5.11-5 A box beam is constructed of four wood boards as shown in the figure part a. The webs are 200 mm × 25 mm and the flanges are 150 mm x 25 mm boards (actual dimensions), joined by screws for which the allowable load in shear is F = 1.1 kN per screw. (a) Calculate the maximum permissible longitudinal spacing smax of the screws if the shear force V is 5.3 kN. (b) Repeat part (a) if the flanges are attached to the webs using a horizontal arrangement of screws as shown in the figure part b. Flange Flange 25 mm Web 25 mm Web 200 mm 200 mm 25 mm 25 mm 25 mm 25 mm |-150 mm --| - 150 mm 25 mm 25 mm (a) (b) PROBLEM 5.11-5

5.11-5 A box beam is constructed of four wood boards as shown in the figure part a. The webs are 200 mm × 25 mm and the flanges are 150 mm x 25 mm boards (actual dimensions), joined by screws for which the allowable load in shear is F = 1.1 kN per screw. (a) Calculate the maximum permissible longitudinal spacing smax of the screws if the shear force V is 5.3 kN. (b) Repeat part (a) if the flanges are attached to the webs using a horizontal arrangement of screws as shown in the figure part b. Flange Flange 25 mm Web 25 mm Web 200 mm 200 mm 25 mm 25 mm 25 mm 25 mm |-150 mm --| - 150 mm 25 mm 25 mm (a) (b) PROBLEM 5.11-5

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Bending Moment

In general, we can define the bending moment as the reaction induced when a certain amount of load or force is applied to an element which makes it bend.

Question

5.11-5 A box beam is constructed of four
wood boards as shown in the figure part a. The
webs are 200 mm × 25 mm and the flanges are
150 mm x 25 mm boards (actual dimensions), joined
by screws for which the allowable load in shear is
F = 1.1 kN per screw.
(a) Calculate the maximum permissible longitudinal
spacing smax of the screws if the shear force V is
5.3 kN.
(b) Repeat part (a) if the flanges are attached to the
webs using a horizontal arrangement of screws as
shown in the figure part b.
Flange
Flange
25 mm Web
25 mm
Web
200 mm
200 mm
25 mm
25 mm
25 mm
25 mm
|-150 mm --|
- 150 mm
25 mm
25 mm
(a)
(b)
PROBLEM 5.11-5

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