Standard Decking Board Size5/4 decking boards are the most popular size of decking and are cheaper than 2×6 boards. label }} 2 Joist Size {{ option. Deck Average Size. In modern lumber practices, the boards are no longer exactly 2 x 4 inches when first cut, but today's drying and planing methods still leave the board 1 1/2 inches thick and 3 1/2 inches wide. Dimensional Lumber Decking Planks TIPS: Are you a professional builder?. The most common or standard deck board width is 6-inch wide planks based on square-foot. Compare $ 5 98 (214) Model# 291224 5/4 in. They span a larger distance than 5/4 boards. The minimum joist size is a 2-by-6, which may span up to 11 feet 7 inches without additional support if they are spaced just 12 inches apart. The old standard of calling this board a 2 x 4 still remains, even though in today's lumber practices, the board has never been 2 x 4 inches in size. Wood is more budget-friendly and has an authentic look and feel, but requires more maintenance such as painting, staining and sealing for protection. A small deck intended to hold a round dining table should be at least 12 feet by 12 feet, while a large deck can be designed with much more space. If you’re installing deck boards at a 45-degree angle to your joists, you’ll need to. What is the Standard Roof Sheathing Thickness? Standard roof sheathing thickness is ½” to ⅝” thick. The bigger your deck is, the larger joists you need. A deck's width and length should be proportional to the house. Deck Sizes (Dimensions Guide). A deck’s width and length should be proportional to the house. Channel and handrail material range from 66×30 to 88×42. Jun 3, 2022. Looking for more options? Go with TimberTech AZEK deck boards. 2 x 6 boards available in 12', 16', and 20' lengths. Enjoy the WeatherShield 1-1/4 in. It also addresses the boards’ shrinkage and expansion caused by less or more humidity. The nominal measurements are a board's size before it has been planed smooth (surfaced) on all four sides. A huge deck might make your home appear smaller, while a little deck can be unnoticeable. The deck board thickness of all TimberTech Multi-Width Decking is 1”, making these boards ideal for builds with standard 16” joist spacing (but unsuitable for commercial applications with 24” spacing). Your deck measures 16 feet long x 12 feet wide. One note: that 16-inch spacing is based on a traditional deck board pattern, with boards installed perpendicular to joists. Deck board size refers to the length, width, and thickness of the boards, all of which vary depending on the type of material chosen. If your joists are spaced at 24 in. 5/4 x 4 and 5/4 x 6 is produced specifically for. Most manufacturers offer composite decking boards in 12’, 16’ and 20’ lengths. Do Decking Differently ®. Standard-width decking is not the standard anymore. 5/4 Decking (Here Are The Differences). You have two main choices when it comes to building materials for your deck: wood or composite decking boards. Then measure when you’re 4 to 5 ft. Other common deck board widths are 4” and you may find some 8-inch-wide deck. Other common deck board widths are 4” and you may find some 8-inch-wide deck. 5" Standard Lengths: 12' 16' 20' Custom Lengths: Not Available Woodgrain: Both Sides Colors Available: All colors at 12' and 16'. a nominal 8x8 timber has a minimum finished size of 7. 5/4 x 4 and 5/4 x 6 is produced specifically for decking and can be found milled with a radius or bullnose edge. Deck boards are typically 12 or 16 feet long, about an inch thick, and roughly 5-½ inches wide - though wider or narrower boards are a growing trend in deck design. Commonly used joist sizes are 2-by-6, 2-by-8 and 2-by-10. 2 1/2 inch and 3-inch deck screws are ideal for railings, deck board, joists to ledger board, etc. Looking for more options? Go with TimberTech AZEK deck boards. Wood and Treated Lumber Buying Guide. Lag screws must go through band board at least 1/2 ". Compare $ 6 98 (139) Model# 2311255. The standard width for composite deck boards is 5. a nominal 8x8 timber has a minimum finished size of 7. I use the following minimum dimensions (as measured away from the house) as general rules of thumb when planning decks: 8 ft. Times may vary based on the complexity of the shape and features of the deck. Most composite decking types require twelve-inch on-center joist spacing for 45-degree or slanted composite deck board installations. You have two main choices when it comes to building materials for your deck: wood or composite decking boards. com">Deck Board Decking at Lowes. Only available in Transcend Tropicals. A tiny deck for a round dining table should be 144 square feet. Deck Board Decking at Lowes. Decking Calculator">Decking Calculator. Decking (Here Are The Differences). com">Deck Board & Materials Calculator. For high-traffic patios, however, 2×6 decking boards are a more solid and safe surface. If you're installing deck boards at a 45-degree angle to your joists, you'll need to tighten up your joist spacing to 12-inches on center. 