The uniform 20-pound ladder is balanced on the rough floor with ms = 0.8 static friction coefficient and against the smooth wall at B. Calculate the horizontal force P that the man needs apply to the ladder to make it move.

The uniform 20-pound ladder is balanced on the rough floor with ms = 0.8 static friction coefficient and against the smooth wall at B. Calculate the horizontal force P that the man needs apply to the ladder to make it move.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Stair construction and layout

Stair is a type of vertical transportation in a building which consist of a series of steps in a flight of stairs that enable the vertical movement of people and materials from one floor to another. A staircase consists of steps that comprises of riser & tread, handrail, baluster, stair stringers, newel post and waist slab. The construction of staircase with all the components is termed as stair construction. A staircase is an enclosure that contains the entire stairway. The materials used for the construction of stairs are bricks, reinforced cement concrete, stone, lumber, steel and a combination of these materials.

Question

The uniform 20-pound ladder is balanced on the rough floor with ms = 0.8 static friction coefficient and against the
smooth wall at B. Calculate the horizontal force P that the man needs apply to the ladder to make it move.
Answer =
_lb
B
O 18
O 16
O 15
5 ft
O 17
O 13
O 11
8 ft
P
O 19
O 12
5 ft
O O o O

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