05/23/12 Georgia Amendments- Prescriptive Deck Details Sheet 5 of 22
TABLE 1: MAXIMUM JOIST SPAN LENGTH
1
Joists without Overhangs
2x8 13'-8" 12'-5" 10'-2"
2x10 17'-5" 15'-10" 13'-1"
2x12 18'-0" 18'-0" 15'-5"
Joists with Overhangs
2x8 10'-6" 10'-6" 10'-2"
2x10 15'-2" 15'-2" 13'-1"
2x12 18'-0" 18'-0" 15'-5"
1
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.
BEAMS
Beams shall be designed and assembled in accordance with the requirements below.
• As shown in FIGURE 5, beam span is measured between the centerlines of two adjacent posts.
• Beam size is determined using TABLE 2.
• Beams may overhang each end up to one-fourth of the beam span (0.25 x beam span) as shown in
FIGURE 5.
• Using the members identified in TABLE 2, beams shall be assembled in accordance with FIGURE 6.
• Beam splices shall be located over interior post locations only.
joists above
post, typical
beam
beam splices at interior
post locations only
beam span beam span
optional
overhang
1
optional
overhang
1
FIGURE 5: BEAM SPAN TYPES
1
The maximum length of the overhang is equal to one-fourth of the beam span length (0.25 x beam span).
TABLE 2: MAXIMUM BEAM SPAN LENGTH
1
≤ 6' 7'-1" 9'-2" 11'-10" 13'-11" 8'-7" 11'-4" 14'-5" 17'-5"
> 6' - 8' 6'-2" 7'-11" 10'-3" 12'-0" 7'-8" 9'-11" 12'-10" 15'-1"
> 8' - 10' 5'-6" 7'-1" 9'-2" 10'-9" 6'-11" 8'-11" 11'-6" 13'-6"
> 10' - 12' 5'-0" 6'-6" 8'-5" 9'-10" 6'-3" 8'-1" 10'-6" 12'-4"
> 12' - 14' 4'-8" 6'-0" 7'-9" 9'-1" 5'-10" 7'-6" 9'-9" 11'-5"
> 14' - 16' 4'-4" 5'-7" 7'-3" 8'-6" 5'-5" 7'-0" 9'-1" 10'-8"
> 16' - 18' 4'-1" 5'-3" 6'-10" 8'-0" 5'-2" 6'-7" 8'-7" 10'-1"
1
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.
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