A solid steel bar with dimensions of

1

x

4

inches spans a 20 foot gap. The beam is loaded with a single 1000 lb load a

t

mid span.

Calculate the

deflection of the beam

at

every

foot along it

s length

.

(That is,

calculate

the deflecton

at x=0,

12,24, 36

...

inches) INCLUDE the weight of the beam. Plot the deflection, y, versus x

a) Why does the shear strength of beams without stirrups increase when the aggregate size increases?

b) Describe a bond-splitting failure. Why do stirrups tend to prevent bond-splitting failures?

c) Why is the “side cover” and “back cover” important when designing hooks for rebars?

d) What is the kern of a footing?

The time area method is often used to estimate catchment runoff process. In this method, the catchment of concern is split into several sub-areas where runoff generated from each sub-area is thought to take the same amount of time to travel to the outlet of the catchment. Suppose a catchment can be split into M sub-areas. For the i-th sub-area (i=1,2,…, M), the size of the area is Ai km² and it takes i-th hours for the runoff generated to reach the outlet. If the catchment is subjected to a net rain process lasting over N hours (N≥1) with a constant intensity of r mm/hour. Using the time area method derive the peak runoff at the outlet of this catchment in m³/s

Find an expression for the average velocity in a smooth pipe if it depends on the viscosity, the diameter, and the pressure gradient dp/dx.

A westbound section of freeway currently has three 12-ft wide lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream and downstream of the segment midpoint. It is on rolling terrain with 10% heavy vehicles and is operating at capacity with a peak-hour factor of 0.9. If the road is expanded to four 11-foot lanes with a 2-foot right shoulder, and traffic after the expansion is projected to increase by 10% with the same heavy vehicle percentage and peak-hour factor, what is the new LOS and estimated density?

On a late May afternoon in 1984, a fire broke out in the “Haunted Castle” attraction at the Great Adventure Park in Jackson Township, New Jersey (Figure 4-1). Eight teenagers became trapped in the haunted house and subsequently died in the blaze. The maze-like “building” was actually a set of 17 interconnected truck trailers; guests walked from one trailer into the next. The dark walk-through haunted house included a variety of fright-provoking scenes, live actors, and a “strobe room.” Plastic polyurethane foam was used in decorations in various areas of the attraction. Plywood partitions were also present throughout. The structure did not have a fire alarm system or a fire sprinkler system. There were no specific regulations for “haunted houses” in the building and fire codes of New Jersey or the rest of the nation at the time of the fire. In the wake of this incident, action on the part of the state of New Jersey was swift. The state’s building and fire codes were changed to include fire alarm systems and sprinklers. These regulations were quickly adopted nationally. Today, these “special amusement” buildings require a fire alarm and detection system, full sprinkler protection, a public address system, low-level exit signs, and a Class A rating for all interior finishes. 1. Why does it often take a tragedy to change our building and fire codes? 2. What are some other fires in the past that have led to changes in our fire safety regulations?

List the stages of Cost Estimating and tell how the accuracy changes for these different stages?

Explain why electrical, mechanical, and plumbing rough-in usually begins before framing is complete.

Give an example of a project where work sampling would be an appropriate productivity measuring technique.

1. Wastewater from Taman Cenderawasih is treated through a bio tower. These are the data related to the bio tower:

Compute:

1. Ratio of recycled flow to the influent flow
2. Hydraulic loading (m³/m².min)
3. Volume of the medium needed

Problem 2: A 3 ft x 5 ft (B x L) rectangular footing is shown in following figure. Using generalized bearing equation (with shape, depth and inclination factors), determine the allowable (safe) load that the foundation carry. Given: gamma = 115 lb/ft3 , c’= 1100 lb/ft2 , phi’ = 35°, Df =3.5 ft, Ground water table is located at 5 ft below ground level. Assume factor of safety = 3. Assume gammasat = 127.4 lb/ft

Curve 2: A +7.00% grade meets a -6.00% grade at station 4+80 and elevation 705.70 ft, 80-ft curve, staked 10ft apart. Get a rough estimate in cubic yards of how much soil that must be brought in (fill) and/or removed (cut) to create a 14-foot wide roadway that starts at your PVC/BVC, ends at your PVT/EVC, and follows your curve elevations. Make sure to state which curve your group was assigned in the calculations. Trapezoidal Area Estimation is key. ground has the following elevations starting from the PC and ending at the PT; 702ft, 703ft, 704ft, 705ft, 706ft, 705ft, 704ft, 703ft,and 702ft.