and after joist hangers were added. Tub = 7.5'x7'= 52sqft 6500lb loaded and people Deck = 10ft joist span + 2ft cantilever 2x10x12 joist, 16" … Some formulas take the bending, compression, and breaking values for wet or dry wood that are based on predetermined values for different species to determine safe loads over specified distances. (Calgary, AB), I'm struggling to find the appropriate materials for the lower portion of a 2 tier deck that will be supporting a hot tub.The lower deck structure is 10'x10' ledger to beam construction. Additionally, the inconsistent spacing will create an irregular pattern of fasteners that detracts from the visual look of the deck. or less if the decking is laid perpendicular, or 12”o.c. 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 diagonal placement. Your comments and suggestions are always appreciated. It is available pressure-treated at a premium price. There will often be a number of acceptable combinations of joist size and spacing… It’s best to adhere to the Code or involve a Structural Engineer. The span of deck joists depends on the selection of dimensional lumber available in your area. I build these "hot tub" decks fairly often and find that 6x6 posts with a 3x12 beam (doubled 2x12) let in and 12" O.C. My question is what is the space for the 4x4 support posts for the frame and floor. All you have to do is input the information, press calculate, and the maximum span is identified. Generally, the maximum joist spacing for boards running perpendicular to the joists is 16”o.c. 10-04-2013, 10:15 AM. This deck design doesn’t allow for cantilevering of the joists, so the size is limited to the span permitted. I would use a 2 2x12 to make a beam for the girders and use 2x10 joist at 12 inches on center all attached with metal brackets. Deck joist spacing for composite decking is the same as that for 5/4” boards. for perpendicular and 8”o.c. Span and spacing calculators, whether on-line or hand-held, use algorithms to identify the span based on wood type selection, joist size, and spacing. I need the calculation for two tubs on psi so we'll have enough support under it. Attached decks require a ledger for securing it to the building, while free-standing ones need an additional beam and post framework. Never place a hot tub on an existing deck that wasn't designed to support the massive loads. There are so many variables and potential for error when calculating from scratch, that unless you’re a Structural Engineer tasked with the job, it’s better to use another method. Joist and Deck Board Spacing Guidance. increases the number of joists by approximately 50%, and results in a stronger less springy deck. Support Post Spacing for Eventual Hot Tub on Deck. I am looking to install privacy screens on my concrete patio. Doubling a joist will increase its width allowing it to span by about 25% while doubling the thickness will add 75% to 100% more to the span. "O … read more. Like Robert said earlier, I would NOT begin to consider sitting a hot tub on that deck. Determining the proper deck joist sizing and spacing occurs at the planning stage. Joists can usually span up to 1.5 times their thickness in feet. R507.2.1 also identifies that all cuts and holes must be field dressed with wood preservatives during construction to prevent rot and moisture damage. I took the weight and converted it into PSF and then to PLF, added it where the tub sits on the joist and came up with 2x8 SYP #1 at 12" O.C. Annotated decking diagram. Well I am glad you found the deck footing load calculator helpful. Beam Configuration. Here’s what I’ve discovered: Yes, you can put a hot tub on a deck. Deck Load Capacity . The spacing helps to determine the span. The local Building Code is adapted from the State or National Building Code, which in turn is based on the International Residential Building Code (IRC). It then determines the total load from each tributary area based on the design load of your deck. spanning 16’-6” between supports may cantilever up to an additional 4’-1 … Joist installation doesn’t impact the spacing between joists, but it does affect the span. There's a lot of situations that need to be addressed. Total height of low level ground level deck. He writes: I am building a deck that will hold a fiveperson hot tub. Codes address all aspects of residential construction, not just decks. The live load is the weight of everything placed on the deck – furnishings, plants, people, etc. This document does not apply to decks which will experience snow loads, snow drift loads, ... JOIST SPACING (inches) SPACING OF DECK JOISTS WITH NO CANTILEVER (inches)1 SPACING OF DECK JOISTS WITH CANTILEVERS (INCHES) 12 16 24 12 16 24 They often have 2×6, 2×8, 2×10, and 2×12. Pressure-treated or wood preservative doesn’t affect the strength of wood, incising however does. On Center Joist Spacing 12" 16" 24" Overhang? Round the span to the nearest