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38 votes

What are those large poles for that are always in front of US stand-alone store buildings?

They are called bollards. Their function is to provide safety for pedestrians from traffic, distracted drivers who may encroach into the sidewalk, or runaway cars e.g a driver who inadvertently ...
kamran's user avatar
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29 votes

What are those large poles for that are always in front of US stand-alone store buildings?

They are called Bollards. But these aren't defensive as suggested. Look closer. There's no curb. This is a new style of store (from the architecture) and curbs have been eliminated for ADA reasons ...
Harper - Reinstate Monica's user avatar
9 votes

What are those large poles for that are always in front of US stand-alone store buildings?

Bollards and other defensive oriented structures significantly predate the 2016 Nice attacks. They have been in place at the construction of many buildings in the US and across the world for decades ...
Will's user avatar
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8 votes
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Why aren't counterweights used more for garage doors?

It makes me wonder why some sort of counterweight system isn't used instead. I'd guess it's because residential garages are normally a bit limited on space and the counterweights need somewhere to go....
grfrazee's user avatar
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7 votes
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Why is it more common to use ceiling fans instead of air pumps?

Mainly cost difference. And also, a fan is sufficient for the job. The problem being solved is thermal stratification. That's caused by a lack of vertical mixing; the warm air rises to the top, the ...
410 gone's user avatar
  • 3,761
6 votes

Why aren't counterweights used more for garage doors?

Seems like to me the reason is a counterweight provides a constant offset to the door weight and that weight changes as the door is brought back to horizontal. I suppose there would be a way to design ...
Jon Liebermann's user avatar
6 votes

Why aren't counterweights used more for garage doors?

I’ll be installing a custom counterweight for my new garage door – it requires some clever engineering to make it work since a residential garage door doesn’t have a fixed weight: its track bends ...
Kuba hasn't forgotten Monica's user avatar
6 votes

Water pump at top floor or bottom?

Think about the pressures. With the pump above the supply line, the pressure at the input of the pump will be lower than the supply. At roughly 2 PSI per foot, you're down about 18 PSI. Since air ...
Olin Lathrop's user avatar
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6 votes

How to build apartment floors/ceilings to not transfer sound?

There's a few ways that engineers quantify sound passing through ceiling/floors: Impact Insulation Class (IIC) Outdoor/Indoor Transmission Class (OITC) Sound Reduction Index (SRI) Sound Transmission ...
Michael Altfield's user avatar
5 votes
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Is there any way I can be sure a wall is NOT load bearing?

That wall has not been designed to be load bearing by a structural engineer. As you say, it only has a single header (top beam) rather than a double, and the verticals aren't cut accurately enough. ...
AndyT's user avatar
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5 votes
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Is it OK for a 2 story house not have a column or pillar

As @SamFarjamirad states it's best to consult a knowledgeable construction engineer where you live, or in your region, because such people would know the building codes & construction practices ...
Fred's user avatar
  • 9,687
5 votes

When an elevator has two buttons next to it, ^ and v, what do they actually mean?

The elevator control system stores various bits of information in a logical fashion. The system will be optimised to maximise the utility of the lift. This generally means moving the maximum number of ...
Transistor's user avatar
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4 votes

Why aren't counterweights used more for garage doors?

The reason counter weights are not used anymore is due to a couple factors. The limited space like they mentioned in the above comments but the main reason for smaller residential garages the added ...
Canadoor. Tbay's user avatar
4 votes
Accepted

Humidity in home is much higher than outside

Sounds like you have covered your bases. The only thing I can recommend is gathering data and considering some scenerios to evaluate that data against. I am not an HVAC guy but can give you the 1000ft ...
ericnutsch's user avatar
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4 votes
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Concrete Slab Deformation

What is the technical term for this? Bending downwards is called sagging. (Technically "sagging" isn't moving downwards; it's bending in a shape that looks like the mouth on a smiley face). One ...
AndyT's user avatar
  • 3,143
4 votes

What are those large poles for that are always in front of US stand-alone store buildings?

