12 in. 3 in. 2 in. 2 in. 2 in. 3 in. |2 in. 4 in. 4 in. (a) (b) (c) The allowable shear stress in the glued joints is 56 psi, the allowable shear stress in the wood is 175 psi, and the allowable bending stress in the wood is 1,892 psi. (a) If the beam is 12 ft long, what is the allowable load P (in kips) acting at the one-third point along the beam, as shown? (Include the effects of the beam's own weight, assuming that the wood weighs 35 Ib/ft.) kips (b) Repeat part (a) if the beam is assembled by gluing together two 3 in. x 4 in. boards and a 2 in. x 4 in. board (see figure part (c)). kips

12 in. 3 in. 2 in. 2 in. 2 in. 3 in. |2 in. 4 in. 4 in. (a) (b) (c) The allowable shear stress in the glued joints is 56 psi, the allowable shear stress in the wood is 175 psi, and the allowable bending stress in the wood is 1,892 psi. (a) If the beam is 12 ft long, what is the allowable load P (in kips) acting at the one-third point along the beam, as shown? (Include the effects of the beam's own weight, assuming that the wood weighs 35 Ib/ft.) kips (b) Repeat part (a) if the beam is assembled by gluing together two 3 in. x 4 in. boards and a 2 in. x 4 in. board (see figure part (c)). kips

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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Concept explainers

Composite Construction

Composite construction is the construction of structures in which two or more materials are used. Regarding structural engineering, composite construction is a construction where two materials are bound together in a technical manner such that both the materials act as a single unit to carry and transfer the load. The motives of composite construction are to increase the structural strength, make structures more aesthetic, and provide a sustainable environment.

Question

A laminated wood beam on simple supports (figure part (a)) is built up by gluing together four 2 in. x 4 in. boards (actual dimensions) to form a solid beam 4 in. x 8 in. in cross section, as shown in the figure part (b).
2 in.
3 in.
2 in.
2 in.
2 in.
3 in.
2 in.
4 in.
4 in.
(a)
(b)
(c)
The allowable shear stress in the glued joints is 56 psi, the allowable shear stress in the wood is 175 psi, and the allowable bending stress in the wood is 1,892 psi.
(a) If the beam is 12 ft long, what is the allowable load P (in kips) acting at the one-third point along the beam, as shown? (Include the effects of the beam's own weight, assuming that the wood weighs 35 Ib/ft.)
kips
(b) Repeat part (a) if the beam is assembled by gluing together two 3 in. x 4 in. boards and a 2 in. x 4 in. board (see figure part (c)).
kips

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