51 square feet per board. New looks are forming around multi-width. This lumber is pressure treated with micronized copper azole in order to protect it from termites, fungal decay, and rot. Below you can see the most common decking and siding sizes we offer: Nominal Size Actual Size (Imperial) Actual Size (Metric) 1x4 : 0. Ledger board width must be => deck joist width but = com">How to Build Deck Stairs & Steps. When it comes to decking board size there really are no rules, but here are a few basic questions you need to ask yourself. 5 inches, but there are a few different profiles available. 25″ deck board width, width available in square shoulder only. 4 in x 16 ft (33 mm x 86mm x 487 cm) 2 x 6: 1. A deck’s width. If you have a specific width in mind, be sure to check the profile before purchasing your boards. pressure-treated decking board 5350253, for above ground use is pressure-treated to help. Multi-level designs can be built depending on the deck location and available space. In most cases, it requires a joist spacing of 16 in. Multiply the number of boards you need by 1. 5" Standard Lengths: 16' 20' Custom Lengths: Not available Woodgrain: Both Sides Colors Available: All. On a deck, fascia refers to the boards used to cover the end cuts and/or rim joists, installed bordering the deck surface (below, left). Lag screws must go through band board at least 1/2 ". Installation Tips, Safe Practices, Care and Maintenance Installation Tips. Deck Board Size & Profile Options. Standard Ground Contact Pressure-Treated Pine Decking Board Compare Best Seller ( 267) Model# 2331255 WeatherShield 2 in. A tiny deck for a round dining table should be 144 square feet. The width of the board is 6 inches. Deck boards are typically 12 or 16 feet long, about an inch thick, and roughly 5-½ inches wide - though wider or narrower boards are a growing trend in deck design. Deck board size refers to the length, width, and thickness of the boards, all of which vary depending on the type of material chosen. Craft Your Vision With TimberTech Multi-Width Decking Narrow 3. 2 x 6 boards available in 12', 16', and 20' lengths. Wood is more budget-friendly and has an authentic look and feel, but. Like getting a Big Mac without the middle bun, still decking just less. The main difference between 5/4 and 2×6 decking boards is the actual dimensions of the boards. Deck Board Size Wood decking is commonly available in 2x6, 2x4, 5/4 x 6, and 5/4 x 4 profiles. While NIST Publication PS20 indicates that nominal 7" to 15" thick timbers should have 3/4" removed for a finished dimension (e. Generally, a deck should be wider than it is deep, with the longer dimension running along the house. Deck boards come in a variety of sizes, however, the most common size is the standard 6-inch width deck board. Locate upper and lower bolts maximum 5. The width varies by brand and style and can range from one to two inches thick and four to six inches wide. Whereas, a 2”x6” decking board is rated for both and can also span upwards of 24” OC. The size mainly depends on the amount of space you have. The most common deck board size is 16ft with a 1 inch thickness and weighing about 1. Deck boards are typically 12 or 16 feet long, about an inch thick, and roughly 5-½ inches wide - though wider or narrower boards are a growing trend in deck design. A deck measuring at least 12 feet by 12 feet should be enough for you to hold a round dining table. Why Choose Multi-Width Decking? Add Visual Interest to Your Deck Design. While NIST Publication PS20 indicates that nominal 7" to 15" thick timbers should have 3/4" removed for a finished dimension (e. away from the house and adjust the gap sizes to be sure the last board is a consistent width. Treated for protection from termites and rot, it is. If you are going to build your decking next to a house then make sure it’s 150mm below the damp-proof course and that you don’t cover any air bricks. This type of deck board is commonly referred to as 5/4 decking. ” Both being smaller than their names claim. 5 "apart vertically for 2x8 / 10/12 respectively. The normal spacing for deck joists is 16 inches on center. Dimensions: Nominal vs Actual. Learn More About Deck Boards This calculator will tell you: number of boards (by length) required Required number of boards (including waste factor) number of screws and hidden fasteners needed number of boards (by length) required Required number of boards (including waste factor) number of screws and hidden fasteners needed 1 Total Square Feet. For example, for the dimensions of lumber, a tag that says 2 x 4 doesn't actually mean lumber that's two inches by four inches in measure. This sturdy pressure-treated timber #2 southern yellow pine meets the highest grading standards for strength and appearance. 