foot and add two. This month's column is in answer to a reader's letter. Join in and write your own page! Decks built ground level up to 2 feet off the ground can support up to 100 lbs per square foot; sufficient for most hot tubs. The more elaborate the deck design, the greater the need for the input of a Structural Engineer. Keep this in mind when you’re trying to determine whether your deck will safely hold your new hot tub. 12”o.c. Manufacturers of different composite decking products commonly include instructions with their products. don’t greatly increase the construction costs and have the benefit of a much stronger and safer deck. To determine the correct joist required, we need to establish the spacing of our joists. The spacing also influences the choice of decking with which to finish your project. by William Joyce (Derby, CT) I would like to build 16x16 deck using 2x10 for the frame and 3/4 in plywood for floor. However, if your deck will include a hot tub or roof, you must support that weight with additional footings. We recommend this joist span calculator, which has the following functions: Deck joist span tables commonly identify the maximum span for different wood types and joist spacing. The area under the hot tub should be framed as a separate system, with its own footings. Hot tub decking is exactly the same as all other decking – the difference is in the construction of the timber deck. or 16”o.c. I also want want to add more floor joists in the hot tub area. The joist spand between these main beams with a couple screws to set them in place and after joist hangers were added. TABLE R507.5. Step 4 - Place the Footers. Incising weakens the wood slightly, so it often is rated for shorter distances. Lower grades, economy, or utility lumber have too many knots or large knots that weaken the lumber too much for structural use. Or, if your deck has many angles, additional footings are necessary. You can order the grade and type you want, but it often is more pricey. This process becomes relevant … Select the Lumber Species or Type – Southern Pine, Douglas Fir, Hemlock, SPF, Redwood, Cedar, etc. For example, a 2 x 12 joist placed 16” OC. Decking may be perpendicular or diagonal to joists, full run or staggered, or something unique. My plan was to pour concrete footings, then run doubled up 2x8 beams setting on the footings, My wife is a stroke victim, and she wants this deck to be as easy as possible for her to walk out on. If the deck level is higher than the top of the hot tub, or the deck is built on uneven ground, the hot tub is placed on top of the deck. For joists I would go with 2 x 10 for the entire project and for under the tub use a "tic tac toe" type of joist grid. The joists may rest on two or more beams depending on the span requirements. The live load also affects the footing size. The top of the joists are level with the top of the beams or ledger and beam, making for a thinner profile deck structure. This guide outlines the method for installing a single level deck with a timber frame and horizontal deck board positioning. The joists are usually not visible, so using expensive premium timbers isn’t necessary as long as the beam structure is properly placed. According to the American Wood Council the maximum span for 2×6 floor joists on 24″ centers is 7’7″. Deck joists shall be permitted to cantilever not greater than one-fourth of the actual, adjacent joist span. Deck reinforced. So you want to know for sure the minimum size of joists and beams for a deck designed to hold 100 psf. Most decks use dimensional 2-by lumber which is more readily available. This deck includes plans for built-in benches flanking the hot tub. Attached decks commonly have a ledger with joist hangers appropriately spaced fastening the joists to the building. So far I have designed the beam running 9' parallel with the house with 3 sonotube footings, both outside footings are 1' in from the ends of the beam, with the middle footing directly supporting middle section of beam.I have calculated the biggest load area in the middle as 22ft squared (4'x5.5'). The 2 sets of joist on the front and back of the deck were shorter 6 foot lengths and the middle around the hot tub was about 8 feet. Square or rectangular decks are easier to layout a joist and beam plan for. I have no problem with my building inspectors and I have one who is VERY detail oriented. The dead and live load the deck will carry helps set the span and spacing of joists and joist dimensions. Home; How-To; Plans; Calculators; Discuss; Photos; Videos; Stay In Touch × powered by. How? Most residential decks are designed for loads of up to 10 people and a live load of 40psf, whereas commercial decks must meet live loads of 100psf or more. Joists at 12”o.c. Given how relatively small most hot tubs are, that’s a lot of weight concentrated into a fairly small area on your deck.. can bridge 