Calculate Size Steel Beam Needed For Bridge

Use a calculator to multiply the clear span by the length of the floor joist by the vertical load.

Calculate size steel beam needed for bridge.

Once you have chosen the right shape of beam select its dimensions depth width and weight from the dropdown menu. The formula for the section modulus is beam width times beam depth squared divided by 6. Staggered pattern with at least a 3 x 120 nail. Beams of more than one ply must be fastened together with either nails or bolts.

You have a choice of w beams s beams or american standard channels. We have learned from our experience to use at least a 3 1 4 x 131 groove shank nail in a column of four every foot apart down the laminate. Choose an approximate size of steel i beam from a standard i beam table. 1 1 enter the steel beam span length enter the length of the steel beam.

To calculate properties of girder such as area moment of inertia geometric center and section modulus for both steel wide flange girder section and composite section with concrete deck. Draw bending moment diagram for the given loads and you will find the value of maximum bending moments say m that the steel i beam is expected to experience. 2 load details you need to know what type of load your beam will be supporting. If you re not sure what beam size to use just allow the steel beam calculator to select the beam size for you.

Divide the result by 1000 to get the figure in kips a non si unit of force equal to 1 000 pounds force and understand that 1 kip is equal to 4448 222 newtons. Calculate the section modulus for the different beams which you could use. A two 2 by 6 standard beam has actual dimensions of 1 5 by 5 5 inches which would give a section modulus of 1 5 x 5 5 x 5 5 6 7 6 which is not enough for this example.