72″ 19mm x 120mm : Linear Footage for x6 Standard or Pregrooved Boards Linear Footage for x4 Standard or Pregrooved Boards Linear Footage for x6 T&G Boards. You can also find narrower and wider boards, but these are not as common. Deck board Pressure Treated Lumber at Lowes. Some deck boards are thicker or wider and some have rounded edges. Decking Railing ADA Handrail Lighting 1" Square Edge Board TRANSCEND Transcend Lineage Actual:. Both materials have their merits. Some deck boards are thicker or wider and some have rounded edges. Rather 2 x 4 is in actuality 1-1/2-inch x 3-1/2-inch. Deck Board & Materials Calculator. Some of the most popular include: 2-in x 4-in 2-in x 6-in 4-in x 4-in 6-in x 6-in Tip Lumber is available in a variety of sizes and products. While you might think of this as 1-1/4 inch, the standard reference is 5/4 inch. Deck joist spans depend primarily on how much weight the deck will bear. or you’re running your deck boards at a diagonal, you may need to use 2-by (1-1/2 in. Ground Contact Pressure-Treated Premium Pine Decking Board. If you’re installing deck boards at a 45-degree angle to your joists, you’ll need to tighten up your joist spacing to 12-inches on center. The average deck size is between 300 and 400 square feet. Additional sizes may be available or on special order. To figure waste, multiply the number of boards you need by 1. Estimate includes standard decking installation (no unique deck board layout like a picture frame, herringbone pattern, etc. Choosing the Right Decking Board Thickness. The actual measurements are the final size of your piece of lumber. Deck Board Size Wood decking is commonly available in 2x6, 2x4, 5/4 x 6, and 5/4 x 4 profiles. How to Choose the Best Deck Size. Fascia Trim for Your Home or Deck: What to Know. These measurements are what the deck boards are cut to before they are planed on all sides to give them a smoother and more. This type of deck board is commonly referred to as 5/4 decking. If you’re laying your deck boards on a 45-degree angle or in a herringbone pattern, add a 20-25% waste factor. The widths are readily available in most lumber or building supply stores, and the number of pieces easily calculated into deck dimensions. Decking Railing ADA Handrail Lighting 1" Square Edge Board TRANSCEND Transcend Lineage Actual:. And in several building codes, the standard deck board thickness it uses is 5/4 x 6. Also, the diameter of your lag bolt shouldn’t exceed #8 or it may split. A plank that is 5/4”x6” is rated for 12” OC and 16” OC. If your project calls for precise measurements, be sure to check your lumber size before purchasing. A Guide to Proper Spacing Between Pressure …. #2 Prime Pressure-Treated Ground Contact Southern Pine Lumber Compare ( 214) Model# 291224 WeatherShield 2 in. TimberTech AZEK Decking Features. I'm gonna bring in this mock up of our deck boards and our fascia and now you can see from the top of the 11:38 deck board top of the next board same height right that's going to be the same height as here top of the deck board to 11:45 that deck board right now the issue is when you come down here you can see we don't have a deck board 11:50. 1st deck RAILINGS WHAT YOU NEED TO KNOW 36 "minimum height when surface is 30" + above grade 200 lb concentrated load 50 lb concentrated load over 1 sqft or balusters 50 lbf vertical and horizontal load along top rail 4 "maximum gap between deck and underside of bottom rail 4 "maximum gap between balusters. There is a nominal thickness and then an actual thickness. You have two main choices when it comes to building materials for your deck: wood or composite decking boards. 5″)-width boards, to add a touch of the. , while 6-inch deck screws are required for 4×4 posts. If you install your decking using wet boards, pressure-treated decking that has not yet dried out, then you should install them. A tiny deck for a round dining table should be 144 square feet. A deck should be between 300 and 400 square feet in size. Deck board size refers to the length, width, and thickness of the boards, all of which vary depending on the type of material chosen. Actual Dimensions. The widths are readily available in most lumber or building supply stores, and the number of pieces easily calculated into deck dimensions. When choosing the right deck screws, the size and type of decking materials, as well as the project’s location, must all be considered. Deck joists come in dimensional lumber lengths from 8 to 16 feet. Dimensions for post timber (in millimetres) range from 88×88 to 120×120. Craft Your Vision With TimberTech Multi-Width Decking Narrow 3. Our square edge boards install traditionally like wood – with deck screws. How to build decking. 