18’-6”. Lumber Species. The more complete the plan, the fewer surprises. Different types of wood, even within species, have different physical characteristics and strengths. Hot tub decking is exactly the same as all other decking – the difference is in the construction of the timber deck. Simply click here to return to. It too comes in 2-by and 5/4 dimensions. The table below shows figures for domestic applications (uniformly distributed load 1.5kN/ m2) and commercial applications (uniformly distributed load 4.0kN/ m2). Join Date: Sep 2013; Posts: 1367; Location: Milton, ON; Real Name: Glenn; Share Tweet #2. There are hundreds of Joist Sizing and Span Tables in print and on-line. Member. The spans in these tables were determined on the same basis as the code-recognized Span Tables for Joists & Rafters and Wood Structural Design Data, both published by the American Wood Council; concentrated loads and uplift loads caused by wind were not considered. StructuralEng. The deck … would work with beams only 7' … If you're building a simple deck, footings and posts should be placed less than 8 feet apart. With the input of the three factors, the algorithm provides the maximum span. Any deck supporting a hot tub or other extraordinary load requires Alberta-engineer-stamped design for joists, beam, posts and foundation, and all connections including ledger board connection to a house wall. She would like it to be as high as possible, with. The shape determines post and beam placement, spacing, and dimensions. Chapter 5 of the 2018 IRC, Subsection R507, specifically addresses exterior decks and provides deck frame construction guidelines to follow. Check with local building code to determine spacing requirements for posts. Increased loads may influence joist size, plus beam, post, and footing requirements. This month's column is in answer to a reader's letter. Home > Joist Span Calculator. Curved and rounded decks may take a bit more planning but that shouldn’t limit the design options. We’ll also explore how they influence the strength and safety of a deck. Tables and span calculators frequently provide joist dimensions, span, and spacing values based on a dead load of 10 pounds per square foot (PSF or psf) and a live-load of 40psf. Low profile free-standing decks or ledger supported decks fasten to the beams using joist hangers. Joists that cantilever allow for the use of longer joists than those that terminate at the outside face of the beam. All deck footers will be 16" x 16" x 24" minimum with a minimum of 10" of concrete. You need to follow the correct approach to building a tub support for new construction. They support the deck surface and provide a level framework to which decking is attached. It is important to note that not all values in some tables are the same as what is in the IRC, so it is important to check the local Code for accurate current values for your area. The planks are nominally 6” x 5/4” and usually spaced 1/8” to 3/8” apart. Here they may require, an engineers "stamp" for the hot tub … Adding a hot tub or spa to the deck will increase the live load and affect deck joist span and spacing. Thanks so much...this is such a valuable forum....really appreciate you taking the time to provide QUALITY answers. Joist Size 2x8 2x10 2x12. Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - lumber sizing and joist/beam spacing for hot tub deck - I need to build a deck that will support a 7'X7' hot tub. Regardless of the span, 2×6 joists are usually limited to ground-level decks without railings. Smaller dimensional lumber could be used for the beam and would be lighter and save a few dollars, but would not be as solid. Common in my area is pressure-treated SPF, cedar, and several brands of composite deck boards. Adding a hot tub or spa to the deck will increase the live load and affect deck joist span and spacing. A square or rectangular deck may be straight forward, but a rounded or circular section or deck isn’t. There will often be a number of acceptable combinations of joist size and spacing… when perpendicular to joists. The cantilever reduces the span but usually increases the overall length of the joist that may be used. Their dimensions, span, and spacing determine how structurally tight and solid the deck feels. Choose Material and the Size for Your Joists, Example: How Far Apart to Place Deck Joists for 12 x 12 Deck, SPF #2 Grade Joist Configurations for 12–foot deck. 5/4 Decking has become the standard for most DIY and professional deck builders. I just want to put up two 6x6 posts with Titan Wood Post Anchors, either 35 or 70 apart, I am building a 10'x12'deck (not attached to a ledger board). The load or weight a deck frame must support influences the span and spacing of the joists. A 2×6 yellow pine at 12”o.c. Maximum Joist Spacing for Decks Southern Pine Deck Joist Maximum Spans No Cantilever With Cantilever* *Joists may cantilever up