What is the minimum live load of a flat roof?

A typical roof is expected to support a live load of 20 psf; this minimum live load is in addition to the dead load that the roof must bear.

What is the live load on a roof?

The weight of temporary objects on the roof is referred to as the live load. Live loads include the roofing crew and the equipment and tools they bring with them. A roof must be able to support both its dead load and live load at any given time.

What is the minimum live load for residential building?

The minimum live loads per square meter area for different types of structures are given in IS 875 (Part-2)-1987. IS 875 (Part-II)-1987 specifies the live loads for following occupancy conditions: Residential Buildings- dwelling houses, hotels, hostels, boiler rooms and plant rooms, garages etc. Educational buildings.

What’s the difference between roof live load and floor live load?

IBC 2012 defines live load (L) as “roof live load greater than 20 psf and floor live load”. Roof live load (L r) is defined as “roof live load of 20 psf or less”. So with the roof dance floor example, per IBC, the live load would not be roof live load, but live load, assuming the live load magnitude exceeded 20 psf.

What is the standard parking live load ( PSF )?

Many studies have gone into this, and 40 PSF tends to be as hight as it gets for normal use car parking. When you have trucks and such, things get a bit heavier. I would think there is also a point load to check for, but I’m not sure off the top of my head. 40 psf is the US standard, per ASCE. Wheel load is 3000 lbs over a 4.5inx4.5in area.

What is required FB for 30 psf live load?

In the example, the joists have a spacing of 16 inches and a span of 11 feet, 2 inches. The span table for a 30 psf live load/10psf dead load floor indicates a required Fb value of 1,315 and a minimum E value of 1,800,000.

What should the span table be for 30 psf live load?

The span table for a 30 psf live load/10psf dead load floor indicates a required Fb value of 1,315 and a minimum E value of 1,800,000. In this case, your joists are adequate to support a 30 psf live load and 10 psf dead load. Use span tables for progressively heavier loads until you find the limits of your floor.

What should the live load be on a floor?

You asked about determing the loads. Usually the design live load on a floor will be either 30 pounds per square foot or 40 lbs per square foot. These are arbitrary numbers that are simply set as a standard in the building code.

In the example, the joists have a spacing of 16 inches and a span of 11 feet, 2 inches. The span table for a 30 psf live load/10psf dead load floor indicates a required Fb value of 1,315 and a minimum E value of 1,800,000.

The span table for a 30 psf live load/10psf dead load floor indicates a required Fb value of 1,315 and a minimum E value of 1,800,000. In this case, your joists are adequate to support a 30 psf live load and 10 psf dead load. Use span tables for progressively heavier loads until you find the limits of your floor.

What is the floor rating 120psf, I do not understand?

More information on the actual floor structure is needed to help you. As to the 20 psi figure, this translates to a live load value of 288 psf. In that the design load was apparently for 120 psf (normally 100 live plus 20 dead), what is the reason for the nearly 300 psf requirement if I understand you correctly?