A box beam is constructed of four wood boards as shown in the figure part (a). The webs are h = 7 in., t = 1 in. and the flanges are b= 4 in., t = 1 in. boards (actual dimensions), joined by screws for which the allowable load in shear is F = 300 lb per screw. Flange Flange Web T Web (a) (b) (a) Calculate the maximum permissible longitudinal spacing smax Oof the screws if the shear force V is 1,300 lb. Round your answer to two decimal places. Smax = in. (b) Repeat (a) if the flanges are attached to the webs using a horizontal arrangement of screws as shown in the figure part (b). Round your answer to two decimal places. Smax = in.
A box beam is constructed of four wood boards as shown in the figure part (a). The webs are h = 7 in., t = 1 in. and the flanges are b= 4 in., t = 1 in. boards (actual dimensions), joined by screws for which the allowable load in shear is F = 300 lb per screw. Flange Flange Web T Web (a) (b) (a) Calculate the maximum permissible longitudinal spacing smax Oof the screws if the shear force V is 1,300 lb. Round your answer to two decimal places. Smax = in. (b) Repeat (a) if the flanges are attached to the webs using a horizontal arrangement of screws as shown in the figure part (b). Round your answer to two decimal places. Smax = in.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A box beam is constructed of four wood boards as shown in the figure part (a). The webs are hj = 7 in., t=1 in. and the flanges are b = 4 in., t = 1 in. boards (actual dimensions), joined by screws for which the allowable load in shear is F = 300 lb per screw.
Flange
Flange
Web T
Web
-- b - -
(a)
(b)
(a) Calculate the maximum permissible longitudinal spacing smax of the screws if the shear force V is 1,300 lb. Round your answer to two decimal places.
Smax =
in.
(b) Repeat (a) if the flanges are attached to the webs using a horizontal arrangement of screws as shown in the figure part (b). Round your answer to two decimal places.
Smax =
in.
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