rdaner
Senior Member
Taken 24 November.
I am very impressed with how quickly this got to the bottom of the pit and then crane up
Modern mix designs allow for early high strength, sometimes reaching design strength within 24 hours. Typically concrete is tested at 28 days.That must be some fast-curing concrete!
Typically, its allowed to cure a bit longer than that:
Explainer: Installing a Tower Crane, and Its Parts | UrbanToronto
Cranes play an essential role in building construction; their reach and ability to hoist large loads allows a variety of building materials to be placed wherever they are needed to build a structure. In today's Explainer, we explore the installation and the anatomy of a typical tower crane.urbantoronto.ca