U need to look at the local building code for your states required code for structural support/load barring construction... Most states building departments have a on line code book that can be referenced for the info... Some states require steel some wood, and some states have snow and some don't, so there are many variables that may need to be considered other then a generic equation for load barring structures... Good luck!What is a simple mathematical equation to figure out how big a beam must be for supporting a one story house?
if it is a concrete structure the beam may be Concrete. If it is a composite structure it may be either steel or concrete. The beam size and span will depend on the structural layout and loading. Hence first thing is to have a look at on the architectural layout and then to make necessary beams columns layout. There are thumb rules to decide the size of the beam. for example you can take depth of the beam as 1/26th of span as a trial and widely used width is 225. But we have to calculate steel reinforcement area based on End and Mid Bending moment values. This does not tell whole story of design of a concrete beam. You have to see local code of practice. ACI 318 or BS 8110 or else.( in steel beam scenario it is BS 5950 or other steel code)
not sure about exact eqaution, but google the stress equation for engineering. Measrues physical stress on structures
you need to first understand where the beam must be placed, and how much load the walls will be lifting themselves. it's first year engineering statics.
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