A 115-mm-long beam supports a load of P = 26 N at midspan. The cross section is rectangular with width b = 30 mm and height h = 45 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

Brittle materials fail due to maximum shear stress rather than principal stresses.

A simply-supported beam has a 5 kip/ft uniformly-distributed load over the left half of its 9-ft span. What is the magnitude of the maximum shear force in the beam?

A simply-supported beam has a 2 kip/ft uniformly-distributed load over the entire 12-ft span. What is the magnitude of the shear force at midspan?

For a beam with stirrup hooks, the free end of the bar must extend at least _____ from the hook. Assume b = 13 in., d = 22 in., and that there are four No. 8 longitudinal tension bars and No. 5 stirrups at 7 in. o.c. The stirrup hooks are 135°.

Shear-failure loads are more variable than flexure-failure loads.

Use ACI 318-14 Table 25.4.2.2 to determine the development length for the straight tension bars (no hooks) in a rectangular beam with b = 16 in. and d = 22 in., four uncoated No. 9 Grade 60 bars placed in the top of the beam, and No. 4 Grade 60 stirrups located every 10 in. along the span. Assume 4,000-psi lightweight concrete and a clear cover of 2 in.

ACI 318 does not provide rules for designing hanger reinforcement.

Paso 2 (3 pts) (1 pt per item: Correct words with omitted or misplaced written accents will receive 0.75 pts) What other activities can Alicia enroll in this semester? Fill in the blank with the appropriate activity below. Complete each sentence to describe the picture with the appropriate expressions using an infinitive form of a verb or a noun in each sentence. Note: An infinitive form of a verb is a word that ends in -ar, -er, -ir, for example, “estudiar”. A noun is a word that names a person, place, or thing. For example, “(el) fúbol”. 

In designing for shear, one must ensure that the shear strength equals or exceeds the flexural strength at all points in the beam.