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PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 7 <br /> Table 3B. Glued Laminated Timber Beam Spans (L8)1 for Joists Framing from One Side Only. <br /> Joist Spans(L) Less Than or Equal to: <br /> Stress Class2 Width3 Depth4 6' 8' 10' 12' 14' 16' 18' <br /> 9-1/2" 12'-2" 10'-6" 9'-4" 8'-6" 7'-10" 7'-4" 6'-11" <br /> Balanced or <br /> 3-1/2" 11-7/8" 151-2" 13'-1" 111-8" 101-8" 9'-10" 9'-2" 8'-8" <br /> Unbalanced 20F-1.5E • 14" 171-10" 15'-5" 13'-9" 12'-7" 111-7" 10'-10" 101-2" <br /> And Higher Grade 11-7/8" 18'-0ii5 161-8" 141-10" 13'-7" 121-6" 111-8" 11'-0" <br /> Cedar 5-1/4" 14" 18'-0"5 18'-0"5 171-6" 151-11" 141-9" 131.9" 131-0" <br /> 16" 18'-0i5 18'-0"5 18'-0"5 1.8'-0i5 16'-10" 151-9" 141-10" <br /> 9-1/2" 13'-11" 12'-1" 10'-9" 9'-10" 9'-1" 8'-6" 81-0" <br /> 3-1/2" 11-7/8" 17'-5" 151-1" 131-5" 121-3" 111-4" 101-7" 101-0" <br /> Unbalanced 24F-1.8E 14" 18'-0i5 171-9" 15'-10" 141-5" 13'-4" 121-6" 111- 9" <br /> Douglas Fir-Larch or <br /> Southern Pine 11-7/8" 181-0"5 18'-0"5 171-1" 151-7" 141-5" 131-6" 121-8" <br /> 5-1/4" 14" 18'-0"5 18'-0i5 18'-0"5 18'-0i5 171-0" 151-10" 141-11" <br /> 16" 181-0i5 18'-0i5 18'-0"5 18'-0"5 18'-0"5 18'-0i5 171-0" <br /> 9-1/2" 13`-11" 12'_7" 111-8" 111-0" 101-5" 91-11" <br /> 3-1/2" 11-7/8" 17'-5" 15-10" 141-8" 13'-9" 131-1" 121-6" 12'-0 <br /> Balanced 24F-1.8E 14" 181-0"5 18'-0i5 17'-4" 16'-3" .151-5" 141-9" 141-2" <br /> Douglas Fir-Larch <br /> or 11-7/8" 18'-0"s f8'-0"5 171-4" 161-3" 151-5" 14'-9" 141-2" <br /> Southern Pine <br /> 5-1/4" 14" 18'-0"s 1$t-0"s 18-0s 18-01s 1$i-0I5 171-61 161-91 <br /> 16" 18'-0"5 18'-0 181-0" 181-0" 1 8'-0"5 18'-0"5 18,-01E5 <br /> 1.Assumes 40 psf live load, 10 psf dead load, L/360 simple span beam deflection limit,cantilever length/180 deflection limit.Glued laminated <br /> timber shall be naturally durable or preservative treated with an oil-borne treatment in accordance with AWPA U1.See MINIMUM <br /> REQUIREMENTS&LIMITATIONS. <br /> 2. Preservative treated structural composite lumber of equal or greater capacity can be substituted. <br /> 3. Beam widths of 3-1/8"or wider can be used for the tabulated 3-1/2"width,and beam widths of 5-1/8"or wider can be used for the tabulated <br /> 5-1/4"width. <br /> 4. Beam depth must be equal to or greater than joist depth if foist hangers are used(see Figure 6,Option 3). <br /> 5. Beam span prescriptively limited to 18'-0"for footing design\ <br /> Figure 3. Beam Span. <br /> joists'above optional overhat a(n*y <br /> ?beer-at each end); <br /> [ ps}} q(p� ° _ <br /> ( (� <br /> ll_ lj N 1/11 13' <br /> t - , � <br /> boom attt sp <br /> interior post <br /> post tom locations <br /> LEA"_ . boarnspanito beam.span(18): 1L14; <br /> O erhang See Table 3 See Table.3 ove ena <br /> 167R <br /> (L_ V-e/r N'Cit/11 <br /> /1 <br /> /4•// <br /> COT- 140/1-1_,L American Wood Council <br />