A rectangular beam with cross section b = 14 in., h = 20 in….
A rectangular beam with cross section b = 14 in., h = 20 in., and d = 17.5 in. supports a total factored uniform load of 3.20 kips/ft, including its own dead load. The beam is simply supported with a 19-ft span. It is reinforced with four No. 8 Grade 60 bars, two of which are cutoff between midspan and the support and two of which extend 10 in. past the centers of the supports. The concrete strength is 3,300 psi (normal weight). The beam has Grade 60 No. 3 stirrups satisfying ACI 318-14 Sections 9.7.6.2.2 and 9.6.3.3. The strength of the four bars is φMn = 214.5 kip-ft, and the strength of the remaining two bars is φMn = 115.8 kip-ft. Determine the distance from the support to the theoretical cutoff point (i.e. disregard ACI 318-14 Section 9.7.3.3).
Read DetailsDetermine the lightweight modification factor, λ, for a rect…
Determine the lightweight modification factor, λ, for a rectangular beam with b = 16 in. and d = 23 in., five galvanized No. 8 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 3 Grade 60 stirrups located every 8 in. along the span. Assume 6,000-psi normal-weight concrete and a clear cover of 2 in.
Read DetailsThe PNP is caring for a child with Pompe Disease. Unfamiliar…
The PNP is caring for a child with Pompe Disease. Unfamiliar with the disease, the PNP “googles” the disease and notes it causes tissue damage and destruction from the accumulation excess glycogen not being removed from the cell. The PNP realizes what cellular organelle is involved, as this organelle is responsible for making enzymes and clearing excess substances/waste from the cellular cytoplasm?
Read DetailsDetermine the casting-position modification factor, ψt, for…
Determine the casting-position modification factor, ψt, for a rectangular beam with b = 16 in. and d = 24 in., three epoxy-coated No. 7 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 60 stirrups located every 10 in. along the span. Assume 6,000-psi lightweight concrete and a clear cover of 1.75 in.
Read DetailsDetermine the maximum axial strength φPn,max for the followi…
Determine the maximum axial strength φPn,max for the following circular spiral column.Column diameter, h = 22 in.Number of longitudinal bars = 10Size of longitudinal bars = No. 6Size of spirals = No. 4Concrete strength = 5,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of spirals = 60,000 psi
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