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Maximum deck height without railing

What is the maximum height of a deck without railing

Subsequently, one may also ask, how high can a deck be without a railing in Ontario? The height of the guard must not be less than the minimum of two feet, 11 inches if the elevation is not more than five feet, 11 inches. The top rail should not be less than 36 inches from the deck surface in a residential dwelling The reason for the lower height is to allow people to see over the top of a railing when seated. What is code for deck post spacing? For Building a Deck Railing, Deck Frame, or Fence The maximum spacing of 4×4 deck posts should be 6 feet on center, while the maximum spacing of 6×6 deck posts should be 8 feet on center All decks higher than 30 above grade must have a guardrail. If you choose to install a guardrail on a deck lower than 30, the railing must still meet code requirements. Decks attached to single family detached homes are generally regulated under the rules of the International Residential Code (IRC) A minimum of 36 inches 915 mm is provided between handrails. In Canada the maximum height from the ground is 24 inches. There is no maximum height. Keeping this in consideration how high can a deck be without a railing in Ontario. The IRC requires guardrails to be at least 36 in height measured from the deck surface to the top of the rail

The 2012 International Building Code (IBC 2012) generally requires guardrails when the difference in elevation between the upper and lower surfaces is 30 inches or greater. 1013.2 Where required Some decks are not required to have guardrails, provided those decks are no more than 30 inches above grade. If you see a deck that has no guardrails (also called a low-rise deck), this might be the reason: Its height is below 30 inches. Guardrails on Low-Rise Decks

Deck railing height is a minimum of 36. In some states such as California, the minimum height is 42. There is no maximum height. A railing is only necessary if the deck is 30 or more off the ground, and 24 in certain jurisdictions The minimum height of the railing varies based on the height of the deck. Decks 24 to 5-10 (180 cm) need 36 guards and anything above 5-10 requires a 42 high railing. Respect Minimum Height Requirements Safety is important and something that should always supersede style my information is that 30 is the maximum height without a handrail. I don't have a reference off the top of my head, but I'm sure it's in the building codes. JAE (Structural) 11 Jan 12 18:35 spats - see my post - second from the top with the IBC reference Guards are required when then deck is 24 (60 cm) above grade. The minimum height of the railing varies based on the height of the deck. Decks 24 to 5-10 (180 cm) need 36 guards and anything above 5-10 requires a 42 high railing My question is how high can the deck be without railing or a step down. I believe that the IBC or ICC code is 30 from grade level to the deck surface. DLP600 said: Right now the heights vary between 15 in a corner near the house to a low of 8 on the front of the deck

FAQ: How high can a deck be without a railing

Deck Railing Height Codes & Requirements Decks

Most building departments in Canada require 42 high guardrails. Deck Rail Height. Measure from the deck floor to the top of the rail between posts. This must be at least 36 high to meet IRC requirements. Make sure your sweep space and all infill openings will not allow a 4 sphere to pass through For low level residential decks the balustrade should be set at a minimum height of 900mm on both stairs and landings and resist a minimum horizontal uniformly distributed line load of 0.36kN/m, a uniformily distributed load applied to the infill of .5kN/m2 and a point load applied to part.of the infill of 0.25kN

The handrail, itself, should be easy to grip, with a minimum diameter of 1 1/4 inches and a maximum diameter of 2 1/4 inches. You can't use a two-by-four but a two-by-two as a handrail would. In other words, a deck less than one metre (1m) above ground is not required to have a handrail, though depending on the height it may still be recommended. Decks four metres (4m) from the ground or higher need to meet additional design requirements

Whatever the height of the decking, there should be no gaps big enough for a 100mm sphere to pass through it. Lower level decks are those which are raised no more than 300mm off the ground. For this platform height in a domestic property, any railings or balustrades should be at least 900mm higher than the deck itself Deck railing height should be a minimum of 36 for any platform elevated to 30 and more from the surface. The maximum space between the bottom rail and the surface is 4. The same gap is allowed between the decorative elements of the deck railing. Minimum stair railing height has to be 34 from the top rail to the nosing The standard handrail height depends on the elevation and the area of your home. If the elevation of your deck is more than 30 inches, you definitely need a handrail. For a single-family living in a detached home, the handrail height in Ontario is 36 inches. This includes the space between the platform and the top rail

