Floor Load Deflection Calculation

So these are the limits set by the code.

Floor load deflection calculation.

Two different types can be applied in the calculator. As a result the live load dead load and distribution of forces are different. To generate the worst case deflection scenario we consider the applied load as a point load f at the end of the beam and the resulting deflection can be calculated as. The code section on working load deflection states.

Chapter 3 of the international residential code irc provides the maximum allowable deflection for a given structural member floor roof wall etc. The deflection calculator provides several engineering specifications such as the moment of inertia and yield strength to determine deflection. L 240 for unplastered floor construction. Distributed loads are specified in units of force per unit length kn m or plf along the beam and can be applied between any two points.

If there s wall board covered ceiling suspended from the underside of that floor the dead load increases to about 10 pounds per square foot. The deflection of floor and roof assemblies shall not be greater than l 360 for plastered construction. Uniform loads have a constant magnitude along the length of application. The dead load on a floor is determined by the materials used in the floor s construction.

A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. Q force per unit length n m lbf in l unsupported length m in e modulus of elasticity n m 2 lbf in 2. This house is identical to our first example except it is stick built. Loads should be determined in accordance with this chapter.

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. I planar moment of inertia m 4 in 4. Therefore the start and end magnitudes specified by the user must be the same. If you have engineered truss or i beam type joists please do not use this calculator.

The formulas in this calculator only focus on either the downward or upward. Whether there will be one fixed end two fixed ends or the load will be supported on both ends. This calculator is designed to work with dimensional lumber only. You also have options depending on the expected configuration of your solution.

It is important to list live load dead load and total load separately because live load is used to compute stiffness and total load is used to calculate strength. Typically for better performing floors minimal defection is desired. Downward loads tend to deflect the beam downwards. Loads can be in the form of a single point load linear pressure or moment load.

This deflection is calculated as. Loads on the other hand affect the beam s deflection in two ways. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. The direction of the deflection and the magnitude of the deflection.