5″ deck board width, available in square shoulder and grooved. In modern lumber practices, the boards are no longer exactly 2 x 4 inches when first cut, but today's drying and planing methods still leave the board 1 1/2 inches thick and 3 1/2 inches wide. In most cases, it’s best to start with a full board on the outside edge of the deck and work toward the house so the odd board is less visible. Deck boards come in a variety of sizes, however, the most common size is the standard 6-inch width deck board. How long is my deck going to be? If your deck is going to be long, the temptation is. What Is the Standard Deck Board Size? Common deck board widths are 4", 6" and 8". Use the table below to understand the most common board thicknesses: Decking Thickness Definition Table. For plywood, which is slightly stronger than strand board, ½” thick is appropriate. Deck Joist Span & Spacing Calculator. In most cases, it’s best to start with a full board on the outside edge of the deck and work toward the house so the odd board is less visible. Deck Board Size Wood decking is commonly available in 2x6, 2x4, 5/4 x 6, and 5/4 x 4 profiles. A deck should be between 300 and 400 square feet in size. A deck should be between 300 and 400 square feet in size. The average deck size is between 300 ft² and 400 ft². To convert inches to feet, divide by 12. Estimate includes standard decking installation (no unique deck board layout like a picture frame, herringbone pattern, etc. Deck Average Size. The most popular thickness for decking boards in North America is a 5/4 thickness which is an actual 1" thick. A deck should be between 300 and 400 square feet in size. Shop Trex Transcend® Composite Decking. 5 in x 12 ft (24 mm x 140mm x 365 cm). Specification for Deck Boards. Proper deck board spacing should have a 1/8-inch gap after the decking has dried out. Roof Sheathing Thickness: Essential Guide. The normal spacing for deck joists is 16 inches on center. New looks are forming around multi-width deck boards: extra-wide boards and extra-narrow boards that you can combine for eye-catching deck board patterns. A Guide to Proper Spacing Between Pressure. How to Lay Decking Joists. 25"), most timbers over 7" are finished with 1/2" removed. When you're putting together a deck plan, the joist size depends on the space between the joists and the length of the joists. Learn More About Deck Boards This calculator will tell you: number of boards (by length) required Required number of boards (including waste factor) number of screws and. The timber deck substructure Posts - appropriate to scale and end use of structure Laying a fall in a deck to aid drainage Timber moisture content at installation: 20% maximum Deck board spacing: 5 - 8mm between adjacent boards Metal fixings must be suitable for long term, outdoor use Further specification references. What Size Joists Do You Use for Decking? Joist boards come in a variety of sizes, ranging from 2-by-4 to 2-by-12. Deck Building Code Requirements. Deck joists are generally 6, 8, 10, or 12 inches in width, with 8 or 10 inches as the most common sizes. Standard Deck Board 2x4" Actual Dimensions: 1. One note: that 16-inch spacing is based on a traditional deck board pattern, with boards installed perpendicular to joists. I use the following minimum dimensions (as measured away from the house) as general rules of thumb when planning decks: 8 ft. Every piece meets the highest grading standards for strength and appearance. Standard Ground Contact Pressure-Treated Pine Decking Board. Standard Deck Board 2x8" Actual Dimensions: 1. 5 in x 16 ft (24 mm x 140mm x 487 cm). Standard deck joists are between 12, 16, or 24 inches on-center. ) with a breaker board, notching around posts, and hidden fastener installation. Deck board thickness is determined by the distance it can span between joists and is established in most building codes. for ground-level connections, paths, and stairs. Composite Deck Board Dimensions. TimberTech AZEK Decking Features. Treated Pine Sizes For Decking. Your deck boards measure 12 feet long by 5. Deck board size refers to the length, width, and thickness of the boards, all of which vary depending on the type of material chosen. 2×6 Deck Boards actual Dimensions 1. Learn More About Joists This calculator will tell you: Maximum Joist Span Maximum Joist Span 1 Type of Wood TYPE OF WOOD: {{ option. com">Deck Board Spacing & Sizing. The nominal measurements are a board's size before it has been planed smooth (surfaced) on all four sides. Four inch wide material takes longer to install,. 