# What is the tributary area?

## What is the tributary area?

The tributary area is a loaded area that contributes to the load on the. member supporting that area, ex. the area from the center between two beams to the center of the next two beams for the full span is the load on the center beam. It can also be called the load periphery.

## How do you calculate wind load?

Armed with pressure and drag data, you can find the wind load using the following formula: force = area x pressure x Cd. Using the example of a flat section of a structure, the area – or length x width – can be set to 1 square foot, resulting in a wind load of 1 x 25.6 x 2 = 51.2 psf for a 100-mph wind.

How are wind loads calculated for a wall?

Component and cladding wind loads are calculated separately for each individual component based on that component’s exposed wind area. So if you are designing a wall, you would use the tributary area of that wall to determine a wind pressure and then design the wall with that.