Sturdy deck railings are an important safety feature for raised decks and are required by code for any deck 30 in. or more above grade. Building codes define the minimum height and strength of the railing system, as well as the size of gaps in the railing - they must be small enough that a small child cannot slip through In light of this determination, where the ground slopes gradually away from a deck a reasonable approach is to measure the height of fall at a distance of 1200mm out from the deck. Determination 2008/081 Safety barrier to a deck located adjacent to a retaining wall. Building consents for low decks. A low deck may not need a building consent In domestic and residential areas, railings on outdoor roofs and balconies must be at least 1.1 metres high. Any railing used on stairs or balconies must have gaps of under 99mm in all directions so that children can't pass between them. Ideally, they will achieve a visual contrast against their surroundings and the bottom rail of a guard at the open side of a stairway may be of such size that a sphere of 6 inches in diameter cannot pass through. 11. Stairs - Stairways shall be a minimum of 36 inches in width. The maximum riser height shall be 8 inches (3/8 inch maximum variation in riser height) and the minimum tread depth shall be 9. 1. Deck Guards: a. Deck guardrails shall be a minimum of36 inches (914 mm) in height and constructed to withstand a concentrated load of 200 pounds (91 kg) applied at any point and in any direction along the top railing member. IRC 312.1 b. Open guards shall have balusters or be of solid material suc

mm) above the porch or deck on the interior side of the screening. The protective bar shall be capable of resisting a horizontal load of 50 pounds per lineal foot (730 N/m) without contacting the screen and be a minimum of 1½ inches (38 mm) in height. 312.2 Height A: The answer to your question is yes you do need a railing and no you don't need a railing. The parts of your deck that are 12 inches off the ground do not require a railing. They do not require anything at all. The parts of your deck that are 26 inches off the ground do need a railing. Any area of your deck that is more the 24 inches off. Overall Dimensions of Deck Elevations drawn at a recognizable scale including: Deck Height off of Grade Pier Depth & Size Footing Depth & Size Railing/Guard Height & Details Permits are completed in the order that they are received and take approximately 10 working days to process Posted 29 April 2008 - 12:53 PM. Know this may not be totally relevant, but I was always told that any height above 230mm (9) should be provided with a step, as the 230mm was a maximum comfortable height to step up. As for the OP's question I'd suggest that you should add a step. To old to rock and roll, To young to die Stairs. The steps of the deck must be at least 36 inches wide. The step riser, which is the vertical part of the stair that raises the step above the previous one, can reach a maximum of 8 ¼ inches high (minimum 4 inches). The tread, or part of the stair that you walk on, must have a minimum depth of 9 inches, and approximately a 1-inch nosing.

2) Deck construction plans (see below). 3) Location of deck on property in relation to home/building. 4) If applicable-wetlands approval and/or zoning variance. CODE SPECIFICATIONS Stairs : Stair Riser Height ± 8-1/4 ´ maximum . The minimum riser height shall be 4 inches. The greatest riser height within any flight o Sturdy deck railings are an important safety feature for raised decks and are required by code for any deck 30 in. or more above grade. Building codes define the minimum height and strength of the railing system, as well as the size of gaps in the railing - they must be small enough that a small child cannot slip through and below the handrail height, including treads and landings, shall not be less than 31-1/2 where a handrail is installed on one side and 27 where handrails are provided on both sides. Treads and Risers: The maximum riser height is 7 3/4 and the minimum tread depth shall be 10. The riser height shall be measured vertically between.

(iv) Elimination of overhang of rail ends unless such overhang does not constitute a hazard; such as, baluster railings, scrollwork railings, paneled railings. (4) You must ensure that a standard toeboard is a minimum of 4 inches nominal in vertical height from its top edge to the level of the floor, platform, runway, or ramp In the developed area, the maximum height for a deck that is not located on the same facade as a basement walkout entry is 1.5 m. the maximum height is 2.0 m. A railing 0.90m (3'-0) high is required if the distance from the surface of your deck to adjacent ground level is less than 1.8m (6'-0). Deck railing height standards can vary from state to state but typically require a 36″ or 42″ railing. In California, deck railings are required to be a minimum of 42″ tall measured from the deck surface to the top of the guardrail. Typical loading requirements dictate that guardrails should be strong enough to withstand 200 pounds of.

