'The horizontal bands are called "Friday lines" because they mark where the pouring of this was stopped each week'
concrete
TORONTO'S CN TOWER: The horizontal bands are called Friday lines because they mark where the pouring of this was stopped each week
The horizontal bands are called "Friday lines" because they mark where the pouring of this was stopped each week
The horizontal bands are called "Friday lines" because they mark where the pouring of this was stopped each week
TORONTO'S CN TOWER
concrete
TORONTO'S CN TOWER