Calculate Size Steel Beam Needed For Bridge

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.

Calculate size steel beam needed for bridge.

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. Calculate the section modulus for the different beams which you could use. Beams of more than one ply must be fastened together with either nails or bolts.

Once you have chosen the right shape of beam select its dimensions depth width and weight from the dropdown menu. 2 load details you need to know what type of load your beam will be supporting. Staggered pattern with at least a 3 x 120 nail. You have a choice of w beams s beams or american standard channels.

The 2012 irc code calls for a minimum of a 32 o c. 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. 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. 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.

1 2 select steel beam size select the steel beam size from the dropdown list. The formula for the section modulus is beam width times beam depth squared divided by 6. The first input you need is the steel i beam load specifications or loading details on the steel i beam.