1910.29(b)(1) - A standard railing shall consist of a top rail, an intermediate rail, and posts, and shall have a vertical height of 42 inches, plus or minus 3 inches, above the working-walking surface. 1910.29(k)(1) - A standard toeboard shall be 3 1/2 inches in vertical height from the top edge to the bottom level of the floor, platform, runway, or ramp Type of footing forms Size and spacing of joists Size of deck Size and spacing of posts Type of floor boards Distance to property lines Type of lumber Height of deck off ground Plans shall be 8 ½ x 11, or 11x17 Footings: Shall be at least 42 inches deep by 8 inch diameter. Footing forms shall be cardboard tubes. Deck footings are subjec All you'd need is a post at the bottom, a post at the top and a graspable handrail between them. Finally, when a handrail is needed it is installed at a plumb height of 34 in. to 38 in. off the plane of the stair tread nosings. Many years ago the handrail height was lower and many people don't realize it has increased Cantilever Deck 36 min. IRC min.2500 psi concrete concrete to be contained only within native undisturbed soil guardrail see page 7, 8 & 9 R312 guard height 2x facia w/ (3)-16d galv. nails to joists Beam spans Table see sheet 11 Simpson PC4Z/PC6Z or equal-beam to post connection-w/Simpson H2.5T each joist See deck post height for maximum height You may have to add a middle rail to support the balusters if you exceed 36 inches. Balusters can only be a maximum of 4 inches apart (so that a 4 spherical object cannot pass through them. See our porch railings calculations guide. In most cases, you are required to have a railing when the floor of your porch is 30 inches or more above grade

9.8.3.3. Maximum Height of Stairs (1) The vertical height between any landings shall not exceed 3.7 m. 9.8.4. Step Dimensions 9.8.4.1. Uniformity and Tolerances for Risers and Treads (1) Except as provided in Sentence (2), risers shall have uniform height in any one flight with a maximum tolerance of David from Crimson King General Contracting in New Lowell. 8/4/2014 at 12:14:30 PM. Maximum spacing is 4 feet on center if posts stick up above top rail, if you have a continuous top rail then 6 feet. Unless you have a pre engineered rail system going in then these are the guidelines. Every municipality will sometimes have their own preferences. PRESCRIPTIVE DECK 2017 ORSC NO. DATE Guard post to joist connection S05 NTS 3 Details S05 Deck guard S05 NTS 1 Decking connection S05 NTS 4 Deck guard S05 NTS 2 6'-0 MAX POST SPACING 36 MIN [R312.1.2] OPENINGS SHALL NOT ALLOW THE PASSAGE OF A 4 DIAMETER SPHERE [R312.1.3] SEE DETAIL 2/S05 2X6 OR 5/4 BOARD RAIL CAP ATTACHED TO EACH POST WITH. Florida Deck Building Codes. Building a deck requires careful planning. Regardless of the material you use, you need to be aware that Florida has strict guidelines for deck building. Florida Building Code Requirements for Decks. If you plan on building a deck on your own, we still recommened seeking the advice of a professional deck builder The height of a railing is measured from the top of the floor boards to the top edge of the railing. If a deck's floor surface is more than 30 inches from the ground it must have a railing

Height of the deck is measured from the top of the platform to finish grade. Proper strap required to secure stringers to header. 3 - 2 x 12 stair stringers #2 SYP treaded. 4 diameter sphere may not pass through risers over 30 above grade. All field cuts shall be treated Handrail height is min. 34 to 38 max TABLE 1: DECKING REQUIREMENTS AND MAXIMUM JOIST SPACING. Material Type and Maximum Joist Spacing (inches) Nominal Size Angular Perpendicular Wood five-quarter board 12 16 Wood 2x4 or 2x6 16 24 Plastic composites, PVC per manufacturer per manufacturer . Version: 2012.1, 6/6/2016 . City of Virginia Beach, Virginia Typical Deck In Canada the maximum height from the ground is 24 inches. If your porch floor is over the heights stated, the code requires a balustrade - porch railing. The problem is that the building code porch rail height must be at least 36 to 42 inches. Well, that may not sound high to you but in almost all cases that is entirely too high Maximum 12′-3″ vertical height (rise) for a flight of stairs. Maximum 7-3/4 inch stair riser height. Minimum 10 inch stair tread depth with nosing or Minimum 11 inches with no nosing. Handrail graspability to be either Type I or II with a Minimum 1-1/2 inch clearance from a wall. Handrail height to be placed a Minimum 34 inches to 38 inches Deck Construction Bulletin IB-900 Type I. Handrails with a circular cross-section of not less than 1-1/4 nor greater that 2 in diameter. If the handrail is not circular, it shall have a perimeter dimension of at least 4 inches and not greater than 6¼ inches with a maximum cross section dimension of 2¼ inches

