answersLogoWhite

0


Best Answer

According to a Glossary of Bride Terminology, there are several choices:

  • An ice apron, aka ice breaker or starling, that is placed on the upstream end of a bridge pier to protect from moving ice.
  • An ice-break or ice-breaker is a structure (masonry or timber) that protects the bridge pier from moving ice.
  • An ice guard is a structure placed placed on the up-stream side of the bridge pier that diverts the ice or breaks large pieces into smaller ones.
  • A starling is also called a cutwater. Those are structures that generally protect the structure from damage by water, ice and drift.
User Avatar

Wiki User

6y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What structure on a bridge breaks or wards off floating ice?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Engineering

What would a power-kraft metal lathe model 04tlc-700 be worth?

Like everything else, it's worth whatever someone is willing to pay for it. In excellent condition with lots of 'tooling' like chucks, rests, attachments, extra parts, etc. a nice clean Wards lathe might be worth $1000 or more. A rusty, dirty, neglected or abused old example with no extras and in poor condition? Maybe a hundred bucks......maybe less. hth, Steve


Why silencer is up in the tractor not down wards?

ill take a stab at this and say im assumming that the silencer is "up" instead of down in a tractor is that if the silencer faces down then the sound hits the ground and bounds up to retain the same note or tone or atleast reduce the silencing effect to an extent, sort of the same is you cup your hands around a cell phone speaker, it sounds louder as it has more "walls" that the sound wave hits and there fore "sounds" louder but it is the same level just the sound waves have had there sound redirected, if its up in the air then the waves have less resistance to be expelled freely. hope this helps, welcome improvements if i have misstated something, cheers


How do you convert a shallow jet well pump to a deep well pump?

Depending on your pump, you may not be able to convert it. There are three basic kinds of jet pumps for wells. Shallow, Deep and Convertible. In the typical configuration the shallow well pump is the easiest to identify. It should have a single opening (1 1/4" diameter) on the front face. All the pumps will have the discharge on the top of the pump (1 1/4" diameter). The dimensions in parentheses are from my old Montgomery wards 1.5 hp pump to give a reference. The Deep well and convertible pumps will have two openings on the face. Depending on the manufacturer and model they can be big on top or big on bottom. In the deep well installation, the eductor and venturi are usually located within 10' of the water surface during well drawdown. In the convertible installation the eductor and venturi are typically bolted directly to the face of the pump, covering the two holes and providing just the one suction line. Hopefully you have a deep well or convertible type with the eductor and venturi bolted to it. All you have to do is extend the two lines on the front of the pump to the eductor/venturi (within 10-feet of the water surface) and then continue one suction line don into the water and place a foot valve on the end. try going to the pump manufacturer's website and reviewing the installation manual, it should have some good pictures that will point you in the right direction.


Comparison between Yokogawa Emerson DCS?

I've spent a few years involved in the specification and requisitioning of a large (10 000+ I/O) Honeywell DCS, and before that I spent 2 years doing the same for a large yokogawa DCS. When it came to both the hardware performance/capability and the quality of engineering, there is no comparison, Yokogawa won by a long way. I can't comment on price. A few gripes I've had with Honeywell: 1) Inter-plant signals - signals had to be hardwired between controllers if they are to be passed from one community/domain to another to maintain a scan rate of 1 second. Sort of takes word 'distributed' out of DCS. 2) Graphics are very limited in the number of tags/variables and many of them had to be split up - much to the operators dismay. 3) Sheer volume of unnecessary documentation - for example, they submitted a 50 page document for review describing the typical software for a differential pressure indication. The industry has changed a lot of the past few years especially with increased pressure for good resources so I'm sure all DCS vendors are subjected to the same engineering quality problems. Therefore will not go into the engineering issues we had. Hope that helps. ===== I am not fully agree with the above explaination. You may be a Yokogawa supporter, but don't just give false information to other. 1) Inter plant connectivity can be achieved through DSA (Distributed Server Architecture) configuration. 2) Graphics are built for man-machine interface only. Off course, if you want the whole plant to be in one graphic page then that's create performance issue. If you built and arrange your graphic pages properly, there should not be any issue raised. 3) Nobody will agree that 50pages are submitted for a pressure loop description. I have seen SDM (Software Design Manual) from Honeywell used for a particular project. It was nice and explanatory. regrds --------------------------- The one u said on the new Honeywell DCS ... EPKS .... I am using Honeywell for a long time.... but as a customer we are looking at the work quality and products ..... I am not sure about Yokogawa but I believe it does have similar problem like Honeywell... Products problem: 1. Too many bugs 2. No experties in Malaysia for new products 3. SUpport team lack of compentency 4. Product reliability and availability weak... and all of this contribute more cost to customer where they had to pay them just to fixing things that they also not really expert... this the reason why user keep asking and concern on the cost for them to repair. anyway .. both system has their own weakness... so the only ways is how we ensure they deliver the good quality one..