Roof rafter spacing code

    • [PDF File]CHAPTER 8 ROOF-CEILING CONSTRUCTION

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      to rafter thrust, lapped joists shall be nailed together in ac-cordance with Table R602.3(1) and butted joists shall be ... 204 2006 NORTH CAROLINA RESIDENTIAL CODE ROOF-CEILING CONSTRUCTION. of members 4 inches (102 mm) or greater in nominal thick-

    • [PDF File]SPAN TABLES FOR JOISTS AND RAFTERS

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      ROOF LOADS Rafter spans are tabulated for the most common roof loads. The loads are based on adjusted roof snow loads from the governing building code. For roof live loads less than 20 pounds per square foot (psf), rafter spans and required E values tabulated for 20 psf shall be ... psf On-center spacing, in. Live Dead 12 16 19.2 24 10 5 0.23 0 ...

    • [PDF File]CHAPTER 8 ROOF-CEILING CONSTRUCTION

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      rafters, rafter ties shall be installed. Rafter ties shall be a minimum of 2-inch by 4-inch (51 mm by 102 mm) (nomi-nal), installed in accordance with the connection require-ments in Table R802.5.1(9), or connections of equivalent capacities shall be provided. Where ceiling joists or rafter ties are not provided, the ridge formed by these ...

    • [PDF File]APPENDIX 1 8.13 Span Tables - Chicago

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      American Forest and Paper Association, as well as the requirements of the Chicago Building Code. TABLE 1: WOOD JOIST/RAFTER MAXIMUM SPANS ( for 16” o.c. spacing) WITH SINGLE ROW OF PV PANELS AT MIDSPAN (ft.) AND PANEL SUPPORT AT 32” o.c. DEAD LOAD: 14 PSF LIVE LOAD 25 PSF VARIES WITH SLOPE Joist/Rafter Size Species Grade

    • [PDF File]ALLOWABLE SPAN TABLES FOR ROOF RAFTERS

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      ALLOWABLE SPAN TABLES FOR ROOF RAFTERS California Building Code 2007 Edition (CBC), NDS 2005 Lumber: Douglas Fir-Larch, Surfaced-Dry condition (19% maximum moisture content). ... ROOF SLOPE LESS THAN 5:12 (30#/sf) ROOF SLOPE 5:12 OR GREATER (29#/sf) ... ROOF SLOPE 5:12 OR GREATER (29#/sf) SIZE RAFTER SPACING IN INCHES SIZE RAFTER SPACING IN ...

    • [PDF File]Porches and the 2020 Minnesota Residential Code

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      • Size, spacing, and direction of rafter (roof) materials. • Size and spacing of floor joists. • Size, location, and spacing of posts or applicable foundation details. • Type (grade and species) of lumber to be used. • Additional information, such as a sectional drawing or elevations, may be required.

    • [PDF File]CHAPTER 8 ROOF-CEILING CONSTRUCTION

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      remaining portion of the rafter is not less than 4-inch nominal (102 mm) and the length of the cantilever does not exceed 24 inches (610 mm). R802.1.8.2 [IRC R802.7.2] Engineered wood prod-ucts. Cuts, notches and holes bored in trusses, structural. ROOF-CEILING CONSTRUCTION

    • [PDF File]ROOF FRAMING - Construction Knowledge.net

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      valley rafter per foot of run. The difference in length of the jack rafter, spaced 16 or 24 inches (on center), is also shown in the table. Where the jack, hip, or valley rafter needs side cuts, the cut is given in the table. The other type of table gives the actual length of a rafter for a given pitch and span. Rafter Table, Type 1.

    • [PDF File]780 CMR 15.00 ROOF ASSEMBLIES AND ROOFTOP STRUCTURES - Massachusetts

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      ROOF ASSEMBLIES AND ROOFTOP STRUCTURES 780 CMR 1501.0 GENERAL 1501.1 Scope. The provisions of 780 CMR 15.00 shall govern the design, materials, construction and ... International Urban Wildland Interface Code or due to the location of the building within a fire district in accordance with Appendix D. b.Non-classified roof coverings shall be ...