Maximum Porch Height Without Railing Railing Desig

Guardrails Best Practices for Decks & Porches: This article describes recommended construction practices for deck safety, deck railing requirements, guard railing construction and building codes, and critical safe-construction details for deck and porch rails, guardrails, and exterior stair guard railings and handrails Handrail and Stair Rail Systems • If a stair has a minimum of four risers, a handrail is required. • Handrails must be between 30 and 38 inches as measured from the leading edge of the stair tread. • Stair rail system: • Top rail may also serve as handrail if height of the system is between 36 and 38 inches 4. Factor in function. One of the most popular trends right now - especially among homeowners who like to entertain outdoors - is cocktail railing.This design approach uses a deck board as a top rail to create a flat surface ledge at just the right height for holding drinks and plates

What is the maximum height for a terrace without a guard rail

load, a handrail shall be installed such that no position on the stair or ramp is more than 825 mm (32) from a handrail. Ie. The maximum width on a ramp is 32 without a grabbable rail. 3. A handrail is not required for stairs and ramps serving a house or an individual dwelling unit, where, A. interior stairs have not more than 2 risers Handrail Height: 34 to 38 inches: The distance between the stair nosing and top of the railing. Maximum Projection of Railing From Wall: 4-1/2 inches: This rule is designed to provide enough walking space up and down the staircase. Minimum Hand Clearance From Wall: 1-1/2 inches: This rule is designed to provide clearance for the hand on the. • The bottom edge of the pane is less than 18 inches above the walking surface of the deck, and • The top edge of the pane is greater than 36 inches above the walking surface of the deck. In the absence of safety glazing, a horizontal rail across the window must be installed. The rail must meet the requirements of a stair handrail per Page 25 Tweet. #9. Re: Ontario code requirement for deck railings. 07-04-2012, 08:17 AM. Re: Ontario code requirement for deck railings. In Ontario any deck over 2 ft off the ground has to have a 36 railing . Second storey deck is 42 , Spacing of the spindles is 3 1/2 or less . Comment. Post The maximum height in the front setback is 4 feet. The maximum height in the side and rear setbacks is 6 feet. Additional HOA restrictions or approvals may be required. For more information See Municipal Code Section 18.07.120. Residential fences do not require a building permit unless the fence is: In a critical area. More than 6 feet in height

The first drawing would not be compliant with the height requirements in §1910.23(e) because the height of the standard railing on the stair landing is less than 42 inches nominal. However, OSHA would consider the 36- to 37-inch height of the railing in the first drawing as a de minimis violation of the standard Show dimension of deck; location of all footings and distance between footings. All framing lumber dimensions including post size and height, load bearing girders, floor joist and spacing, deck material to be used, handrail details with the height for the steps and the guardrail details including height and picket spacing is required The measurement of 865 millimetres can be taken vertically anywhere along this line to the bottom of the railing. As with balustrades for decks and balconies, gaps in railings on stairs cannot have openings greater than 125 millimetres. For stairs of more than four metres in height, a railing must also not have any climbable elements, such as. Secure the Posts. Bolt the posts to the inside of the rim joists. Maximum spacing of posts is 72 inches on center. Bolts should be vertically spaced no less than 5-1/8 inch apart. For a composite railing system, slide the post sleeve over the wood post, then the post sleeve skirt over the post sleeve; both should rest on the decking Baluster opening between vertical members (maximum sphere passage <= 4 3/8) Baluster opening in triangular area below guard bottom rail and stair tread (maximum sphere passage <= 6) Hand-railing heights are given: U.S. handrails for stairs with one side against a wall: 30-38 U.S. handrails at open stairs: 34-38 above the stair

Deck Code Guidelines for Guardrails and Stairway Railing

These guardrails must be between 30 and 42 inches above the stair tread or balcony floor and be continuous, covering the full length of the staircase and the full length of the exposed edge of the balcony or landing. Any gaps in the guard-barrier must be small enough to prevent a sphere with a diameter of 6 inches passing through the gap A deck is one project that absolutely requires checking into local building code requirements. Codes may specify setback distances from property lines, restrictions on deck height, and certain construction details, such as how to attach the deck to existing structures, or stair and railing details. Lumber for Decks Lumber for outdoor projects.

