Georgia Amendments Prescriptive Deck Details Manual

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Georgia Amendments

Prescriptive Deck Details

Based on the 2012 International Residential Code

This design document applies to single-span, single-level residential decks only.

Decks must be constructed in conformance with the details contained herein. A

copy of this deck detail must be on the job site and available to the inspector

during each required inspection.

Prescriptive Deck Details

Sheet 1 of 22

Georgia Amendments-

05/23/12

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Summary of Contents for Georgia Amendments Prescriptive Deck Details

Page 1 Georgia Amendments Prescriptive Deck Details Based on the 2012 International Residential Code This design document applies to single-span, single-level residential decks only. Decks must be constructed in conformance with the details contained herein. A copy of this deck detail must be on the job site and available to the inspector during each required inspection.
Page 2: Table Of Contents
Joist-to-Beam Connection........7 Guards ............14 Joist Hangers ........... 7 Guard Post Attachments ........15 Posts .............. 7 Stair ............. 16 Footings ............8 Safety Glazing ..........22 Ledger Attachments ......... 9 Prescriptive Deck Details Sheet 2 of 22 Georgia Amendments- 05/23/12...
Page 3: General Requirements
40 PSF. Installation shall be in conformance to the evaluation report and the manufacturer's installation instructions which must be available to the inspector. Prescriptive Deck Details Sheet 3 of 22 Georgia Amendments-...
Page 4: Joists
FIGURE 4: JOIST SPAN - FREE-STANDING DECK The maximum length of the overhang is equal to one-fourth of the joist span length (0.25 x joist span). For more information on Free-Standing Decks, see Sheet 14. Prescriptive Deck Details Sheet 4 of 22 Georgia Amendments-...
Page 5: Beams
Spans are based on 40 PSF live load, 10 PSF dead load, southern pine #2, normal loading duration, wet service conditions and deflections of Δ=ℓ/360 for main span and ℓ/180 for overhang with a 230 lb. point load. Prescriptive Deck Details Sheet 5 of 22...
Page 6: Deck Plan
2x______ rim joist < ______" round or square footing = ______ ______ ______ beam span = ______ overhang overhang W = ______ FIGURE 7: TYPICAL DECK FRAMING PLAN Prescriptive Deck Details Sheet 6 of 22 Georgia Amendments- 05/23/12...
Page 7: Joist-To-Beam Connection
FIGURE 10: PROHIBITED preservative containing copper naphthenate in accordance POST-TO-BEAM ATTACHMENT with AWPA M4. Such products can be found in the paint department of most hardware or home center stores. Prescriptive Deck Details Sheet 7 of 22 Georgia Amendments- 05/23/12...
Page 8: Footings
30" 12" The cast-in-place post base may require a footing thickness greater than the value in the table above. In such cases, the manufacturer's specified minimum footing thickness shall govern. Prescriptive Deck Details Sheet 8 of 22 Georgia Amendments- 05/23/12...
Page 9: Ledger Attachments
FIGURE 14. If a minimum 1" EWP or 2x band board is not present, then a free-standing deck is required. See Free-Standing Decks on Sheet 14 for more information. FIGURE 13: WOOD I-JOIST PROFILE Prescriptive Deck Details Sheet 9 of 22 Georgia Amendments- 05/23/12...
Page 10 FIGURE 14: ATTACHMENT OF LEDGER BOARD-TO-BAND BOARD FIGURE 15: NOT USED FIGURE 16: NOT USED Prescriptive Deck Details Sheet 10 of 22 Georgia Amendments- 05/23/12...
Page 11: Prohibited Ledger Attachments
Through-bolts shall have a minimum diameter of ". Pilot holes for through-bolts shall be " to " in diameter. Through-bolts must be equipped with washers at the bolt-head and nut. Prescriptive Deck Details Sheet 11 of 22 Georgia Amendments- 05/23/12...
Page 12: Framing At Chimney Or Bay Window
Only one type of diagonal bracing shall be provided in each beam line as identified in FIGURE 22 • and each joist line as identified in FIGURE 23. Connection of diagonal bracing shall be in accordance with FIGURE 24. • Prescriptive Deck Details Sheet 12 of 22 Georgia Amendments- 05/23/12...
Page 13 AT BOTTOM OF POST AT POST-BEAM CONNECTION AT JOIST OR BEAM FIGURE 24: TYPICAL CONNECTIONS OF DIAGONAL MEMBERS Prescriptive Deck Details Sheet 13 of 22 Georgia Amendments- 05/23/12...
