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5/18/10 Building Guide Colorado Chapter of the International Code Council Single Family Residential Uncovered Decks and Porches How to Use this Guide Provide two sets of plans, drawn to scale and complete the following (hint: use graph paper with squares. Example: ¼” = 1 1. Complete this Building Guide by filling in the blanks on page two, and indicating which construction details will be used. 2. Provide 2 Plot Plans (site plan) showing dimensions of your project or addition and its relationship to existing buildings or structures on the property and the distance to existing property lines drawn to scale. 3. Fill out a building permit application. The majority of permit applications are processed with little delay. The submitted documents will help determine if the project is in compliance with building safety codes, zoning ordinances and other applicable laws. The Colorado Chapter of the International Code Council is a professional organization seeking to promote the public health, safety and welfare to building construction. We appreciate your feedback and suggestions. To obtain a master copy of this building guide, please write to the Colorado Chapter of the International Code Council, P.O. Box 961, Arvada, CO 80001. http://www.coloradochaptericc.org Plan Size Requirements: Plans must be no larger than 11”x17” in size. This handout was developed by the Colorado Chapter of the International Code Council as a basic plan submittal under the 2009 International Residential Code. It is not intended to cover all circumstances. Check with your Department of Building Safety for additional requirements. City of Lafayette Community Development Dept. 1290 S. Public Road Lafayette, CO 80026 ---PAGE BREAK--- 5/18/10 Single Family Residential Uncovered Decks and Porches Directions 1. Fill in the blanks. Please print legibly. 2. Indicate in the check box which detail from page 3 will be used. Size and Amount of Lags (example: Two I/2”x 4 1/2” lags @ 16”O.C.) 36” high guard with balusters spaced so that a 4 Inch diameter sphere cannot pass through Beam splices to occur over posts with 1 1/2” bearing Existing bldg. Type of decking - (example: I x 4 or 2 x 6 - Trex) Electrical outlet required on decks over 20 sq ft Appr’ flash ing required I Attach decking with non corrosive fasteners V_Check_one \_f—lA ‘UDetailB I I Alternate Detail Bi I LU Alternate Detail B2 I (see page 3) J (see page 3) - joists spaced apart (example: 2 x 10” spaced 24” apart) ci, -E CD L) x beam •2 (example: 2 x 10 - see detail B) — rim joist (example:2x 10-see AlternateBi & 82) C - posts spaced apart C (example: 4 x 4 posts spaced 8 apart) .9 Span (example: 13-4”) CD — — — Type of siding (existing) Conditions such as attachment to cantilevers or veneers may require Engineer’s approval Soan Finished grade Note: Emergency escape windows are allowed to be installed under decks and porches provided the location of the deck allows the emergency escape window to be fully opened and provides a path not less than 36” in height to a yard or court. 6’8” required for walk out basements or patios. U, ci, C.)C CD Note: A plot plan (plan view) showing the dimensions of your project or additions and its relationships to existing buildings or structures on the property must be included. In addition to project dimensions, your plot plan must also show other details such as post locations and spacing, joist and beam spans, and any other pertinent information not shown on the section drawing. This handout was developed by the Colorado Chapter of the City of Lafayette International Code Council as a basic plan submittal under the 2009 International Residential Code. It is not intended to Community Development Dept. cover all circumstances. Check with your Department of 1290 S. Public Road Building Safety for additional requirements. Lafayette, CO 80026 ---PAGE BREAK--- 5/18/10 Existing building 7 —Approved flashing required behind existing siding / Attach to joists with non-corrosive fasteners _j Attach ledger to existing bldg. with non-corrosive lag bolts , spaced mm. 16” apart. Locate bolts to penetrate rim joist or wall studs. Conditions such as attachment to cantilevers or veneers may require Engineer’s approval 1/2w (mm.) diameter anchor bolt embedded 7” mm. into concrete pier or the equivalent Finished arade Beam splices to occur over posts with 1 1/2” bearing T 7 1 Beam splices to occur over posts with 1 1/2” bearing City of Lafayette Community Development Dept. 1290 S. Public Road Lafayette, CO 80026 Single Family Residential Uncovered Decks and Porches Non-corrosive metal joist hanger Approved flashing Non-corrosive metal joist hanger Secure balusters to beam Non-corrosive metal post/beam connector Secure balusters to beam Beam splice occur over posts with 1 1/2” bearing Non-corrosive metal post/beam connector Full depth 2x solid blocking Secure balusters to beam 24” max. 4 Non-corrosive metal — post/beam connector 8’ (mm.) diameter pier Non-corrosive metal post anchor 8” mm. If less than post must be decay resistive 2 U) This handout was developed by the Colorado Chapter of the International Code Council as a basic plan submittal under the 2009 International Residential Code. It is not intended to cover all circumstances. Check with your Department of Building Safety for additional requirements. ---PAGE BREAK--- 5/18/10 Single Family Residential Uncovered Decks and Porches - — - - 36” mm. height E = Type I 1 1/4” - 2/4” max. 1h/2” min.— 1 1/4” - 2” Gripable 13/4wau or other surface 1 1/2” mm. City of Lafayette Community Development Dept. 1290 S. Public Road Lafayette, CO 80026 Deck Stairway Notes: 1. Stairways shall be not less than 36” in width. 2. Stairway rises shall be not greater than 7 3/4”. 3. Stairway treads shall have a minimum run of 10”. 4. The length of Run and the height of Riser shall not vary more than 3/8” in the entire run of the stair. 5. Stairs are required to be illuminated. 6. Open risers permitted if opening is less than 7. A nosing not less than 3/4” but not more than 1 1/4” shall be provided on stairways with solid risers, and less than 11”. 8. Composite materials (example:Trex) may require 4 stringers New or existing Open guardrails on decks more than 30 inches above grade or a floor below shall light required have members spaced so that a 4 inch diameter sphere cannot pass through. Guardrail 4 Openings for required ii’ — — guards on the sides of stair treads shall not allow a4 3/8” diameter sphere to pass through. 34-38” above — Le than nosings 6 dia. Handrail (see details below) 10” mm. run from nosing to nosing Open risers less than 4” — 36” Mm. 7 3/4” max. rise Guardrail required if more than 30” / Landing same / width as stairs Finished grade Handrail Notes: 1. Handrails shall be continuous on at least one side of stairs with 4 or more risers. 2. Top of the handrails shall be placed not less than 34 inches nor more than 38 inches above stair nosings. 3. The handgrip portion of handrails shall be not less than 1-1/4 inches nor more than 2 1/4 inches in cross section for non circular handrails. 4. Handrails shall be placed not less than 1-1/2 inches from any wall or other surface. 5. Handrails to be returned to wall, post or safety terminal (per 311.7.7.2 IRC) Type II / / j/ N / This handout was developed by the Colorado Chapter of the International Code Council as a basic plan submittal under the 2009 International Residential Code. It is not intended to cover all circumstances. Check with your Department of Building Safety for additional requirements. [