    • Table 1. Maximum Horizontal Anchor Spacing

      anchor horizontal spacing to ensure that a roof structure is not overloaded under either downward loads or wind uplift loads. Table 2. Roof Rafter Maximum Horizontal Span (feet - inches)1 Assumed Vintage Nominal Size Actual Size Non-Tile Roof Tile Roof Rafter Spacing 16” o.c. 24” o.c. 32” o.c. 16” o.c. 24” o.c. 32” o.c. Post-1960

    • [PDF File]ALLOWABLE SPAN TABLES FOR ROOF RAFTERS

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      ALLOWABLE SPAN TABLES FOR ROOF RAFTERS California Building Code 2007 Edition (CBC), NDS 2005 Lumber: Douglas Fir-Larch, Surfaced-Dry condition (19% maximum moisture content). ... ROOF SLOPE LESS THAN 5:12 (35#/sf) ROOF SLOPE 5:12 OR GREATER (34#/sf) ... ROOF SLOPE 5:12 OR GREATER (34#/sf) SIZE RAFTER SPACING IN INCHES SIZE RAFTER SPACING IN ...

    • [PDF File]Roof Sheathing Fastening Schedules for Wind Uplift - Murphy Company

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      c. For median roof height 35 feet or less. d. Gable wall height of 8 feet or less from top floor ceiling to roof peak. e. Provide adequate uplift hardware at truss-to-wall connections. Such connections are beyond the scope of this publication. f. When wind speed is 110 mph or greater and when median roof height is between 25 and 35 feet,

    • [PDF File]Guideline-17 - Escondido

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      2 Minimum Slopes 1/4" in 12". Roof surfaces with a slope of less than 1/4" in 12" are considered to be flat roofs. Flat roofs must be designed to accommodate potential ponding of water. This Span Chart shall not be used for Flat Roof Design. 3 DL (Roof dead load)= 15 psf Max. Roofing Load: 6psf (Asphalt Shingles) 4 LL (Roof live load) = 20 psf

    • [PDF File]ROOF-CEILING CONSTRUCTION

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      Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors: HG/HR Rafter Span Adjustment Factor 1/3 0.67 1/4 0.76 1/5 0.83 1/6 0.90 1/7.Sorless 1.00 where: fI Height ofceiling joists or rafter ties measured vertically above the top of the rafter support walls.

    • Roof Assemblies – Significant Changes to Roofing ... - Florida Roof

      The 7th Edition (2020) Florida Building Code includes several key changes to the requirements for roof assemblies. Many changes strengthen the code to ... for fastener type and spacing). Sealed Roof Deck Option #2 *Synthetic underlayment meeting the per- ... Rafter/Truss Spacing 24 in. o.c. Wind Speed 140 mph 150 mph 160 mph Min Sheathing ...

    • Table 1. Maximum Horizontal Anchor Spacing - Long Beach, California

      anchor horizontal spacing to ensure that a roof structure is not overloaded under either downward loads or wind uplift loads. Table 2. Roof Rafter Maximum Horizontal Span (feet - inches)1 Assumed Vintage Nominal Size Actual Size Non-Tile Roof Tile Roof Rafter Spacing 16” o.c. 24” o.c. 32” o.c. 16” o.c. 24” o.c. 32” o.c. Post-1960

    • [PDF File]Roof Assemblies - Florida Building

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      Rafter/Truss Spacing 24 in. o.c. 140 Wind Speed mph 150 mph 160 mph Minimum Sheathing Thickness, inches Exposure B 7/16 (24/16) 15/32 (32/16) 19/32 (40/20) ... Section 1620) of the Florida Building Code, Building, roof diaphragms, connections of the roof diaphragm to roof framing members, and roof -to wall connections shall be ...

    • Structural Criteria for Residential Rooftop Solar Energy ... - Anaheim

      1) Measured roof slope (e.g. 6:12): 2) Measured rafter spacing (center-to-center): :12 inch 3) Type of roof framing (rafter or manufactured truss): Rafter Truss 2. SOLAR ARRAY CHECKS A. Flush-mounted Solar Array: 1) Is the plane of the modules (panels) parallel to the plane of the roof? Y N

    • [PDF File]Structural Criteria for Rooftop Solar Energy Installations

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      Roof Slope Rafter Spacing 16” o.c. 24” o.c. 32” o.c. Photovoltaic Arrays (4 psf max) Flat to 6:12 o0o to 26 5'-4" 6'-0" 5'-4" ... Table 1 assumes that the roof complied with the building code in effect at the time of construction, and places limits on anchor horizontal spacing

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