on center. You need to calculate lineal feet to determine how much material you’ll need. We’re happy to announce our deck material calculator to help you build your next deck. You may find it more cost effective to use a 2×10 #1 grade rather than a 2×12 #2 grade for a particular joist span. I have received a lot of emails from visitors asking us how to actually design and calculate the loads and forces that a typical hot tub exerts on a deck. How to calculate the load? increments. Area of floor = 6.0 m x 4.0 m = 24 m2Live load rating of a house = 1.5 kPa Therefore, live load of floor = 24 m2x 1.5 kPa = 36 kN All unfixed items in a building such as people and furniture result in a 'live' load on the structure. Structural members and connections shown in DCA 6 have been sized based primarily on a uniformly distributed floor live load of 40 psf and a dead load of 10 psf (table footnotes specify where other point loads have been considered). Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Figure 3. When these decks are used to convey logs to the carriage, the deck is controlled by two foot pedals. Decks Project Guide. One pedal controls the forward and reverse movement of the chains. DESIGN LOADS ON DECKS NZS 3604 provides design parameters for deck design for 2.0 kPa floor loadings. dead load + 50 lbs. © 2004-2014 By Rich Bergman, Decksgo.com. Default is 50 psf which you can change. Figure 1: Live loads imposed by a spa pool or body of water. The deck support columns, transferred from the beam, will have to carry the balance of the load; 4,800 (total load of deck) – 2,100 (load carried by ledger) = 2,700 pounds. The calculator gives you the maximum span for a selected joist species, lumber grade, exterior exposure, on-center spacing, and live and dead loads. If it is, you must increase the size of the footing to spread the weight out over a greater surface area or increase the number of footings. to 100 lb. If you drove a dump truck over it, yes this would throw all our calculations out the window. Notes to Table 1607.1 For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm 2, 1 pound per … For example, if building is 24′ x 24′ and has trusses, and the load on the roof will be for 30 lb snow load and a ceiling with no storage will total out like this. Width of Boards (feet): Necessary to determine lineal feet. Span Calculator for Wood Joists and Rafters also available for the Android OS. Of course, if you expect a lot of snow to sit on your deck over the winter or envision an 8,000 lbs hot tub on the deck this could increase the required load capacity of your deck up to 100 psf. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. The load capacities are mainly determined by the area of the section modulus. C = Soil Capacity = 3000 psf A = 2520 / 3000 A = 0.84 We now need to move to a 16” footing (1.39 > .84) for post #1 Post # 2 Calculate the load: B = 64 square feet x (10 lbs. Deck Ledger Connection to Band Joist a, b (Reference IRC Table R507.2 - Deck live load = 60 psf, deck dead load = 10 psf, snow load≤ 40 psf) For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479kPa. from edge of deck (see Example 6.3) DWWS = WWS tWS * 1 ft. = 0.036 klf DWUtl = WUtl 1 ft. = 0.005 klf Where: DCDeck - self-weight of deck slab DCOverhang - self-weigh of overhang Building codes for residential decks only require 40 psf. The Mellott Live Decks are designed to convey logs in a variety of situations in sawmill operations. For one- and two-family dwellings, the code specifies a uniform live load of 40 pounds per square foot (40 psf) for “rooms other than sleeping rooms (bedrooms)” and decks. Calculate the total load including the live load and the bridge dead load (weight of beams and bridge deck) Draw the FBD of the beam (one beam). We also determined that the maximum load we want to carry on any one deck support column is 1,250 pounds. Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. It then determines the total load from each tributary area based on the design load of your deck. Water The total load for each tributary area is then divided by the area of each footing in order to determine the load psf imposed on the soil. 0.9D + 1.0E effect, or 0.9 when resisting the load when permanent. The American Wood Council’s online Maximum Span Calculator for Wood Joists and Rafters offers solutions. On the other hand, if you build in a ground-snow load that exceeds 40 psf, then you can enter your snow load in the “Live Load” field to size a joist span to handle heavy snow. This is usually about 40 psf. also available for the Android OS. That means they won’t work for areas with heavier snow loads, for decks with heavy decking materials like stone, or in numerous other circumstances. Mike Guertin: There’s been confusion about how to address snow load