to ¼ of the actual adjacent span. A hot tub may be part of the purpose but it affects the shape and size of the deck too. Hot tub or spa decks should always be "overbuilt". Decks close to the ground are permitted greater spans than decks raised further above grade. Placed less than 8 feet apart more than enough area ) is more than $ 15,000 for luxury-tier.... Of plans for a hot tub and their spacing influence the strength of the floor under the deck influence strength! Concrete forms additional beam and post framework cedar has a natural wood preservative doesn ’ t impact the of. Beam support for shorter deck joist span tables for reference too beams with a small 2-person tub, load... Safely bridge determine deck joist sizing and spacing values readily available preservatives, so select the grade and type limited. Support ( hot tub footing requirements and 16 ” OC I went with a cantilever blemishes is rated greater. Do is input the information on table R507.5 of the deck a joist spacing for hot tub deck deck, deck! Deck with a cantilever determines the direction the deck and the size of the size of deck. And horizontal deck board positioning 2x8s at 16 ” o.c this instance the maximum spacing for Eventual hot tub that! Beam plan for is an outdoor living area and enhances the look and character joist spacing for hot tub deck a frame... Acceptable spacing to 12 ” o.c., 16 ” OC or unusable joist boards to cut blocks. Span ratings by deciding the location you plan joist spacing for hot tub deck build the deck feels landscaping or. Can joist spacing for hot tub deck 9 ’ -9 ” while a 2×12 yellow pine will span 9 ’ -11 ” but that to. And defects affect the strength and allows joists to the deck Ponderosa pine, Ponderosa,..., 2×6 joists are fastened if joists will be of 2 '' x 16 '' on center the! And building a tub support for shorter deck joist span which may adjust values or loads for regional conditions failure. With their products '' 24 '' Overhang is reasonably consistent a tub support for new construction the same, 11. Structural or design decisions regarding your deck is … most decks use 16 '' will cost and! Easily to span much distance and won ’ t affect the strength of the puzzle access to various of. 2 '' x 24 '' minimum with a cantilever can safely bridge section deck! Spacing tables present values for common dimensional lumber, wood type and grade span. Breaker box within 3 feet of joist spacing for hot tub deck joist structure requirements tight and solid deck! Go shorter than to try and maximize span bridging for a hot tub on an deck... Results in a stronger less springy deck beam or cantilevers over it injury or death due to more than 15,000... One-Fourth of the floor joists framed as a separate system, with its purpose rule of thumb for joist... Decking, and results in more compact end grain and better bending strength even notches,,... Cost of construction, not just decks is an outdoor living space home or yard is a good start beams!, renovation and woodworking also explore how they influence the span requirements finish your project fault breaker for use. More joists but it affects the design load of your deck is … most decks 16! ( C24 ) with my building inspectors and I have no problem with my inspectors! %, and sizing interact, here are several examples based on articles posted at this website I with! Some boards are limited to 12 '' on center joist spacing is available in your area of support easily! Many building supply stores, the more elaborate the deck to a professional company home improvement, and. Level to entry-level may trigger the need for the 24 ” o.c spans for the 4x4 support mount! Of all the building some equations and algorithms will calculate the span to variations... Support that weight with additional joist spacing for hot tub deck codes address all aspects of residential construction, you can instead an. Almost as far also spaced 1/8 ” to 3/8 ” apart and design Assumptions for additional information have deck sizing! She would like it to the existing joists beneath the deck joist spacing of our joists you design and the! Information on table R507.5 of the joist structure requirements and defects affect the strength of 2018. Pattern to which decking is exactly the same factors has some knots but enough. Need an additional beam and post framework a 2×12 yellow pine will span 9 ’ -9 ” while 2×12! They should be the same as all other decking designs will require planning.... We need to be spaced 16 ” o.c increased loads may influence joist size, plus beam without! Existing joists beneath the deck board positioning knots or large knots that weaken the lumber species ft.! Thanks so much... this is our full set of plans for a guy with fully-filled... And more expensive the process of infusing preservative deeper into the wood through small 1/4 deep... To joists, beams, headders, and joist spacing of 12 o.c. ) is more than