3 Floor Building Beam Size Examples

This is step 5 from tim s deck design explanation.

3 floor building beam size examples.

Choose the row for the size of lumber used in the double header. 3 5m a steel beam 178 x 102 x 19 ub s275 3m long was selected. Use 2 6 in this example. The center beam carries half of the floor load the partition load and half of the second floor load.

In fact 3 story building can be made without rcc columns as load bearing building with 23cm thick wall. From the question it is apparent that the information seeker is asking for a plotted bldg of area upto 300 sq yards with a 3 story construction. Aitc beam capacity tables. Area of the cross section is specific to the beam section selected and is defaulted to the values.

Live and dead loads are given in the building code. Length of beam is the total including all spans of the beam in mm or ft. These tables are provided as a guideline. Tim garrison the mind behind all the constructioncalc software was kind enough to provide the following explanation how to design the beam size for this hot tub deck.

Portion of the building storey no. For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side. These nine beam spans are for built up beams made up of either 2x8 2x10 or 2x12 dimensional lumber nailed together as either 3 4 or 5 ply beams. Pick the span you want pick 4 0 for example select the fb column of the lumber you intend to use in af pa design values for joists and rafters 2 hem fir fb 1104 psi e 1 300 000 psi so use span table column fb 1100.

I m building a ground level deck maximum 24 inches above the ground it s l shaped and it ll have two long beams. Young s modulus is set to a default value of 200 000 mpa or 29000 ksi for structural steel but can be edited by the user. For the example building the storey numbers are defined as follows. The properties of the beam and section are specified by typing directly into the input fields.

Foundation top ground floor 1 ground beams first floor 2 first floor second floor 3 second floor third floor 4 third floor fourth floor 5 fourth floor fifth floor 6. One is 27 and a half feet the other one is 31 feet. The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected. The beams will be three ply pressure treated sp number two 2 by 12s using 12 foot long lumber cut to fit the distances between the supporting posts.

0 6kn m2 width of load perpendicular to beam or height of load supported by beam. The calculator produced a report suitable for building regulation approval which shows the bending shear and deflection for the beam are all within safe limits. Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. Determine the total load per foot of beam.

Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties. B first floor girder conditions.