Determine the size modification factor, ψs, for a rectangular beam with b = 18 in. and d = 22 in., four epoxy-coated No. 6 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 12 in. along the span. Assume 4,000-psi lightweight concrete and a clear cover of 1.75 in.

The Attendance assignment is the syllabus quiz which is due on January 14th at Noon; while the other assignments for week 1 are due on January 14th at 11:59 p.m. 

Hooked anchorages provide additional anchorage when there is insufficient straight length available to develop a bar.

In a mechanical splice, the force in one bar is transferred to the concrete, which transfers it to the adjacent bar.

Obesity is a common, serious, and costly chronic disease of adults and children that continues to increase in the United States. Which of the following is NOT included in the CDC on Division of Nutrition, Physical activity and obesity data?

What attribute is used to force a user to enter a value into  a form?

Compute φVn for the cross section shown. Assume f’c = 5,000 psi, fyt = 40,000 psi, d = 28 in., w = 22.5 in., t = 4 in., and that there are four No. 7 longitudinal tension bars and No. 3 stirrups at 10 in. o.c.

A 123-mm-long beam supports a load of P = 32 N at midspan. The cross section is rectangular with width b = 25 mm and height h = 45 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

A 120-mm-long beam supports a load of P = 31 N at midspan. The cross section is rectangular with width b = 26 mm and height h = 40 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

Determine the bar-spacing factor, cb, for a simply supported rectangular beam with b = 16 in. and No. 3 stirrups. This beam has five No. 8 bars as longitudinal reinforcement. The clear cover is 1.8 in.