Questions tagged [construction-management]

This tag should be used for questions regarding work, material and equipment schedules, cash flow and cost analysis in projects, critical path methods, and other subjects regarding the flow of work, time, and money in construction. This is similar to project management.

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53 views

How deep do you have to check for problems underneath a building site?

When you're putting up a new building, you have to check the soil underneath for stability. How deep do you typically have to check? What's the extent of your "due diligence" when ensuring that a ...
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32 views

what is the chance of sustaining load if beam is 20 feet long? [closed]

what is the chance of sustaining load if beam is 20 feet long as center pillar of house is removed in first floor and added 20 feet long beam with 20 mm rods in RCC beam? House details :: 30*40 sq ...
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29 views

Waste Foundry Sand as an aggregate for concrete mixes. I have a question regarding grain diameter and it's possible applications

I'm working on a project with a company that uses sand casts during moulding processes and they provided us with samples of the sand they use before it's involved in the procedure and afterwards (...
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What degree of open span/narrow support can rigid PIR thermal insulating foam sustain under the short term load of setting concrete?

I've found data related to the deformation and shear performance of typical PIR (polyisocyanurate) foams such as Celotex/Kingspan, but I'm not sure how to use these figures in my own situation. I am ...
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11 views

How to specify plumbing fixtures so models are not immediately out of date

Rock-solid guide specifications are the ultimate pipe-dream of consulting engineers because they minimize the amount of time that needs to be repeatedly spent on the minutiae of tiny details from ...
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34 views

Will screed on plywood do instead of beam and block, to replace a floor?

I'm gutting and redoing an older house (early 20th C, ordinary suburban terrace house, London UK). I'd planned beam and (dense) block for the upstairs structural floor, for a few reasons, and already ...
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0answers
90 views

How many Technical Rescue: Collapse Units are there in the US? [closed]

In a story about today's Miami bridge collapse, I saw this photo: In the upper left, there is a white box truck which seems to say "MIAMI DADE FIRE RESCUE / TECHNICAL RESCUE / COLLAPSE UNIT," even ...
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1answer
32 views

Gypsum board damages(fire rated)

Is it acceptable for fire-rated gypsum board to be stored outdoor (covered parking area) in a humid city? Is it acceptable to be damaged at edges and sides? Does it need spacers when stored flat on ...
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1answer
60 views

Relationship between Material cost and Labor cost

I am currently into an estimating job for a small construction company. In my previous experiences, in calculating the labor cost for a certain job, Labor cost = material cost * 0.45 I did this to ...
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1answer
14 views

What is Design Element in the context of asset management

In the context of physical asset management (BIM etc) what is a Design Element? I have come across the term several time but never in an official document - can anyone explain the term and provide a ...
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1answer
76 views

Where to start when studying Architectural Engineering by myself? [closed]

I have this idea of creating my own curriculum for studying Architectural Engineering. I aim at talking with actual architectural engineers in my surroundings and ask them for advice on the topics I ...
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0answers
279 views

Tower crane with lift (elevator)

Near my apartment is a building site with a tower crane; great fun to watch of course. This crane seems to have a lift / elevator / vertical-people-transporter (arrowed in the picture). As far as I ...
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2answers
268 views

How they put heavy cranes on top of the building?

I saw crane on very tall building. How do they put such heavy item on such high building?
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62 views

How feasible is a 200km long tube with no curvature? [closed]

By no curvature I mean not following the earth's curvature. Would it be easier to tunnel the middle through the earth or raise the ends out of the earth? Is there anywhere that this kind of ...
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1answer
511 views

Aluminium Beam - is it fit for purpose? Can it easily support this load? [closed]

I want to mount two patio heaters on my terrace in front of a window wall. I cannot attach anything directly to the window wall so I am going to run an aluminium box beam between two brick columns. ...
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1answer
276 views

Slack time in critical path method

Can an event on the critical path have non zero slack time in critical path method?
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2answers
518 views

Why use two tower cranes on one construction site?

I am fascinated by construction. My university is building a new facility, and they are using 2 tower cranes in the construction. Why would a contractor choose to use 2 cranes on one construction ...
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2answers
644 views

Why did they build a sarcophagus over Chernobyl instead of pouring concrete over the building? [closed]

Wouldn't it be easier to just pump concrete over the reactor until it's all covered up with a solid concrete instead of hurting so many workers and putting so much effort and costs building a ...
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1answer
252 views

Construction Entity and Construction Complex

I attend to engineering design of a new irrigation system, comprising 4 pump stations and 3 lengthy water mains between them. Definitions by ISO 12006-2: Construction Entity is an independent ...
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192 views

Deflection of Acrylic Shelf

I am installing an acrylic shelf, 75-1/4" L x 10" W x 1-1/2" deep. It is fixed to the wall at the short ends. Should I be worried about deflection in the center of the shelf when weight is added? Is ...
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3answers
610 views

Tower crane with a cabin on ground level

Pardon me for kind of a stupid question, but I keep wondering. Traditionally, tower cranes' cabins are located at the top of the tower. I can understand why it have been necessary up to ~1990s, when ...
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1answer
265 views

Why do we need to take distance of center gravity of a distributed load to a point in order to calculate moment?

From the picture above, in order to calculate the moment of load acting on the beam we take moment $M=\frac{W}{L}×L×\frac{L}{2}$. Why can't we calculate the moment as $M=\frac{W}{L}×L×L$? Why do we ...
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2answers
456 views

If gypsum has been added into clinker during the production of cement,is curing process still needed to be carried out?

Gypsum is used to prevent immediate stiffen and reduce heat loss of cement. If gypsum has already been added into cement,do we still need to undergo curing process after that?
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1answer
142 views

How to construct a very large circular wall made of concrete? [closed]

Here's the situation: a thin concrete wall needs to go up, but it's a very large diameter, say 1 km. The wall thickness is on the order of 20 cm. The wall only needs to be maybe 3 meters high. I'm ...
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1answer
2k views

Bulk Volume vs. Solid Volume

If I pour a sample of aggregate into a container full of water and measure the displacement of the water due to the sample, does this give me Bulk Volume or Solid Volume? And what is the difference?
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433 views

What is the justification for working on such large stretches of road?

I live and work in the UK, a country known for relentless roadworks. Last week I drove through roadworks on the M1 that lasted for 18 miles, necessitating road users driving at 50 mph. Of course, ...