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Civil Engineering

Civil Engineering is a profession of designing and executing structural works that serve the general public, like houses, buildings, roads, etc. A Civil Engineer is an engineer trained in the design and construction of public works, such as bridges or dams, and other large facilities.

4,921 Questions

What is the severn bridge made out of?

The Severn Bridge is located close to the former Aust Ferry. The bridge is a suspension bridge of conventional design, with the deck supported by two main cables slung between two steel towers. In 1966 the cables supporting the bridge deck were spun from 18,000 miles (29,000 km) of wire[5]. The bridge is 5,240 ft (1,600 m) long, consisting of a 3,240 ft (988 m) central span between the towers and the two 1,000 ft (305 m) side spans. The towers rise to 445 ft (136 m) above mean high water and are of hollow box construction. The deck is an orthotropic steel box girder of aerofoil shape with cantilevered cycle tracks and footway supported from the box

What are a ship's beam?

The ship's beam is usually located at the midpoint of the ship and is considered to be that point where the ship is the widest. The ship's beam is a very important consideration when transversing a canal.

What is an auditorium?

theature has the green room ,n its mre for the performance base structure where as the Audi is the speetch base structure

theature has the green room ,n its mre for the performance base structure where as the Audi is the speetch base structure

What are cable stayed bridges made of?

The primary building materials in cable-stayed bridges are steel, which is used in the cables and also as the reinforcing material in the concrete, which is the other primary building material.

Why do you have cracks in concrete?

Concrete cracks. You can do everything right and use the best materials, it will still have hairline cracks. It's normal.

How long is the Tyne Bridge?

The Tyne Bridge is reported as being either 389A or 397.72B metres long.

Reference A does not cite the source of this figure, whereas reference B reports the source of it's data as one of the Proceedings of the Institution of Civil Engineers and as such the figure of 397.72 metres is likely to be the most reliable.

Please see the related links.

Sources:

A Tyne Bridge Wikipedia Entry - reliability questionable in this instance.

B Tyne Bridge - Structurae Website.

What is the mixing ratio in M40?

1:1:1 (1 part of cement,1 part of sand,1 part of chips stone)

Why is the reinforcement bars place at the bottom of the simple supported beam?

When a simply supported beam is subject to bending; the top of the beam will be subject to compression, and the bottom of the beam will be subject to tension (think about the bottom of the beam stretching as it bends i.e. tension). Concrete is strong in compression but weak in tension, so steel reinforcement is added to allow it to resist this tension and carry bending sufficiently.

Note: bars are generally added to the compression side too but that's for another day.

Will a w8x24 steel beam span 16 feet with a live load of 50lbs psf?

Possibly, but you haven't mentioned thickness of the steel -8 x 24 is not enough info for that calculation.

How do you build a crane for a school project?

If you mean plastic drinking straws than it depends on how many you can use and if you can use sticky tape. Using plastic straws and sticky tape you can make a cylinder like object to hold up the brick.

Difference between bachelor of engineering and bachelor of technology?

The bachelor of engineering degree is usually based on more hard science and theory, while the bachelor of technology is usually based on application, i.e. more real-world use of the technology. A technology major might be considered to be able to come "up to speed" faster in a given area more quickly, while an engineering major might be considered more well rounded and more able to diverge into other areas as needed. My knowledge is 40 years old, but an engineering major is (was) considered, in the long run, to be more valuable than the technology major. After 40 years, of course, experience is the leading driver, and degree is meaningless. (I say this because I have neither degree, but, with my experience, I am considered more valuable than both degree paths, combined, but that is just an aside.)

What type of bridge is the Verrazano-Narrows Bridge?

The main span is 4,260 feet (1,298 meters) long. That is, the span between the towers. The center of the span changes 12 feet in height between the cold of the winter and the heat of the summer. In summer it is lower than in winter. With the towers being 690 feet high and 4,260 feet apart, the curvature of the earth's surface had to be taken into account when designing the bridge -- the towers are 1⅝ inches farther apart at their tops than at their bases.

What is the intial setting time for cement?

  • The initial setting time of cement is 30 minutes
  • The final setting time of the cement is 10 hours.
  • The initial and final setting time of the cement can be found by using the Vicat's apparatus.

What are the applications of complex numbers in civil engineering and building?

This is a rather loose application. The related link shows the fluid flow field of two

water sources near each other.

Refer to related link down below.

What is hydraulic mean radius?

Hydraulic Mean Radius = Cross sectional area of conduit divided by the inside (wetted) perimeter.

How do engineers use scale models?

It is a reproduction of a technical drawing documenting an architecture or engineering design, printed in light sensitive sheets, and characterized by light coloured lines on a blue background

What is the difference between a Civil Engineer and a Civil Computer Engineer?

It could be said that civil engineering is harder because to get a job as a civil engineer you must not only have a degree in the subject matter but must be licensed by the professional civil engineering board. Without this license you cannot legally call yourself a "civil engineer" and no one will hire you.

Currently to get a job as a software engineer there is no licensing requirement and it is even possible to be hired by some companies and call yourself a software engineer without a degree in the subject matter.

This will likely change sometime in the future and legal requirements to have a software engineer's license will be imposed.

How is pre-stressed concrete made?

Pre-stressed concrete is made by using,

  • high strength steel bars(tendons).
  • normal concrete(>M25)
  • sheaths for cable duct.
  • anchors.
  • jacks.

How do concrete pumps work?

== == I really wonder how concrete pumps work, liquid (fluid) concrete has a big viscosity, how the pump overcome this big viscosity. I witnessed many times every couple seconds maybe 4-5 seconds the machine emits a loud thump. I think that sound come from pnomatic part of the machine. If anyone know how is it working, I will be glad to hear it, I wish Merry Christmas to all.

What personlality characteristics should a person have for civil engineering?

Skills & knowledge

Civil engineers need to have knowledge of:

  • civil engineering and surveying methods
  • relevant legislation such as the Resource Management Act, the New Zealand Building Code, by-laws and town planning regulations
  • building materials, and how they work.
Personal QualitiesCivil engineers need to be:
  • skilled at analysing and interpreting information
  • practical and logical, with good problem-solving skills
  • safety-conscious
  • good at planning and organising
  • creative and innovative, with good design skills
  • able to work well under pressure
  • able to work independently and in a team

How you find number of cement bag in one cubic meter?

quantity of cement for M20 in one cubic meter

cement=1440 kg/m3

sand=1700 kg/m3

aggregate= 1600 kg/m3

Lets solve for M20 i.e, 1:1.5:3

1 bag of cement = 50 kg =34.7 litres

=35 litres

i.e, 0.035 m3

(item) (w/c ratio)(water) (cement)(sand)(aggregate)

volume(0.42)(21ltr)(0.035)(0.0525)(0.105)

voids - (0) (0) (0 60%) (40%) (45%)

solidvolume (-) (0.021) (0.014) (0.0315) (0.05775) *sum=0.124

Thus 50 kg of cement gives 0.124 m3 of concrete for M20 at 0.42 w/c ratio.

Hence,

cement required =0.035/0.124 =0.28 m3 i.e, 0.28*1440=403kg

sand required= 0.0525/0.124 =0.42 m3 i.e, 0.42*1700 = 714 kg

similarly aggregate required = 1360 kg

water required = 169 litre

Check: 403+714+1360 = 2477 i.e, density of concrete =2477kg/m3

*NOTE: The quantity of cement, sand, aggregate & water varies with the w/c ratio and the density of materials.