Deck design guide 1 cit y of portland, oregon burea u of devel opment services 1 900 sw 4th av enue, po r tland, oregon 97201 5038237300. Codecompliant guardrail posts professional deck builder. Once you have selected the size of your deck, use the joist and beam span tables to determine their size. Autocad details dwg and dxf formatted cad detail files available for free viewing and downloading. Changes to the deck code coming in 2018 professional deck. The deck is bearing on ground with a slope greater than 1 horizontal for every 1 vertical the deck is selfsupporting not attached to an exterior wall typical deck general information. Deck beams that are not notched into posts must be secured by other means capable of resisting lateral displacement. May, 2020 youll need the post layout marked before you begin. Installation guide in your hands, youre holding everything you need to begin building with. Figure 16, sheet 11 openings shall not allow the passage of a 4 diameter sphere 6x6 post footing. Deck details based on the 2012 international residential. The deck can have up to a twofoot maximum joist andor beam overhangsee figures 1, 2. Deck footings shall meet the requirements of section r403, figure r507.
The post height, measured from the top of the footing to the underside of the beam, must be in accordance with table 2. With post cap beam secured with bolts to notched post methods of attaching beam to column ok beam splices joisttobeam connection each joist shall be attached to the beam as shown. This guide recommends connectors and fasteners for deck. Georgia amendments prescriptive deck details based on the 2012 international residential code this design document applies to singlespan, singlelevel residential decks only. Post size and spacing post to beam connection joist size and spacing height of deck above grade deck elevation 6x6 posts are recommended anything over 40 6x6 are required footing size, depth and method footing minimum size is 12 diameter beam, joist size and spansspacing. Deck beam deck floor joist header deck guard eck beambetween columns see deck beam chart wood columns shall be anchored to resist up lift reference nbc sentence 9.
A beam is allowed to continue over the top of a post by a maximum of one foot at the ends of a deck frame. For details on creating a post layout, see how to build a deck. Table 2 to use the table, simply find the square footage of deck being supported by the post, and match it. Decks planning and development services of kenton county. The details in this document apply to residential decks only. Joist span joists attached at house and to side of beam. A deck may consist of decking, joists and beams joined to create one structural platform. Block the second post back two joists into the deck frame as in c. See detail c ori4d for post connections double joist orstringer beam framing angle i pier block cantil ver 2x depth of joist postw2x support cleat both sides pier block on undistured soil gravel orfooting cantilever 2xdepth ofbeam max. Prescriptive residential wood deck construction guide 5 american wood council figure 1b. Appendix b provides an acceptable method of designing a.
Dca6 prescriptive residential wood deck construction guide. The implication of this is that 4x4 posts can be notched to carry a singleply beam, while notched 4x6 or 6x6 posts are allowed to carry. Deck framing page 16 beamtopost page 12 posttoconcrete page 11 joisttobeam page 14 a system of key connections throughout the deck framing, also known as a continuous load path, is essential. Attached is the deck construction guide, which is a helpful resource. Ledger double joist orstringer depth of 1v beam i i 5\ post beam detail timber post. Bottom of footing shall be a minimum of 12 below undisturbed soil 3. Typical footing detail notched post post cap figure 7. Residential deck drawings 1 choose one floor joist size with the associated span, 2 choose one floor beam size. Replacement of an existing deck replacement means that you are building a new deck in the. Appendix b provides an acceptable method of designing a deck. The term may also refer to a single level platform constructed near grade adjacent to single family residences. The intent of this tip sheet is to provide a general understanding of the code requirements and does not address the subject in great detail. Paired posts at inside corner bracket the post inside the narrower deck section to a block on the joist as in a. A copy of this document is required to be on the job site and available for each inspection.
Much of the recent discussion about deck railings originated with an article in pdbs sister publication, the journal of light construction strong railpost connections for wooden decks, february 2005. I like to use framing layouts that suit the deck design and simplify the framing. When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in. See sections 4 and 5 for determining post spacing and joist length. Decking refers to boards that form the walking surface of porches. International residential code 2 poposal stockindesign. Deck details based on the 2012 international residential code. Department of housing and urban development hud, and the steel framing alliance have worked cooperatively to introduce coldformed. Deck construction details are meant to be informative by. One way is to pour concrete in the post hole, set the post on the concrete and backfill with gravel. Align the block between the rim joist and the first inboard joist with the rim joist of the narrower deck section. Montgomery county residential deck details general notes.
