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https://www.decks.com/how-to/40/beam-span-chart-table
When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. Dimensional Lumber Deck Beam Span Chart . The numbers in gray indicate the distance between the support posts.
https://www.shopyourway.com/questions/1005861
What is the maximum span for 2x8 joists? Report This by Manage My Life. April 26th, 2007. ... without support, the wall between the firstand the second floor is helping to spread the load of the second floor joistsdown to the first floor joists. The wall is acting as a pseudo …
https://awc.org/codes-standards/calculators-software/spancalc
Publications Calculators & Software Building Codes Fire Safety Span Tables Decks Weights and Measurement Codes & Standards > Calculators & Software >
https://www.decks.com/how-to/41/deck-joist-sizing-and-spacing
Deck Joist Sizing and Spacing. ... In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. The larger the deck, the larger the joists.
https://www.engineeringtoolbox.com/floor-joists-span-d_1479.html
Maximum floor joist span for No. 1 and No. 2 Grade of Douglas fir are indicated below. Max. dead load (weight of structure and fixed loads) 10 lbs/ft 2. Live load is weight of furniture, wind, snow and more.. 1 psf (lb f /ft 2) = 47.88 N/m 2; 1 ft = 0.3048 m
https://www.bhg.com/home-improvement/deck/building/how-to-compute-deck-spans/
Building a deck? Then you'll need to know how to compute the spans. Find tips and information on lumber types, decking, standard lengths, and more.
https://diy.stackexchange.com/questions/82822/can-i-use-a-2x8-for-a-ceiling-joist-and-rafters-on-a-16-span
My guess is that I would use 2x8's for the rafter ties/ceiling joist, and also 2x8's for the rafters. There would be interior framing inside the addition, but there would be an area of about 15 x 16 that would be clear. The pitch of the roof would be about a 4 pitch. Edit: Thanks for the responses, Yes the ridge will be centered on the 16' span.
https://www.engineeringtoolbox.com/horizontal-roof-rafter-span-d_1484.html
Horizontal Roof Rafters - Maximum Span Douglas Fir in horizontal roof rafters and maximum span . Sponsored Links . Douglas fir maximum horizontal roof rafter span for Lumber Grade Selected Structural and No. 1 and No. 2, are indicated below. Max. dead load (weight of structure and fixed loads) 15 lbs/ft 2.
https://www.hunker.com/12003188/how-far-can-you-span-a-2x10-floor-joist
Joists that are closer together can support more weight, which allows the joists to span a longer distance than joists spaced further apart. The maximum span distance for 12-inch spacing is greater by as much as 30 percent compared to 24-inch spacing. Spacing is measured from the center of one joist to the center of the next.
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