House Floor Design Load
Camila Farah
D estimated mean dead weight of the construction.
For especially heavy loads it is recommended to have a structural engineer research the floor framing. Foot ceiling construction gypsum sheetrock finish 10psf floor construction carpet or vinyl 10 psf hardwood floor 12 psf ceramic tile 15 psf. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. 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.
D 0 6w or 0 7e when h loads are present they shall have 6a. 0 6d 0 6w effect or 0 6 when resisting the load when 8. For example a floor joist at 16 spacing s that can carry 53 pounds per linear foot would translate into a 318 pound single point load at its center. Location and configuration of heavy loads should be looked at on a case by case basis.
Lr maximum roof live load anticipated. For example historically uk office buildings have been designed and marketed with live loadings of 3 5 4 0 kn m2 however this may be an over provision. 2 5 kn m2 for floors above ground floor and 3 0 kn m2 at or below ground floor over may be more appropriate with 7 5 kn m2 over 5 of the floor area to allow for future flexibility. First floor live loads have higher requirements than second floor live loads 40 pounds per square foot vs.
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Load and resistance factor design lrfd. These loads vary in magnitude position and duration but the building codes also require a designated live load be applied to every square foot of floor system. 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. Heavier flooring materials increase the dead load even more.
L design floor live load. D 0 75l 0 75 0 6w 0 75 l r or s or r a load factor of 1 0 when adding to load 6b. D 0 75l 0 75 0 7e 0 75s 7.
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