Page 14: Free-Standing Decks
Only guard systems with a valid evaluation report from an accredited listing agency will be approved for installation. Prescriptive Deck Details Sheet 14 of 22 Georgia Amendments-...
Page 15: Guard Post Attachments
Hold-down anchors shall have an 1,800 lb. minimum capacity and shall be galvanized per the • requirements on Sheet 3. Guard posts may be attached to either side of the rim joist or outside joist. • Prescriptive Deck Details Sheet 15 of 22 Georgia Amendments- 05/23/12...
Page 16: Stair
Wood-plastic composites may not have capacity for stair treads equal to their wood equivalents. • Tread material shall be attached per FIGURE 35. • Risers may be framed with 1x lumber minimum or equivalent wood-plastic composite. • Prescriptive Deck Details Sheet 16 of 22 Georgia Amendments- 05/23/12...
Page 17 10" diameter or 8" square, 4" thick footing 12" below grade and be attached per FIGURE 12. Intermediate landings may also be provided to shorten the stringer span; see Stair Landings on • Sheet 18. FIGURE 33: STAIR STRINGER REQUIREMENTS Prescriptive Deck Details Sheet 17 of 22 Georgia Amendments- 05/23/12...
Page 18 However, for stair landings only, 4x4 posts may be used in lieu of 6x6 posts for heights less than or equal to 7'-0". Every landing shall have a minimum dimension of 36" measured in the direction of travel and not less than the width of the stairways served. Prescriptive Deck Details Sheet 18 of 22 Georgia Amendments-...
Page 19 10d nails top and bottom, each side triangular opening shall not permit the passage of a 6" diameter sphere FIGURE 36: STAIR GUARD REQUIREMENTS Prescriptive Deck Details Sheet 19 of 22 Georgia Amendments- 05/23/12...
Page 20 16" o.c. 2x blocking " min. " min. 34"-38" to nosing of stairs, typical wall guard corrosion-resistant post handrail hardware MOUNTED TO GUARD MOUNTED TO WALL FIGURE 38: HANDRAIL REQUIREMENTS Prescriptive Deck Details Sheet 20 of 22 Georgia Amendments- 05/23/12...
Page 21 Stair stringers at grade shall bear on a concrete footing as shown in FIGURE 40. The footings for each stringer may be combined and poured as a 12" deep slab. guard post stringer stringer 8" square or 10" round, 12" deep footing FIGURE 40: STAIR STRINGER FOOTING Prescriptive Deck Details Sheet 21 of 22 Georgia Amendments- 05/23/12...
Page 22: Safety Glazing
36" glass panes, partially or wholly, within this area adjacent stairs must be safety glazed walking surface of deck lower walking surface 60" FIGURE 42: SAFETY GLAZING AREA AT STAIRS Prescriptive Deck Details Sheet 22 of 22 Georgia Amendments- 05/23/12...
Page 23 Georgia State Amendments to the Prescriptive Deck Details (Based on the 2012 International Residential Code) Georgia Department of Community Affairs Community Development Division 60 Executive Park South, N.E. Atlanta, Georgia 30329-2231 (404) 679-3118 www.dca.ga.gov Revised January 1, 2015...
Page 24 (INTERNATIONAL RESIDENTIAL CODE FOR ONE- AND TWO-FAMILY DWELLINGS) PRESCRIPTIVE DECK DETAILS WITH GEORGIA AMENDMENTS *Revise the 2014 GA Prescriptive Deck Details based on the International Residential Code for One- and Two- Family Dwellings, 2012 Edition, as follows: COVER SHEET (Sheet 1 of 22) *Revise cover sheet to add the following statement in red lettering at the bottom of the page: This document is subject to updates and revisions.
Page 25 *Revise FIGURE 7: ‘TYPICAL DECK FRAMING PLAN’ to remove the word “screws” from the note 2x ____ledger board with bolts, screws, anchors @_______” on center as shown below: FIGURE 7: TYPICAL DECK FRAMING PLAN (Effective January 1, 2015) GA Prescriptive Deck Details Amendments 2015...
Page 26 • IRC Table R301.5 Footnote (c) requires a 300 lb. concentrated load check on stair treads. To comply, treads must be larger than No. 2, 2 x 6 lumber. Note: The implementation of these requirements shall be delayed until January 1, 2016. (Effective January 1, 2015) GA Prescriptive Deck Details Amendments 2015...
Page 27 *Revise FIGURE 33: ‘STAIR STRINGER REQUIREMENTS’ on Sheet 17 to read as follows: FIGURE 33: STAIR STRINGER REQUIREMENTS Note: The implementation of these requirements shall be delayed until January 1, 2016. (Effective January 1, 2015) End of Amendments. GA Prescriptive Deck Details Amendments 2015...