This is step 5 from tim s deck design explanation.
3 floor building beam size examples.
For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side.
Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties.
0 6kn m2 width of load perpendicular to beam or height of load supported by beam.
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.
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.
Live and dead loads are given in the building code.
Use 2 6 in this example.
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.
In this example we used the constructioncalc wood beam calculator to make the calculations for us so our deck doesn t collapse.
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.
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.
Area of the cross section is specific to the beam section selected and is defaulted to the values.
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.
I m building a ground level deck maximum 24 inches above the ground it s l shaped and it ll have two long beams.
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.
Length of beam is the total including all spans of the beam in mm or ft.
Choose the row for the size of lumber used in the double header.
Determine the total load per foot of beam.
3 5m a steel beam 178 x 102 x 19 ub s275 3m long was selected.
Portion of the building storey no.
Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.
B first floor girder conditions.
The weight of the partition is listed in the architectural graphic standards as 10 pounds per square foot.
Building between two successive grids of beams.
For the example building the storey numbers are defined as follows.
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.
In fact 3 story building can be made without rcc columns as load bearing building with 23cm thick wall.
The center beam carries half of the floor load the partition load and half of the second floor load.
