A simply supported masonry lintel spans across a 16-ft opening, and supports a uniformly distributed load of 1400 lb/ft, including self-weight. Assume that two-thirds of the load is due to dead load, and one third to live load. Using the strength-design provisions, design the masonry lintel. (Use CMU blocks with 8” nominal dimensions, fully grouted CMU, f’m=1500 psi, d=46in)

Trimmers provide the support necessary to transfer the load carried by the headers to the foundation. True O False

The reinforced concrete cantilever retaining wall is made with 3000 psi normal weight concrete and reinforced with Grade 60 galvanized steel. the main reinforcement rests flexural stresses in the stem and is specified as #7 bars every 18 inches along the length of the wall. The distribution seal distributes stresses along the length of the wall and is specified as #4 bars at 12 I spacing. The concrete cover is 1.5 everywhere. Calculate the developmental length for the main reinforcement using the basic equation (ACI 318 -19: 25.4.2.4). Assume no transverse reinforcement Ktr-->0). Is the main reinforcement embedded deeply enough in the footing to fully develop its yield strength in tension?

What is the stage before failure of an axially loaded prestressed member?