They are to prevent "smash and rob". A situation where someone steals a vehicle and drives through a store front to rob the store. Usually an accomplice drives a second vehicle to escape.
blacksmith37's user avatar
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4 votes

can ceramic be used as a building material?

structural ceramic does have some applications in things like engine parts, but its cost and manufacturing difficulty makes it a less ideal choice for something as large as a building foundation The ...
Mohammad Athar's user avatar
4 votes

can ceramic be used as a building material?

One of the foundational principles of structural engineering is obviously safety. And one of the foundational aspects of safety is the ability to show warning signs prior to any accidents. In the case ...
Wasabi's user avatar
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4 votes
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How is electrical building code defined and applied to new constructions?

New homes are inspected by local authorities to comply with local building requlations. As Mike says, give them a call. The National Electrical Code (NEC) are standardized guidelines for electrical ...
StainlessSteelRat's user avatar
4 votes
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How do extra building levels affect the foundation design apart for the extra load?

Foundation's task is not just to support gravity loads, it should resist lateral loads, wind and earthquake, as well. Wind loads are dependent on the geometry of the building and seismic loads are ...
kamran's user avatar
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3 votes
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Translating the name of a type of beam from Russian to English

This is also considered a simply-supported beam. If you want to be more descriptive, you can call it a simply-supported beam with overhangs (the cantilevers beyond the main span). Basically, any beam ...
Wasabi's user avatar
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3 votes
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Why aren't Steel Prefab Buildings common for residential use?

It is actually quite common in Scandinavia in my experience, using steel beams and columns with concrete hollowcore slabs. This PDF describes one example of such a system.
Joel Larsson's user avatar
3 votes
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Can a dry-pipe or preaction valve be used to create a branch off a wet pipe sprinkler system?

Yes, this is permissible NFPA 13 7.1.3 explicitly permits this: 7.1.3 Auxiliary Systems. A wet pipe system shall be permitted to supply an auxiliary dry pipe, preaction, or deluge system, ...
ThreePhaseEel's user avatar
3 votes

What are the limits on building very high buildings using certain materials and architectural style?

The tallest masonry building erected is the Philadelphia City Hall . It is 548 feet high. The issue with building masonry structures is the walls have to support the weight of the building and the ...
Fred's user avatar
  • 9,687
3 votes

What are some advantages of masonry over prefab for homebuilding, or, why are prefab homes so rare in the United Kingdom?

In UK, building codes are unusual. There is something called Mobile Homes Act which specifies particular types of homes as being covered under different protections and building laws than masonry ...
Rhodie's user avatar
  • 984
3 votes
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Why were pneumatic thermostats commonly installed in buildings?

In the 1940's and 50's, dynamic system controllers were invented which used air pressure to work. It was possible in fact to design and build not only analog control mechanisms but also binary logic ...
niels nielsen's user avatar
3 votes

What's the concrete core for in a building?

The concrete core at the center of the building serves in several ways. A structural hard center that is fire resistant and shields emergency utilities and elevators and emergency egress means like ...
kamran's user avatar
  • 22.5k
3 votes
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Can a horizontal foundation safeguard against earthquakes?

Things topple when their center of mass moves past their supports. Think of a square box: if you push it over slightly and let go, it'll fall back onto its original position. But if you push it past ...
Wasabi's user avatar
  • 13.1k
3 votes
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Are the design load values in this floor determination table (span chart) inclusive or exclusive of the given floor weight (inherent dead load)?

The load values in the table is described as the design load with no further qualifiers and that will generally mean the total load including all dead load and live load as well as safety factors. It ...
ingenørd's user avatar
  • 1,288
3 votes

What are those large poles for that are always in front of US stand-alone store buildings?

For safety. They are to protect whatever is behind them from cars. They're very strong and will stop or slow down a car that would otherwise cause a lot of damage or risk to life.
Ack's user avatar
  • 358

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