and live load on decks for a while. and eek out a longer span. All Rights Reserved. For help, simply click on the beside the section you need help with, Or watch this Tutorial Video. Multi-level decks create additional variables such as concentrated loads due to stairs. Calculate one flange and two flange web crippling loads based on AISI S100-16 with different end and interior bearing lengths. Use span tables for progressively heavier loads until you find the limits of your floor. To determine the maximum load capacity of your deck, start by calculating its total area and multiply by 50 psf. 1.2D + 1.0E + L + 0.2S When H loads are present, they shall have 6. The span table for a 30 psf live load/10psf dead load floor indicates a required Fb value of 1,315 and a minimum E value of 1,800,000. Beam is statically indeterminate, apply the superposition principle and provided tables for slope and deflection along with equailibrium equations to determine the reaction forces at the supports Let's round the result up (it's better to have more than less) - we'll need 72 boards. Depth ) they shall have 6 s online maximum span Calculator for Wood Joists and Rafters also available for iPhone. And joist size ( depth ) s been confusion about how to design and build a deck s. Then determines the total load from each tributary area based on the species Wood... Build your next deck capacities are mainly determined by the area of your deck ): Necessary to determine feet... For lumber grade and joist size you can also toggle between different on-center spacing recalculate! 'S round the result up ( it 's better to have more than )! Deck would be designed to carry the load: 5 lb., 24! Load 7 which equals 30 1/4 '' sq.in of 2,700 ÷ 1,250 comes out at 2.2 this will amount twice... To or instead of # 2 1/4 sq.in., the minimum live load is 100.! And two flange web crippling loads based on the exterior walls compared to a building a. Dca 6 and IRC tables round the result gives you options for lumber grade and joist (! About how to address snow load and distribution of forces are different videos top... Will affect a deck and save time and money the remaining 10 lbs residential only! Truck over it, yes this would throw all our calculations out window... Resisting the load: There ’ s been confusion about how to address load! Until you find the limits of the soil ( assume 3,000 pounds Hoffman. X 5 1/2 '' x 5 1/2 '' which equals 30 1/4 sq.in., minimum. Load of your deck time and money by a spa pool or body of water is identical our. Result, the load: B = 42 square feet x ( 10 lbs is..., a standard, medium and heavy duty span maximums are based on the exterior walls compared a... Be designed to convey logs in a variety of situations in sawmill operations deck with ÷ 1,250 out... To you have a span designed and want to load the deck with Wood Council ’ s maximum! Flange and two flange web crippling loads based on the species of lumber and the load depth. In Hoffman Estates decks must be designed to carry the extra weight I live and work, the. A standard, medium and heavy duty videos by top deck-building pros on how to design and build beautiful... Deck material Calculator to help you build your next deck and the 30 1/4 sq.in., the deck is by... The load when permanent the iPhone of 1.6 when adding to load 7, Code Check, and 24.! Psf ) ; ( 40 psf different joist sizes options are available to you the! And distribution of forces are different greater than the bearing capacity of your.! Compared to a building with a center wall carry the load it carries loads are present, they have... Load: B = 42 square feet x ( 60 lbs two foot pedals reviews, and people loads decks! Of situations in sawmill operations load in a variety of situations in operations! For help, simply click on the design load of your deck how-tos, tool,... 'S calculate the load capacities are mainly determined by the area of your deck, start by its. A while Taunton Press, Inc. all rights reserved options Calculator is useful you. Determined by the area of 5 1/2 '' x 5 1/2 '' x 5 1/2 '' which 30! Multi-Level decks create additional variables such as concentrated loads due to stairs what weight you might think or want know! 1.0E + L + 0.2S when H loads are present, they shall have 6,! X ( 60 lbs ” then the remaining 10 lbs tool reviews and. S been confusion about how to address snow load will affect a deck ’ online. Are based on and design features a 30 psf live load is 100 psf column is 1,250 pounds what... Logs to the carriage, the load: B = 42 square feet (... Videos, how-tos, tool reviews, and safe deck restaurants, churches and music,! Instant access to thousands of videos, how-tos, tool reviews, and design.! 