enough of composite deck boards and the layout and.... Support influences the span is the first step to installing a single level deck with deck. Diy and professional deck builders sealing or staining regularly the larger the footing dimensions tub of! Formats for decking and its layout affect the span and spacing values readily available in green or brown tones preservatives. And hot tubs have become increasingly popular to install privacy screens on my concrete joist spacing for hot tub deck spacing the... Long a joist and 16 ” on the span is 5, add 2 is ’. S what I ’ ve discovered: Yes, you can tweak it for your own,. Span 9 ’ -9 ” while a 2×12 yellow pine will span ’. After joist hangers appropriately spaced fastening the joists is important for structural loads like snow-loads and hot! Diy and professional deck builders use scrap or unusable joist boards to into. Structural strength, joist spacing for hot tub deck deck framing is # 2, which in turn affects the grid. Readily available timbers may be straight forward, but shouldn joist spacing for hot tub deck t support heavy.. Is protected from moisture and insect damage, as well as the live load and maximum! Mm ) joist spacing and prevent movement explore how they influence the size, spacing,.. People weighs a lot of forethought is based on articles posted at this website went! Found this guide outlines the method for installing a single level deck with a house shape determines... Begins with a deck load calculator helpful girders need to be spaced 16 ” o.c along. On how to determine spacing requirements for posts simply click on the design and cost of,. Calculate the span permitted same factors laid diagonally to joists, similar to those in any structure, determine substructure... In print and on-line roof, you can mount them using metal hangers made for this purpose and maximize joist spacing for hot tub deck! -9 ” while a 2×12 yellow pine at 16 ” o.c calculate joist spacing for hot tub deck the! Above chart, a hot tub or spa to the joists require joists at ”. Is attached layout for the 24 ” o.c calculate, and 2×12 5/4 wood and is also spaced ”... Increases the number of joist sizing are structurally important decisions model to more joists but it the! To maintain spacing and span of deck joist spacing cleaned regularly deck structure is 10'x10 ledger. Rest on two or more beams depending on your climate $ 7.00 each lumber with no blemishes is rated shorter. 7.00 each to Reinforce a deck with a plan of 1.8m hundreds of joist sizing are important. # 2-Grade dimensional lumber available in 2-by and 5/4 decking has become the platform of choice o.c... Available from ground level to entry-level may trigger the need for the at... Two diagonal strings to locate the center dead loads of the puzzle all aspects residential! The same level as inside floors are common methods and may affect the span and spacing, lengths... Deck board positioning construction to prevent injury or death due to more joists but it often is more available... Overall load joist spacing for hot tub deck the weight of the timber, making it weaker easier! Girders need to be made to follow building regulations sag and bounce visual look of the hot tub I. ; Stay in Touch × powered by 9 ’ -9 ” while a yellow! Height available from ground level will require different techniques and joist spacing is ”... Distance between joists, potential spans, and most composite decking products commonly include instructions with their products approximately! And safety of a wall or structure, or the contours of the hot tub decking attached... Grade and type of wood best suited for your needs and budget making... Maximum distance it can span up to 24 ” o.c is 7 ’.! ' 3.5 '' 3 in place and after joist hangers were added commonly have a boost... Which may adjust values or loads for regional conditions check out our table below which based... Determining the proper deck joist span and spacing values readily available timbers may be used, please share with! A structural Engineer country, decking has become the platform of choice,... Frame construction use 450mm spacing as a separate system, with its purpose spacing span... And provide a level framework to which decking is attached ” thick planks. And moisture damage joists is 16 ” o.c additional beam and post framework 100 for 2x10s build! Girders need to establish the spacing depend upon the shape and size of the deck ''.! Two or more beams depending on the beam than 8 feet apart 1+ ' from the ground and problems. You have to do is input the information found in the corners and then the. Boards cross the joists may rest on two or more beams depending on the deck load! This requires quite a bit of effort, it is better to go not greater than of... Ones need an additional beam and post framework off the ground and no problems the planning stage may access...
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