Standard Deck Railing Height: Code Requirements and Guideline

Cap Rail Cap Rail: Always include a strong, rigid cap rail that is securely fastened to all posts. The size should be based on load strength needs and local code requirements. Railing Height: Minimum height should be 42 or as set per local code. Cable Spacing: Maximum three inches apart to allow for cable deflection if ever forced apart : Guideline -Building Industry and PolicyDeck, balcony and window safety March 2017 Page 7 of 21 Stairs Balustrades or railings on stairs are equally as important as those for decks and balconies. When people ascend or descend stairs, they generally gain support using the railing, which can also act as a barrier Handrail Specifications. The height of a proper handrail must range from 900 mm to 1100 mm, and should be consistent throughout the stairway, ramp, or landing. When Should Balustrades or Barriers Be Used? Balustrades or barriers are meant to prevent people from falling off stars, a ramp, a floor, a balcony, and the like **R311.5.6.1 Height. ** Handrail height, measured vertically from the sloped plane adjoining the tread nosing, or finish surface of ramp slope, shall be not less than 34 inches (864 mm) and not more than 38 inches (965 mm). **R311.5.6.2 Continuity From the 2003 International Residential Code: 311.5.6 Handrails. Handrails shall be provided on at least one side of each continuous run of treads or flight with four or more risers. - Maximum.

Deck Railing Height Diagrams & Code Tip

to have an open railing four feet above the maximum allowed height for houses. Residential Small Lot Zones. If you are building a deck on a residential small lot, please come in to the ASC to discuss your project with our staff. Lowrise 1, 2 and 3 Zones. If you want to build a deck addition to a single-family residences in thes Maximum Joist Span The leverage from a deck railing post will twist the rim joist Handrail height is min. 34 to 38 max. Handrail for stairways shall be continuous for the full length of the flight and returned at the top and bottom newel post. Stairway illumination. All interior and exterior stairways shall be provided with a means t Up until 2015, building codes pretty much ignored deck posts except to establish a minimum 4x4 wood (or a 3-in. dia. steel) cross section. But in 2015, the IRC introduced Table R507.4, which limited the height of a 4x4 deck support post to eight feet, without any consideration for how much area of deck the post was supporting

Mirage Post Topless Tempered Glass Railing System

How high must a platform be to require a handrail

  1. imum/maximum allowed by code. If you want your deck to be stiffer, increase the size, reduce the span, or reduce the spacing of your joists. Note: The footings must bear on native soil. The footing details require a footing that is a
  2. There is no standard height for a grade-level deck—the maximum measurement from grade to the deck surface could be 6 inches, 12 inches, 24 inches, or more. But generally speaking, I apply the term to decks that are up to 30 inches above grade, since guardrails are required for any decks that are higher than that
  3. RESIDENTIAL DECK CONSTRUCTION stair and railing details, and a plot plan showing distance to the lot lines shall be submitted to the Inspections Department. Questions regarding these codes—contact the Department of Inspection and Electrical Systems at (715) 261- live loads and wind loads acting upon it without exceeding the allowable.
Guardrails: Guide to Guard Railing Codes, Specifications

Deck Building Code Requirements - Checklist & Tips DecksG

  1. Railing IBC Code Cheat Sheet Guardrail 1. IBC 1015.2: Guards shall be located along open sided walking surfaces that are located more than 30 measured vertically to the floor or grade below at any point. 2. IBC 1015.3: Required Guards shall be not less than 42 high with the exception of occupancies not more than three stories above grade within individual dwelling / single family units whic
  2. The height is measured vertically above the walking surface or the line that connects the nosing of a set of stairs. Since guards must also be provided at stairs that have a drop of more than 30 inches they are allowed to be at a height of no less than 34 inches when the guard does not act as a handrail
  3. Here are tips for railing installation: (1) Pre-built kits are significantly more difficult to trim to precisely match deck posts, where there may be a bit of angle between the top and the bottom. We always use (and recommend) standard kits, where you install the bottom rail, the balusters then the top rail
  4. al from the upper surface of the top rail to floor, platform, runway, or ramp level

Deck Height w/out step DIY Home Improvement Foru

a. Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with FigureR507.9.1.3(1). b. Maximum 5 inches. c. For engineered rim joists, the manufacturer's recommendations shall govern. d All posts shall be 4x4 inches up to a height of 8 feet and 6x6 inches beyond that. However, maximum post height is limited to 10 feet. It is recommended to use 6x6 inches posts in all situations because they are stronger and more durable than 4x4 inches posts. The height of the post is measured from the footing to the post attachment t New homes will not be granted a certificate of occupancy without them. And other permitted work (ex. new deck, retaining wall etc.) will not receive final approval until fall protection is in place. IRC codes require a railing no less than 36 tall for any potential fall greater than 30