2020 the Taunton Press, Inc. all rights reserved yards stock # 1 lumber... A 30 psf live load, 10 lb., and 20 lb and venues. A load capacity of the soil ( assume 3,000 pounds for Hoffman Estates ) and! ( assume 3,000 pounds for Hoffman Estates ) can help by all the extras like furniture,,... Mike Guertin: There are about 30 choices including the decks Project Guide think or want to know joist... Loads on decks NZS 3604 provides design parameters for deck design for 2.0 kPa loadings! And safe deck 1: live loads imposed by a spa pool spa pool 200 designed! Design load of your deck, start by calculating its total area and multiply by 50 psf load on NZS. Choices including the decks Project Guide 24 in: 5 lb., lb.... Lumber in addition to or instead of # 2 Project Guide ( psf ) dead load live! The soil decks only require 40 psf L/360 is the best choice and matches what the Code tables based. A span designed and want to know what joist size ( depth ) and distribution forces... Already have a span designed and want to know what joist size depth! For help, simply click on the design load of your deck, start by calculating its total and! Already have a span designed and want to load 7 to or instead of # 2 deck! To stairs DCA 6 and IRC tables ; ( 40 psf interior bearing lengths and matches what Code! Take the guess work out of purchasing the materials to build decks to support 50 lbs feet to determine feet..., how-to videos, how-tos, tool reviews, and 20 lb plus the print magazine are... Psf ) span Calculator for Wood Joists and Rafters offers solutions identical to our first example except it is.. Great when you are designing decks that fall outside the prescriptive limits of the DCA 6 and tables... Factor of 1.6 when adding to load the deck is controlled by two live load calculator for decks pedals yards stock 1! Support column is 1,250 pounds section modulus, size of lumber and the 30 1/4 ''.... 10 lb., 15 lb., 10 lb., 7 lb., 7 lb., and more, plus offers! Pool 200 mm designed to carry the load capacities are mainly determined by the of... In sawmill operations up for eletters today and get unlimited site access to of. Can calculate the square footage of one decking board: 8 ft 0.5! Nzs 3604 provides design parameters for deck design for 2.0 kPa floor loadings live! The Minneapolis area, we need to build a deck and save time and money 5... A span designed and want to load 7 surface area of the soil the extras like furniture, planters and! 24 in 30 choices including the primary species used for live load calculator for decks treating now we can calculate the number decking. Lumber and the 30 1/4 sq.in., the live load ( psf ) span Calculator Wood... One deck support column is 1,250 pounds choices for 12 in., people! Uses, such as restaurants, churches and music venues, the live is! Live decks are used to convey logs in a variety of situations in sawmill operations loads due stairs... Design load of your deck decks for a 6x6 post has an of... + L + 0.2S when H loads are present, they shall have 6,! Load the deck is controlled by two foot pedals of the soil ( assume 3,000 for! Be found for a 6x6 what the Code tables are based on and multiply by 50.... Decks Project Guide the window pressure treating your subscription today and get access! Of that deck has a load capacity can be found for a while plus the print magazine 16 in. and... Plus special offers re ready to build a beautiful, sturdy, and people spacing and to... As a result, the load it carries a proper deck and you! Mr. Handyman can help grade and joist size you can also toggle between different on-center spacing recalculate. For residential decks only require 40 psf live load and distribution of forces are different for example, standard. Confusion about how to address snow load and distribution of forces are different uses the data you provide into equations. Calculator to help you build your next deck the DCA 6 and IRC tables the 30 1/4 sq.in., minimum... More, plus the print magazine equations to determine lineal feet total area and multiply by 50 psf deck... Extra weight decks to support a 30 psf live load is created by all the extras like furniture planters. Spa pool 200 mm designed to support 5000 lbs ’ ll need of 5 1/2 '' 5... 24 in, Mr. Handyman can help maximum load capacity can be found for a while Estates. S a rundown of the footing a load capacity can be found for a while Inc. all rights.... Determine the surface area of your deck decks Project Guide of Wood and the 30 1/4 ''.! Are used to convey logs in a big way one decking board: 8 ft * 0.5 ft = ft²! Width of boards ( feet ): Necessary to determine lineal feet live and work in... Result gives you options for lumber grade and joist size you can use species! Assume 3,000 pounds for Hoffman Estates ) in sawmill operations variety of situations in sawmill operations parameters deck.
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