Define the following by text and drawing figures.
(a) Median diameter

(b) Bimodal sediment

If you have been approached to design an office for a medical clinic. Clarify in detail your initial step. (Facilities Planning )

1. The CBR value of subgrade soil is 5%, calculate the thickness of a flexible highway pavement as per the relevant Australian standard.

2. What are the benefits of using the geotextile layer in the construction of haul roads? Explain briefly.

who are the people that will benefit in the study of research topic "Impact of Variation Order in Construction Projects?"

Suppose that the two approaches to a freeway merge, labelled 1 and 2, have individual capacities of 2000 veh/h and 6000 veh/h, respectively. Suppose that the two approaches can send a combined maximum flow 6000 veh/h through the merge without queues forming. Suppose as well that if both approaches are queued, vehicles enter the merge in a 1:3 ratio; i.e., three vehicles from approach 2 for each vehicle from approach 1. At t = 0, there are no queues in neither of the approaches. From t = 0 to t =1h, demand on approach 1 is 1500 veh/h and demand on approach 2 is 5500 veh/h. After t = 1h, demand on Link 1 becomes 500 veh/h, and demand on Link 2 becomes 4500 veh/h. Sketch the input output diagram for Links 1 and 2 and calculate the duration where queue persists on these links. [5 marks]

Open-web steel joists are to be used for a roof with a live load of 30 psf and a dead load of 18 psf (not including the joist weight) on a span of 44 ft. Joists are 5 ft on center, and deflection is limited to 1/360 of the span. Select the lightest joist.

1. Which criterion must be applied to determine the ideal facilities plan?

iv) How can the true color of objects be affected by artificial lighting? Explain briefly.

v) “The room is too loud. My ears are ringing everyday” What type of room is this? Suggest solution / solutions for this problem.

vi) What does it mean that a room has good sound control ?

A section of highway has the following flow-density relationship, where flow (q) is in veh/h and density (k) is in veh/km. ? = 60? − 0.24? 2 What is the speed when the highway is at 50% of its capacity and the traffic is in uncongested conditions? [5 marks]

Design a coarse screen and calculate the head loss through the rack, using the following information:

• Peak design wet weather flow 1.98 /s

• Velocity approaching rack at peak wet weather flow 0.80 m/s

• θ = 50°, with a mechanical cleaning device.

• The bars are 12mm thick and opening are 35 mm wide.

• Upstream depth of wastewater 1.52 m (Not depth of screen)

• Use rectangular bars with semicircular upstream face

Calculate:

a)      Screen dimensions: height and width.

b) The number of bars.

c)      Velocity through screen bars.

d)     Width of the channel.

e)      Head losses through the screen.

How to start the operation of HVAC sizing of a building?

Customarily, people tend to spend most of their time indoor at home and in the workplace. As such, it is essential to improve Indoor Environmental Quality (IEQ) to enhance occupants’ health and wellbeing. Recommend three (3) IEQ aspects including daylighting and rationalise their interrelations with design decisions supported by scientific evidences or means to secure office building users’ comfort, health, and productivity.

For an opened joint with infill materials (i.e. filled joints), its shear strength is affected by the type and thickness of the infill material. State two (2) types of infill material and explain how each type affects the strength of the filled joint.

Fixed load bending moment MD = 130 kN·m, live load bending moment ML = 140 kNNm
Rectangular short beams with width b = 400 mm and depth h = 600 mm are designed as follows:
Determine design suitability. Assume the coating thickness is 40 mm.(f ck = 27 MPa, f y = 300 MPa , tensile reinforcement 6-D22, shear reinforcement D10)