The Roof Deck Of The Single Story Building Is Subjected To A Dead Plus Live Load

Using the tributary approach and without taking any reductions find the following.

The roof deck of the single story building is subjected to a dead plus live load.

Load types loads used in design load equations are given letters by type. D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load. Dead loads and live loads b. The roof live load in a building is generally a.

Gravity loads and lateral loads. The roof is subjected to a snow load and a dead load while the two upper floors are subjected to floor live load and dead load. Used but they typically defined the load cases or combination stress or strength limits and deflection limits. For wind blowing along one of the two major axes of a rectangular building the side walls are subjected to positive toward the wall pressure true false.

The roof deck of the single story building is subjected to a dead plus live load of 125 ib ft 2 if the purlins are spaced 4 ft and the bents are spaced 25 ft apart. The load combinations in table 3 1 are recommended for use with design specifications based on allowable stress design asd and load and resistance factor design lrfd. The area of the occupied roofs shall not be included in the building area as regulated by section 506. Load combinations provide the basic set of building load conditions that should be considered by the designer.

If the purlins are spaced 5 ft and the bents are spaced 20 ft apart determine the distributed loading t. P3 28 the loading for a single frame line of a three story building is given in the figure. Roof live loads largest roof loads typically caused by repair and maintenance pitch rise span lr 20 r1r2 12 lr 20 lr horizontal projection roof live load 16 r 1 r 2 live load reduction factors r 1 accounts for size of tributary area of roof column a t r 2 effect of the roof rise. The roof deck of the single story building is subjected to a dead plus live load of 125 lb ft 2.

Less than the floor live load. The loading for a single frame line of a three story building is given in the figure. The roof is subjected to a snow load and a dead load while the two upper floors are subjected to floor live load and dead load.