The gaps that are put in place at the time of construction are called, "expansion joints". When concrete, and other materials, heat up, they expand. If concrete expands too much it will press against other sections of concrete and can break or "buckle". When sections of concrete press against each other too hard, sometimes two adjacent sections will press up, creating a dangerous condition for anyone walking on the sidewalk.
Expansion joints give a little space for the concrete to expand before anything bad happens. Even with expansion joints, it's sometimes not enough.
Supply is the amount produced and demand is the amount that is wanted.
They're called "expansion joints". Concrete expands and contracts with temperature changes. The expansion joints allow this to happen without cracking the concrete slab.
Holiday style
I prefer to walk on the right side of the road.
walk on it,ride your bike on it,or walk on the north side of the bridge, which is the side where pedestriands can walk.
You should walk on the left side of the highway, facing oncoming traffic.
In most countries, people walk on the right side of the road.
In most countries, people walk on the right side of the road.
A Walk on the Wired Side was created on 2000-08-05.
The duration of Walk on the Wild Side - film - is 1.9 hours.
You should walk on the left side of the road, facing oncoming traffic.
You should walk on the left side of the road, facing oncoming traffic.