Structural Floor Loading Span Calculator

Span tables below illustrate common combinations of the multiple variables available.

Structural floor loading span calculator. The column on the left of each chart labeled beam span represents the beam length with bearing required for your project. Click on the appropriate beam this will take you to the calculation table for your project. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing. Dead load weight of structure and fixed loads 10 lbs ft2.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Armed with this information you can determine the minimum size span or strength of the beam credit julio. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Next use the buttons to select the supported length for the beam.

Span calculator for wood joists and rafters also available for the android os. Engineered wood components are sized using span tables that match various spans to pounds per foot of beam. Its either going to an exterior or an interior load. 2 grade of douglas fir are indicated below.

Geometry loading spacing bearing conditions etc. To use the beam span calculator below first select the number of floors that the floor beam will be supporting from the drop down list. In other words it is either going to be on an outside wall or somewhere on the inside. Understanding loads on beams.

Maximum floor joist span for no. For sawn lumber you must perform mathematical calculations. Roof rafter framing of the residential structural design tutorial. The calculator supports a variety of different loading types which can be applied in combination.

The sign convention used for loading is positive values shown. Each load can be named by the user. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000. There are two different types of loads.

Determine the beam header span length and the span carried supported by the beam header. 1 psf lbf ft2 47 88 n m2. Distributed loads are specified in units of force per unit length kn m or plf along the beam and can be applied between any two points. Live load is weight of furniture wind snow and more.

Use span tables for progressively heavier loads until you find the limits of your floor. Floor truss span chart each individual floor truss design is unique based on multiple variables. The load on an outside wall with clear span trusses is exactly half the load on each wall.