- Calculate the atomic packing factor for Face Centered cubic and Body Centered Cubic crystal structures

How has sustainable construction materials changed the construction industry?

1) Design forms for 13’-8” high wall to be concreted at the rate of 5 ft per hour, internally vibrated. Assume the mix is made with Type I cement, with no pozzolans or admixtures, and that the temperature of concrete at placing is 75°F. The unit weight of concrete is 150 pcf with a slump of 3.75 inches. The forms will be used only once, so short-term loading stresses will apply. Use form grade plywood sheathing 7/8 in. thick in 5×10-ft sheets, and 5,250-lb coil ties are on hand. Framing lumber of No. 2 Douglas Fir-Larch is to be purchased as required.

Design for SHEATHING and STUD SIZE.                                                                  

Should I use the maximum value for the bending moment in the negative area for compression stress and maximum bending moment in the positive are for tension stress?

Do a quick calculation of the thermal conductance (U value) across a cavity wall consisting of:

1. Outer skin 110mm brickwork (South facing, exposed aspect)

2. 30mm cavity

3. Inner skin of 10mm plasterboard

(Hint: R value and U-values are required)

Between 4:00PM and 6:00PM the vehicles arrive to the entrance ramp of a regional toll road at a constant rate of 1740 vehicles per hour. The toll plaza at the entrance ramp has five toll booths, which combined can process up to 34 vehicles per minute. At 4:30PM one of the toll booths is disabled due to electronics malfunction, which reduces the vehicle processing capacity of the toll plaza to 27 vehicles per minute. At 5:00 PM the toll booth is repaired and the toll plaza capacity is restored back to 34 vehicles per minute. Assuming that the vehicle arrivals and departures at the toll plaza have uniform deterministic distributions, determine the total duration of the queue that had formed due to the toll booth closure, in minutes.

List the benefits of directing roof runoff to an infiltration bed, and also, the risks. Why would a surface infiltration bed probably perform longer than an underground one?

IRC procedure for design pedestarin and traffic signal in about 200words

Design traffic signal by Webster method
For average flow of traffic are 400 and 250 pcu/hr. Saturation flows are 1250 and 1000 pcu/hr.. Calc all red for pedestrians in 12 sec

Why should a control station be observed at the start of a real-time kinematic survey? Thoroughly explain your answer.

Define the following terms, in your own words, as they relate to GNSS positioning: a.Pseudorange, b. Integer Ambiguity , c.Multipath

Describe the wireless solution you would recommend for EACH of the following three organizations, and give the rationale for your decision using at least three criteria for that choice. There could be a combination of these options for an individual organization.

1. General Hospital – GH has five floors, each about 30,000 square feet in size for a total of 150,000 square feet. They want to provide a wireless overlay network in addition to their 100Mb switched wired network. They have a bid for 802.11g access points at a cost of $100 each and a bid for 802.11n access points for $300 each. They expect to need 200 NICs. 802.11b NICs came built into their laptop and desktops. 802.11n NICs cost about $100 each. What would you recommend and WHY?

2. Central University – CU wants to add a wireless overlay network to one 20,000 square foot floor in its business school building. They have a bid for 802.11g access points at a cost of $100 each and a bid for 802.11n access points for $300 each. Students will buy their own computers, most of which will come with 802.11n NICs. What would you recommend, and WHY?

3. Ubiquitous Offices – UO provides temporary office space in cities around the country. They have a standard office layout that is a single floor with outside dimensions of 150 feet wide by 150 feet long. The interior is drywall offices. They have a switched 100Mb wired LAN but want to add WLAN as well. Data rates have been shown to slow dramatically when the distance from a laptop to the wireless access point exceeds 50 feet.

1. How many access points would you recommend and where would they be placed?
2. Draw the office and show where the access points would be located.
3. Show coverage for each access point with a circle, and label the channels (1, 6, 11)

Why are multi-frequency GNSS receivers preferred for high accuracy control surveys? Thoroughly explain your answer.