A cantilever timber beam with a span of L = 3 m supports a uniformly distributed load w. The beam width is b = 320 mm and the beam height is h = 210 mm. The allowable bending stress of the wood is 6.9 MPa. Determine the magnitude of the maximum load w that may be carried by the beam.

In the figure below, find the value of uniform load w (kN/m) that can be applied on the composite beam if the maximum stresses in steel and timber are 48MPa and 3.2MPA, respectively. Est=195GPa,Etimber=13GPA 120mm W Steel 10mm Timber 300mm 2m 4m 2m 250mm Steel 10mm 120mm

Topic: Restrained Beams 140KN 2.5m 3.5m 5KN/m 3.2m МА 6m MB 11WL2 Pab² 5WL2 Pa?b MA = - MB = - 192 L2 192 L2 INSTRUCTION: 1. Determine the maximum stress in the timber beam with the size of 120 x 370mm.

A TIMBER BLOCK “B x B” mm SQUARE IS REINFORCED ON OPPOSITE SIDES BY A “B” mm AND ‘t’ mm THICK STEEL PLATES. DETERMINE THE THICKNESS ‘t’ SO THAT THE ASSEMBLY WILL SUPPORT AN AXIAL LOAD OF 1000 KN WITHOUT EXCEEDING A MAXIMUM TIMBER STRESS OF 12 MPa OR A MAXIMUM STRESS IN STEEL OF 350 MPa. MODULUS OF ELASTICITY OF STEEL AND TIMBER ARE 210 GPa & 7 GPa RESPECTIVELY.

4. Steel and aluminum plates are used to reinforced 100 x 175 mm timber beam. The three materials are fastened firmly as shown so that there will be no relative movement between them. Given the following material properties, determine the safe resisting moment of the beam in KN.M. Allowable bending stress, Fb Modulus of Elasticity, E Steel = 130MPA Steel = 210MPA Aluminum = 90 MPa Aluminum = 80 MPa Wood = 20 MPa Wood = 15 MPa 30 mm CTEEL WOOD ww.skl A LUMINUM 140 mm

A laminated beam is composed of four (4) planks, each of 150 mm x 30 mm, glued together to form a section 150 mm x 150 mm. The allowable shear stress in the glue is 850 kPa, the allowable shear stress in the wood is 1050 KPA, and the allowable flexure stress in the wood is 10 MPa. Determine the maximum uniformly distributed load which can be carried by the beam on a 45 m simple span.

A timber beam 150 mm wide and 200 mm deep is to be reinforced by bolting on two flitched each 150 mm x 12.5 mm in section. Find the moment of resistance when the flitched are attached symmetrically at the top and bottom. Allowable stress in timber is 6 N/mm². (Es= 20 Ew)

A simply supported wood beam of length L = 8 ft carries a concentrated load P at midspan, as shown. The cross- sectional dimensions of the beam are b = 7 in. and h = 13 in. If the allowable shear strength of the wood is 130 psi, determine the maximum load P that may be applied at midspan. Neglect the effects of the beam's self-weight. 12 Answer: P = IM P B 7/2 C X lb N b h

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(a) Draw the shear and bending-moment diagrams for the beam and loading shown below. 48 kips 48 kips 48 kips B A E -6 ft- 2 ft' 2 ft 2 ft (b)If the cross-section of the beam is as shown below, determine the maximum tensile and compressive stresses. 8 in. 1 in. 1 in.- 6 in. 1 in. 4 in.