How far will a 4×12 beam span? 
A 4×12 beam is a piece of steel that can support up to 1200 pounds. How far will this beam span when it is used for supporting weight? The answer depends on the size of the bolt and its material composition, but 3 feet would be an average estimate.
The “how far can a 4×12 span without support” is a question that has been asked many times. The answer to this question depends on the beam size, material strength and how much weight it will be supporting.
Spans of Joists  

Douglas FirLarch, HemFir, SprucePineFir, Redwood, Cedars, Ponderosa Pine, Red Pine, Ponderosa Pine, Ponderosa Pine, Ponderosa Pine, Ponderosa Pine, Ponderosa Pine, Ponderosa Pine, Ponderosa Pine, Pond  4X10  5′10″ 
4X12  6′9″  
32X6  4′6″  
32X8  5′9″ 
How long can a 4×12 span stretch in this manner?
The longer the beam’s spread between posts, the greater the distance it can traverse. Between supporting posts, a Redwood 4×6 beam should not span more than 6′.
What kind of wood can stretch 20 feet? 60 lbs/ft2 (2873 N/m2) maximum live load
Maximum Length (ft – in)  

Nominal Dimensions (inches)  Center to Center Joist Spacing (inches)  Grade of Lumber 
2 x 12  24  13′ – 2″ 
2 x 14  12  20′ – 10″ 
16  18′ – 0″ 
Also, what is the Maximum Length of a 6×10 beam?
The loading condition is 40 pounds per square foot live and 10 pounds per square foot dead.
Minimum Solid Beam Sizes – 40 psf Live, 10 psf Dead Pressure Treated H/fir #2 or better (group x Douglas Fir & S. Pine)  

Span of Joists  In feet, there is a space between the posts.  
11 ft  4×6  4×8 
12 ft  4×8  4×8 
13 ft  6×10  6×10 
How can you figure out the length of a beam?
The section modulus is calculated by dividing the beam width by the beam depth squared by 6. The actual dimensions of two 2by6 standard beams are 1.5by5.5 inches, giving a section modulus of 1.5 x 5.5 x 5.5 / 6 = 7.6, which is insufficient for this case. It would be sufficient to use a 2by8 beam.
Answers to Related Questions
How far may a beam stretch before it has to be supported?
A double ply beam may span in feet a value equal to its depth in inches when supporting joists that span 12 feet with no overhang beyond the beam. A double 2×12 beam may span 12 feet, while a (2) 2×10 beam can span 10 feet, and so on.
What is the maximum weight that a 2×8 can support?
Some of it is rather technical, and it largely concerns pounds per square foot of loading. 2x6s are often utilized for ceiling joists, especially because you said 24 inches “only oc and very short spans (5 or 6 feet ). Most floor loads would be at least 2×8 @ 16 inches “oc and, if possible, 2×10.
How much horizontal weight can a 4×4 beam support?
In general, a 24 wooden beam can sustain up to a ton of weight horizontally, hence a 44 wooden beam can easily support double the weight listed above horizontally.
How much weight can a 2×12 horizontally support?
About 180 lbs. per foot, or 2,100 lbs., may be supported by a single 2×12.
For a 15foot span, what size beam do I need?
Because it can span 15 feet and 10 inches, a 2×12 with an E of 800,000 psi and a Fb of 790 psi also works. Determine which size timber will work given a design span of 15 feet 1 inch and a joist spacing of 16 inches.
What is the Maximum Length that a 2×8 beam can span without support?
In general, 16inchoncenter joists may reach 1.5 times their depth in inches in feet. A 2×8 may be up to 12 feet long, a 2×10 can be up to 15 feet long, and a 2×12 can be up to 18 feet long. The joists become bigger as the deck gets bigger.
What is the Maximum Length of a triple 2×12 beam?
for a triple 2×12 of 14 feet
What is the maximum weight that a 2×10 floor can support?
In fact, each 2×10 can hold up to 1,200 pounds. To be explicit, “clear spans” are used to quantify spans. To put it another way, from one face of support to the next. Also, if your BBQ is in the center of the span such that people can stand around it, the joists will be subjected to an extra “Live Load.”
Is it possible to utilize a 6×6 as a beam?
To answer your question, no, a 6X6 will not be able to hold that span, even if it is merely a roof. The strength of the beam comes from its height rather than its breadth.
How do you determine the size of a header beam?
How to Size Headers & Beams
 Choose a sort of wood depending on the amount of weight you’ll be carrying.
 To calculate the total load per foot per beam, use a span table.
 Choose the correct span from the options in the table.
 To view the capacity listing, scroll down the column of the lumber you’ve chosen.
 Double your beams for more planning and construction help.
What is a 2×8 header’s Maximum Length?
Figure B: Example of Size of the Header Calculation
Size of the Header  Maximum Length  Count of Trimmers 

26% double  4’0″ x 0’0″ x 0’0″ x 0’0″ x  One 
28% double  0 in. x 5 ft.  Two 
Double 2 ten  6′ 2″””””””””””  Two 
212 double  7 ft. 1 in. x 7 ft. 1 in. x 7 ft.  Two 
Is it possible for me to span a double 2×8?
No, even doubled, standard timber cannot reach 23 feet. If you can locate such lengths, it’ll be as bouncy as a trampoline and won’t meet code. To cover that distance, you’ll need at least a 12″ (nominal) Ijoist or an engineered floor truss, or an LVL or steel beam in the middle.
What is the maximum weight that a beam bridge can support?
What is the maximum weight that a typical beam bridge can support? The HS20–44 load is the load used to design most current highway bridges in the United States. This is a 72,000pound truck cargo.
What is the beam’s depth?
The effective depth of a beam is the total depth minus the effective reinforcing cover. The effective cover is calculated by measuring the distance between the center of tension reinforcement and the edge of the beam’s maximum tensile stress.
To span 20 feet, how large of a beam do I need?
Size of 20foot clearspan beam
To span the 20′, you’ll need something like a 1216″ GLULAM or LVL, and you can use ordinary 2×810 dimensional timber 16″OC as floor joists.
What is the maximum span of a 6×12 beam?
The loading condition is 40 pounds per square foot live and 10 pounds per square foot dead.
Minimum Solid Beam Sizes – 40 psf Live, 10 psf Dead Pressure Treated H/fir #2 or better (group x Douglas Fir & S. Pine)  

Span of Joists  In feet, there is a space between the posts.  
11 ft  4×6  4×10 
12 ft  4×8  4×10 
13 ft  6×10  6×12 
To span 10 feet, what size beam do I need?
A double ply beam may span in feet a value equal to its depth in inches when supporting joists that span 12 feet with no overhang beyond the beam. A double 2×12 beam may span 12 feet, while a (2) 2×10 beam can span 10 feet, and so on.

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