Use option 3 when joists attach to the side of the beam. A new series, brought to you by cottage life, jason lake shows you common mistakes, and easy fixes for building a deck. A copy of this document must be on the job site and available during each required inspection. The deck connection and fastening guide provides instructions on how to recognize defects and deficiencies in existing decks, and guidance for building strong, safe, longlasting deck structures. Hybrid wood and steel detailsbuilder s guide preface the nahb research center, the u. Beams must be supported on each end by a post and cannot be supported with beam hangers off the house. Footing size and thickness must be in accordance with table 1. Once you have selected the size of your deck, use the joist and beam span tables to determine their size, spacing, span lengths and overhang dimensions. Figure 11 or 12, sheet 10 and figure 14, sheet 11 gp tp 4x4 post shall not be notched finished grade joisttobeam. Replacement of an existing deck replacement means that you are building a new deck in the same location and the same size as the original deck. This in depth section will teach diy builders to frame a deck, from installing a ledger board and frost footings to framing the perimeter of the deck. All bots shall have washers under the head and nut. Typical deck details based on the 2015 virginia residential code the design details in this document apply to residential, singlelevel decks only. Beam may overhang past the supporting post up to onefourth the beam span as indicated in.
Construction cannot deviate from the details herein unless prior approval is obtained by the county. You also can tie the connection together with a hotdipped galvanized beam to post connector. The connections called out below are necessary in order to. Building codes for residential decks only require 40 psf. With post cap beam secured with bolts to notched post methods of attaching beam to column ok beam splices joist to beam connection each joist shall be attached to the beam as shown. These typical deck details are provided to ensure design and construction of decks in virginia beach is consistent and code compliant. Post to footing post base is required post to footing high winds consult with jurisdiction about additional uplift loads where wind exposure is greater than risk category b.
Decks must be constructed in conformance with the details contained herein. What type of maintenance is required with trex elevations. Footings, and post connections footings must comply with all of the following. Ledger double joist orstringer depth of 1v beam i i 5\ postbeam detail timber post. Post to beam connection builtup beam guard deck design guide one and two family residential dwellings the bureau of development services bds is providing this information to help you design your deck, obtain a building permit and pass inspections. Where applicable, provisions and details contained in this document.
Prescriptive residential wood deck construction guide. If beam exceeds 4 plies, an engineered design is required for attachment of all plies. Figure 11 or 12, sheet 10 and figure 14, sheet 11 gp tp 4x4 post shall not be notched finished grade joist to beam. Prior to designing your deck, read this publication thoroughly and pay close attention to each applicable detail. Setting a post in from the corners of a deck can provide a nice visual balance to the frame. Typical deck details guard blocking decking ledger board fasteners existing house floor construction guard post attachment rim joist post beam. Based on the 2012 virginia uniform statewide building code posttobeam connection footing builtup beam rim joist connection joistto. Once you have selected the size of your deck, use the.
Deck post height measured to underside of the beam deck post size maximum height 4 x 4 8 4 x 6 8 6 x 6 10. A copy of this deck detail must be on the job site and available to the inspector. Details for a lasting deck forest products laboratory. Youll need the post layout marked before you begin. Changes to the deck code coming in 2018 professional. Two copies of building plans and supporting documents as listed on the deck plan submittal checklist, or, if using the stafford county deck detail two copies of a plan view showing beam and support post locations and sizes. Beams shall not overhang support posts by more than one foot unless a special design is approved. Deck beams with splices shall be located at an interior post location. The process of framing a deck includes creating connections between joists, beams and support posts in order to build a code compliant deck structure. All construction shall comply with the international residential code 2. Deck a general term that refers to one level of framing of a porch.
The longer the joist, the more area of deck the joist supports, and thus the beam supports. Use option 1 or option 2 when joists bear on or overhang past the beam. Any post supporting a beam splice must be a minimum of 6x6. At the point where a beam meets a post, it must be properly connected to the post in order to resist gravity. This guide will assist you in code requirements along with deck design and construction details. Deck connection and fastening guide simpson strongtie. A better option when supporting a builtup beam with a 4x4 post is nailing a 1 2in. Post height shall be measured from the top of the footing to the underside of the beam. Deck framing page 16 beamtopost page 12 posttoconcrete page 11 joisttobeam page 14 a system of key connections throughout the deck framing, also known as a continuous load path, is essential to building a safe, codecompliant deck. Construction can not deviate from the details herein unless prior approval is obtained from the authority having jurisdiction. You also can tie the connection together with a hotdipped galvanized beamtopost connector. Concrete must be used and must have a minimum compressive strength of 3,000 pounds per square inch.
Table 2 maximum post height post size maximum height 4x4 6 4x6 8 6x6 14 2. A framing plan shows the width, length, joist and beam layout. Permit and construction guidelines johnson county, kansas. Post to beam connector is required ledger to house framing see information on sheet 5 and sheet 6 joist to beam or girder 3 8d toe nailed. A few subtle changes have been made to the section dealing with beams, including the addition of singleply beams to the deck beam span table and the notched posttobeam connection detail. That article detailed testing done at virginia tech of several typical postto.
Post to beam connections shall be in accordance with section r507. Check with your local building department to verify what building codes have been. Contents guard blocking guard post attachment rim joist post beam joisttobeam footing connection kneebracing. Generally, soap and water is all that is required to clean transcend. Deck connection and fastening guide the tulalip tribes.
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