For the most part live load and dead load values for floor and roof systems are considered distributed loads.
Floor live load explained.
Floors must be able to support two different kinds of weight loads.
Allowable total load is therefore 173 psf.
Equivalent open aisle live load is 200lbs 3ft.
3 ft 10 ft 100 lbs sq ft.
Live load is the lesser of the load for l 360 and total load as determined above minus dead load.
For residential floors the live load is usually considered to be 30 to 40 pounds per square foot psf although this varies depending on the location within the home.
To determine the minimum design values for strength live and dead loads are added together.
Roof and floor live loads are produced during maintenance by workers equipment and materials and during the life of the structure by movable objects such as planters and people.
Bridge live loads are produced by vehicles traveling over the deck of the bridge.
In other words the weight is distributed or shared uniformly by the members in the floor or roof system.
Strength and stiffness are equally important.
The house acts as a structural system resisting dead loads weight of materials live loads weights imposed by use and occupancy like snow loads and wind loads.
Live loads are imposed on the building and are temporary and dynamic such as the weight of occupants furniture or anything else that can be moved.
The term live load refers to the total load carried by the floor including furnishing occupants and other objects being stored.
For example if the walking surface were 3 feet wide and 10 feet long the total live load on the walkway would be.
The live loading of 100 pounds per square foot means that the entire walking surface is assumed to be loaded this amount.
We measure uniform live loads as pounds per square foot psf.
When considering an open aisle within the cmfs a realistic live load for this aisle is to place a 200 pound person in front of each shelving cabinet i e.
Allowable total load for floors is the least of load capacities for l 240 bending and shear.
The dead load on the floor is the weight of the floor structure itself and anything else that is permanently attached to the floor.
