Homes are required by International Residential Building Code (IRC) to be built to a design wind speed of 90 mph, using Allowable Stress Design; or 115 mph, using Load Resistant Factor Design. Both of these wind speeds are based upon 3-second wind gusts.

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.

What is design wind load?

As the wind blows against a building, the resulting force acting on the elevations is called the ‘wind load’. The building’s structural design must absorb wind forces safely and efficiently and transfer them to the foundations in order to avoid structural collapse.

What is design wind pressure?

The design wind pressure shall be calculated as P = q G Cp – qi (GCpi) (lb/ft2) (N/m2) (27.4-1) where: q = qz for windward walls evaluated at height z above ground. q = qh for Leeward walls, sidewalls, and roof evaluated at mean roof height h above the ground.

What is the minimum required roof design load?

Roofs used for roof gardens or assembly purposes shall be designed for a minimum live load of 100 psf (4.79 kN/m²). Roofs used for other special purposes shall be designed for appropriate loads, as directed or approved by the commissioner.

Is wind load a live load?

Live loads are those loads produced by the use and occupancy of a building or structure and do not include construction loads, environmental loads (such as wind loads, snow loads, rain loads, earthquake loads and flood loads) or dead loads (see the definition of “Live Load” in IBC 202).

What is the basic wind speed?

Per definition by ASCE 7-16 & ASCE 7-10, Section 26.2 is defined as: BASIC WIND SPEED (V): Three-second gust speed at 33ft above the ground in Exposure C (see Exposure Categories) as determined in accordance with ASCE 7-16 (10) Section 26.5. 1. The wind shall be assumed to come from any horizontal direction.

Is code 875 Part 3 wind load?

This Code provides information on wind effects for buildings and structures, and their components. Structures such as chimneys, cooling towers, transmission line towers and bridges are outside the scope of this Code. There are Indian Standards dealing with chimneys and cooling towers separately.

What are live loads in construction?

Live loads refer to the transient forces that move through a building or act on any of its structural elements. They include the possible or expected weight of people, furniture, appliances, cars and other vehicles, and equipment.

Is 875 wind speed map?

THE wind speed map included in the IS:875 (Part-3)1, serves the primary purpose of choosing the appropriate basic wind velocity for the design of buildings and struc- tures. The cur- rently used design wind speeds are based on their return period at different locations.

How do you calculate basic wind speed?

Calculate wind pressure. Wind pressure is given by the equation P = 0.00256 x V², where V is the speed of the wind in miles per hour (mph). The unit for wind pressure is pounds per square foot (psf). For example, if the wind speed is 70 mph, the wind pressure is 0.00256 x 70² = 12.5 psf.

What is a typical residential floor live load?

U.S. building codes specify a uniform live load of 40 pounds per square foot (psf) for most residential floor designs. This load is intended to account for the large number of loads that can occur in a residence.

What are examples of live loads?

Typical live loads may include; people, the action of wind on an elevation, furniture, vehicles, the weight of the books in a library and so on. A live load can be expressed either as a uniformly distributed load (UDL) or as one acting on a concentrated area (point load).

What is considered a roof live load?

The live load on a roof is the weight of any temporary objects on the 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.