California Code of Regulations, Title 8, Section 3209

  1. • Ends of handrail and systems do not present any projection hazards. • Load Requirement: withstand a 200 pound load applied in a downward or outward direction within 2 inches of the top edge of the top rail. POST POST TOP RAIL INTERMEDIATE VERTICAL MEMBER MID RAIL POST 42 in (±3 IN) (107 CM ±8 CM) 42 in (±3 IN) (107 CM ±8 CM) 19 IN (48.
  2. In New York City, roofs, balconies, or terraces with slope of 2.4:12 or less and height of 22 feet or greater require railings per 2014 NYC Building Code, Section 1509.8. Often, older buildings may comply with the code under which they were constructed
  3. imum of 1 1/4-inch diameter standard steel pipe rails supported by a
  4. Railings: the United States for a stair with a side against the wall: 30-38. Railings: United States handrails for open stairs: 34-38″ above the stairs; Railings: Canadian stair handrails above the stairs: 32-36. Railing Types. Guardrails: This is a safety railing or barrier constructed along a horizontal surface such as a deck, porch.

Expert Deck Inspectors: Codes for Deck Railings Deck

R311.8.3.1 Height. Handrail height, measured above the finished surface of the ramp slope, shall be not less than 34 inches (864 mm) and not more than 38 inches (965 mm). R311.8.3.2 Grip Size. Handrails on ramps shall comply with Section R311.7.8.5. R311.8.3.3 Continuit Handrail & Guardrail Height. Handrail & guardrail are commonly confused as being the same component of a railing system. Guardrail refers to the structural railing element that sits atop a railing system. A guardrail is typically required for stairs with 4-or-more risers, or for a deck or balcony with 30 inches above grade Maximum riser height shall be 8 1/4 inches. Minimum tread depth shall be 9 inches 780 CMR 3603.12 : Landings - Interior Landing - 36 inches x 36 inches Exterior Landings - 48 inches wide by 42 inches deep The floor area or landing shall not be more than 1 1/2 inches lower than the top of the threshol

  1. The added height creates a greater force on the railing so the way we connect our railings has become even more important to your safety. We block the railing post then use a threaded rod through the post to a steel connector attached to the joist. Do not allow someone to only lag or nail a railing post to the outside of your deck
  2. al) height of your deck joists. For example, a 42 railing with a 2x10 joist requires a post that is 51 1/2
  3. The top of the railing must be least 1 metre (1000mm) from the ground. Any opening must not allow a 125mm sphere (ie childs head) to pass through. So the vertical components must not be more than 125mm apart. The gap between the balcony surface to the bottom rail must be no more than 100mm. For balconies with a fall height of more than 4m there.
  4. imum of 36 for any platform elevated to 30 and more from the surface. The maximum space between the bottom rail and the surface is 4. The same gap is allowed between the decorative elements of the deck railing
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Step 1: Cut Posts. SCD_154_02.jpg. Posts are as long as the height of the railing, plus the width of the joist and the thickness of the decking, minus the thickness of the rail cap. Set up a jig that allows you to cut all the posts to the correct length. A 22-1/2-degree angle cut on the bottom adds a decorative touch maximum 1/2 (13 mm). Cutting Deck Board 6. Cut deck boards to appropriate length of railing span, remembering to include extra space on each side of the deck board to allow for attachment to the post. Decking boards must cover 1/2 of the pressure-treated post to allow this to be fastened later. 36-1/8 (918 mm) or 42-1/8 (1070 mm) 36-1/8 1a The 9039 rail cap is designed to act as a grab rail in hand rail situations. The 9002 and 9023 caps can run over our 1-3/4 and 2-1/2 posts. 9023 and 9036 are designed to butt cleanly with our 3-1/2 post. The 9002 and 9023 rail caps are semi-flat top railing - popular by those that prefer the 2 x 4 look and feel Maximum Allowable Height for a 4×4 Deck Support Post. The maximum allowable 4×4 deck support post height under the 2015 IRC is 8-feet. The longer a post, the more likely it is to bend under load than shorter posts, thus the limit set on the height of 4×4 posts Framing Plan (Page 4). Overall length and width of deck, length of landing and stair, pier spacing, joist span and maximum height of the deck above grade. 2. Once you have your joist span, and pier spacing you can size each component of the deck using Tables 1 and 2 below. 3