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

The loading for a single frame line of a three story building is given in the figure.

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

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. Gravity loads and lateral loads. The roof deck of the single story building is subjected to a dead plus live load of 95 lb ft 2. The roof live load in a building is generally a.

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. If the purlins are spaced 4 ft and the bents are spaced 25 ft apart determine the distributed loading that acts along the purlin df and the loadings that act on the bent at a b c d and e. 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. P3 28 the loading for a single frame line of a three story building is given in the figure.

Load combinations provide the basic set of building load conditions that should be considered by the designer. Load types loads used in design load equations are given letters by type. 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. Using the tributary approach and without taking any reductions find the following.

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. The roof deck of the single story building is subjected to a dead plus live load of 125 lb ft 2. 503 1 4 occupied roofs a roof level or portion thereof shall be permitted to be used as an occupied roof provided the occupancy of the roof is an occupancy that is permitted by table 504 4 for the story immediately below the roof. If the purlins are spaced 5 ft and the bents are spaced 20 ft apart determine the distributed loading t.

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. Dead loads and live loads b.