The answer to this question depends upon several criteria: 1. The span of the floor framing members 2. The 'on center' spacing of the floor framing members 3. The nominal dimension of the floor framing members (2x12 etc.) 4. The grade and species of the wood 5. Size and location of any holes or notches in the framing members A typical residential floor designed for a 10 psf Dead Load, 40 psf Live Load and a deflection criteria of L/360 (mid span deflection limited to L in inches/360): 2x12 joists at 16" on center spacing, Spruce-Pine-Fir #2, will have an allowable max span of 17'-10". 2x12 joists at 16" on center spacing, Southern Pine #2, will have an allowable max span of 18'-10". 2x10 joists at 16" on center spacing, Spruce-Pine-Fir #2, will have an allowable max span of 15'-5". Random thoughts: Thinset ceramic tile with mortar will add about 10 psf dead laod. Location of very heavy objects can be critical when determining a floors capacity.
A span is 8" or 0.67 foot. That is an informal measurement from the tip of the thumb to the tip of the pinkie on a average spread hand.
hand,foot,span,cubit,kernels of corn,
That really cannot be answered without looking at the entire set of plans.
Depends upon your personal "stride" ... the span of distance between each foot when walking normally.
no
That depends on the anticipated weight and the span.
Even using a 2x12 the spacing for 20 feet will be less than 12 inches on center. I would recommend splitting the distance with a double beam perpendicular to the joist run. This will allow you to go up to 24 inches on center. Your span will only be ten feet aproximately this way. I would double the beam. (2-2x12 joined together) Good luck. when building your beam make sure the laps on the beam are at least 6 foot apart and put a good wood glue on the 2x12s plus for added strength put 1/2 inch O.S.B. in between the 2x12 and I would also lag or bolt them together, at about 16 to 24 inches O.S.B. = Oscilating Strand Board.
About 5metres(16') but would have to be stress graded timber.
1 ft by 1.2 ft... verticaly 1.2ft
hand span, arm span, foot, cubit
Not sure why you need a beam that bears no load. You can go 22'. Beyond that it needs to be broken down to shorter lengths.
A foot span is a term used in the roofing industry to calculate the area of a roof. It is necessary to calculate how many shingles per foot. This measurement will vary depending on the type of shingles used.
Triple? That sounds an awful lot like gluelam... Which requires engineer approval to meet code. The inspecting engineer will be able to tell you.
A span is not a standard measure, a foot is. So there is no definitive answer.
You really need to consult a structural engineer as I have no i dea what the load above or adjacent to this structure might be.
Tell us the size of the span, and what it is made from, and we may be able to get you an estimate. A single 6 foot board is 5 seconds, a 300 foot long concrete and steel span takes a little longer.