5 in (24 mm x 140 mm) Available Lengths: 12 ft (365 cm) 16 ft. Nominal size is usually the size quoted in DIY project instructions. In general, your deck should be wider than it is deep, and its longer dimension should run the length of the house. Common treated lumber dimensions are available through most building supply retailers. If you use 5/4 decking, you are getting two-thirds of the board of a 2×6. Do Decking Differently ®. 5″) widths, in addition to standard (5. Actual lumber sizes are approximate dimensions after trimming. The normal spacing for deck joists is 16 inches on center. 5″) widths, in addition to standard (5. The actual measurements are the final size of your piece of lumber. Be aware that using wide solid-wood decking can cause significant ponding issues as the flat-grained wood can cup, creating a shallow depression within. 5 in x 20 ft (24 mm x 140mm x 609 cm) 2” Square Edge Board Our square edge boards install traditionally like wood – with deck screws. #8 Or #10 Screws For Decking. It may be that you decide to use different coloured decking boards to do this or you could choose to run the boards in a different direction at each end of your deck in order to bring in the length and emphasise the width. You need an expansion gap of 5-8mm between the boards. Add a 10% waste factor to a standard deck with straight boards. Wood decking, for example, is usually cut down to 5/4 x 4, 5/4 x 6, 2 x 6, and 2 x 4 sizes while a composite deck board typically comes in 20", 16", and 12" in lengths and varying widths. Deck joist spans depend primarily on how much weight the deck will bear. Timber for screens range from 42×19 to 140×19. A deck’s width and length should be proportional to the house. Width: Six-inch wide boards are ideal in most cases. com">Deck Joist Sizing & Spacing. 2x4 and 2x6 are thicker and stronger, but they also tend to be more expensive than a 5/4 board of the same width. How Wide Are Composite Deck Boards? (Profile & Size Guide). Decking Boards: Everything You Need to Know. What are standard. New looks are forming around multi-width deck boards: extra-wide boards and extra-narrow boards that you can combine for eye-catching deck board patterns. These measurements are what the deck boards are cut to before they are planed on all sides to give them a smoother and more uniform surface. Proper Deck Board Spacing: Last Guide You’ll Ever …. ” This is an industry-standard sizing. Avoid boards that are only 3/4 in. Multiply 16 x 12 for an area of 192 square feet. Deck boards come in a variety of sizes, however, the most common size is the standard 6-inch width deck board. 5 in (24 mm x 140 mm) Available Lengths: 12 ft (365 cm) 16 ft (487 cm) 20 ft (609 cm) TRANSCEND LINEAGE PROFILE REFERENCES 1 x 6 x 16' 1 x 6 x 20' TRANSCEND LINEAGE COLORS: Biscayne, Rainier, Carmel, Jasper Transcend Actual:. With large decks, consider making them multi-level. I use the following minimum dimensions (as measured away from the house) as general rules of thumb when planning decks: 8 ft. You can choose the size that works best with your overall deck design and dimensions. 5″)-width boards, to add a touch of the unexpected – and an element of style. In general, standard deck boards are approximately 1" thick, 6" wide, and 12', 16' or 20' long. Locate upper bolts at least 2 "below the top edge of ledger. The deck board thickness of all TimberTech Multi-Width Decking is 1”, making these boards ideal for builds with standard 16” joist spacing (but unsuitable for commercial applications with 24” spacing). Railing Posts Deck railing screws with a diameter of 1/2 inches are ideal. You can choose the size that works best with your overall deck design and dimensions. Learn More About Deck Boards This calculator will tell you: number of boards (by length) required Required number of boards (including waste factor) number of screws and hidden fasteners needed number of boards (by length) required Required number of boards (including waste factor) number of screws and hidden fasteners needed 1 Total Square Feet. CHOOSING THE RIGHT DECKING BOARD THICKNESS. Joist boards come in a variety of sizes, ranging from 2-by-4 to 2-by-12. Common Measurement (T x W) 5/4-in x 4-in (1) 5/4-in x 6-in (5) Common Length Measurement 8-ft (2) 10-ft (1) 12-ft (2) 14-ft (1) Contact Type Allowed Above-ground (3) Ground contact (2) For Use With Decking (6) Landscaping (2) Fencing (1) Edge Profile Radius edge (2) Square (2) Primary Recommended Use (1) Deck board Show Item Number. Why Choose Multi-Width Decking? Add Visual Interest to Your Deck Design. Deck Boards Working with deck boards should be calm and secure. What Size Joists Do You Use for Decking? Joist boards come in a variety of sizes, ranging from 2-by-4 to 2-by-12. Multi-level designs can be built depending on the deck location and available space. Note that the actual thickness of a 5/4-inch board is usually 1 inch. The common/nominal 5/4-inch measurement indicates the thickness of