The four 32-story buildings were among the world's first aluminum-sheathed high-rise structures.

"We just shot four high-rise structures in Philly," he says, "three 11's and a 15."

They also pose serious challenges to firefighters during emergencies in high-rise structures.

The building paved the way for the use of aluminum in high-rise structures around the world.

The condominium units will be in the high-rise structures on the perimeter of the complex.

Within the enclave of the new high-rise structures, the old building somehow still asserts itself.

They had all been replaced by high-rise structures that complemented the government compound.

Uptown has accumulated a large concentration of high-rise residential structures.

Also gone were the identical high-rise structures extending down 10th Street.

Initial assessment of the creek area was, in fact, done from the nearby high-rise structures because no one could enter the park.