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Hot weather causes the metal the bridges are made of to heat up and expand. If there was no space for them to expand then the bridge would either crack it's foundations or tear itself to pieces.
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∙ 14y ago
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∙ 16y agoBridges are subjected to incredible forces of wind heat and cold. They need to expand and contract to prevent them cracking or buckling
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∙ 14y agoWhen heat from the sun hits the bridge it needs room to expand otherwise it would crack and fall apart.
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∙ 13y agoSo when the temperature rises the expansion joints prevent the bridge from buckling, cracking, bending or curling.
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∙ 9y agobridges have expansion joints because of .....
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∙ 11y agofsgwsg\know!?!?!?!?!?!?!?
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Why small gaps are left in between two adjacent pieces of railway track?
These gaps are thermal expansion joints, they prevent the rails from buckling when they get hot in the summer. Although modern welded rail only has these gaps every mile or so to reduce the vibration and noise of the wheel crossing them (instead of every 40 feet on unwelded rail). All construction must provide for thermal expansion (e.g. bridges have thermal expansion joints, concrete road paving has thermal expansion grooves).
What are expansion gaps?
Expansion gaps are the controlled gaps between the structure. The gaps purpose is to compensate and go with the changes of the structure overtime.For example: Materials such as concrete shrink overtime and clay expand slowly. So, it is needed for the structure to have expansion gaps to avoid damages.
Why do roads have the gaps between the large pieces of concrete?
They are expansion gaps that allow for the expansion and contraction of the concrete.
What is the property of matter where it changes volume when it changes temperature?
The property of solids in which they enlarge when warmed is thermal expansion. The opposite, shrinking when cooled, is thermal contraction. This property greatly effects how bridges, sidewalks, and concrete roads are made. They all have "expansion gaps," gaps between sections that allow the sections to expand in the heat of summer. Without those, the concrete would break and the bridges would warp and bend.
Why is it that railways tracks laid with gaps in between their end?
The gaps between rails allow for expansion from heat. The space for expansion prebents buckling.
Does concrete expand?
yes, that is why they put expansion joints on bridges. (: your welcomeyes, that is why they put expansion joints on bridges. (: your welcome
Why do metal bridges have gaps at one end?
So it can expand
Why do steal bridges have gaps on them?
The gaps allow the steal to expand as the day gets hotter, and prevent the steal from buckling.
Why do big bridges have small gap in them?
Bridges, along with many other structural elements, expand (get wider and longer) when heated by the climate or by the Sun. If the bridge decks were fit tightly together, the heat expansion would cause them to buckle up and create a serious hazard to vehicles crossing. The gaps let the bridge expand into them, and nothing buckles.
Why are there gaps in railway lines?
because of expansion and contraction.
When molecules move closer together in a bridge during winter how does a bridge not break from the molecules coming closer together?
They design bridges with mechanical sliding gaps to avoid any damage due to thermal expansion/contraction.
Why are the gaps between adjoining rails?
To allow for expansion and contraction.