the board before trimming, drying and planing at a sawmill. Lumber Dimensions: Nominal vs Actual. Decking boards come in varying thicknesses that can be a bit confusing. Just like in home exterior’s applications, fascia “trims” (runs along the. They have a wimpy feel underfoot even with closer joist spacing. #2 Prime Pressure-Treated Ground. Width: Six-inch wide boards are ideal in most cases. So choose beautifully coated screws. The deck board thickness of all TimberTech Multi-Width Decking is 1", making these boards ideal for builds with standard 16" joist spacing (but unsuitable for commercial applications with 24" spacing). Decking boards come in varying thicknesses that can be a bit confusing. Some deck boards are thicker or wider and some have rounded edges. Nominal and actual length are the same. Other widths may be used for aesthetics and effect. The actual size of a 2-in by 4-in board is 1-½-in x 3-½-in. Print Instructions Download Deck Plan Jump To: Tools Materials. Deck Joist Sizing & Spacing. Four inch wide material takes longer to install, creates more gaps and requires a lot more fasteners—but you can use it. Other common deck board widths are 4" and you may find some 8-inch-wide deck. Deck Board Thickness 101: What to Know. Deck Board Spacing & Sizing. North American Standard 6-by Timber (Surfaced 4 Sides, S4S). On a good note, manufacturers produce decking boards in standard—or the ones customers commonly ask for—sizes. In general, standard deck boards are approximately 1” thick, 6” wide, and 12’, 16’ or 20’ long. #2 Prime Ground Contact Pressure-Treated Lumber Compare. If you are using OSB for your roof deck, then ⅝” is the recommended thickness. Common Treated Lumber Dimensions. ” 5/4 Decking Actual Dimensions 1″ x 5. I'm gonna bring in this mock up of our deck boards and our fascia and now you can see from the top of the 11:38 deck board top of the next board same height right that's going to be the same height as here top of the deck board to 11:45 that deck board right now the issue is when you come down here you can see we don't have a deck board 11:50. 5 Deck Boards and their Nominal Dimensions Composite Decking Composite decking is a modern type of lumber typically used in building patios and house decks. Deck Joist Sizes, Span & Spacing (Complete Guide). Nominal sizes are simplified ways to reference, not actual sizes. Dimensions for post timber (in millimetres) range from 88×88 to 120×120. Before you build a deck, verify this with your local building department and read the installation instructions for the decking material. The average deck size is between 300 ft² and 400 ft². After planing, the actual deck boards have dimensions that are closer to 1 inch by 5. for elevated connections with railings. And finally, treated pine timber for decking boards range from 70×22 to 90×22. Build a Deck: Design and Layout. Multi-level designs can be built depending on the deck location and available space. Lumber is available in many standard sizes. The more susceptible the deck board is to rot, and the more upkeep it needs, the cheaper it will be. Standard Deck Board Sizes with 2 Detailed Drawings. One note: that 16-inch spacing is based on a traditional deck board pattern, with boards installed perpendicular to joists. Deck joists are generally 6, 8, 10, or 12 inches in width, with 8 or 10 inches as the most common sizes. Deck Board Dimensions: How to Choose the Right Size. Trex Transcend® Composite Decking. Deck boards come in a variety of sizes, however, the most common size is the standard 6-inch width deck board. Screws for boards should be 2. Decking Railing ADA Handrail Lighting 1" Square Edge Board TRANSCEND Transcend Lineage Actual:. Length of boards, however, is different. The majority of composite deck board manufacturers recommend a deck joist spacing of sixteen inches in the center for conventional straight composite decking installation on-center. There are some trades off with this difference. Lags must be hot zinc coated or stainless. The width of the board is 6 inches. Deck board thickness is determined by the distance it can span between joists and is established in most building codes. Standard-width decking is not the standard anymore. The most common deck board size is 16ft with a 1 inch thickness and weighing about 1. The nominal measurements are a board's size before it has been planed smooth (surfaced) on all four sides. Deck Board Size Wood decking is commonly available in 2x6, 2x4, 5/4 x 6, and 5/4 x 4 profiles. You can also use wide boards to bring in the length of a long deck. 5″ deck board width, available in square shoulder only. Use the joist span and spacing calculator below to plug in your desired type of wood, the size of your joists, and the required spacing between each joist. Types of Deck Boards. 5/4 in.