Building Enclosure Institute

Here is an interesting video showing badly cracked masonry walls. The narrator explains the concrete floor slabs’ spans reach up to 8 meters (over 26 ft), and their maximum deflection was found 3 cm (approx. 1-1/8”). The author did not clarify whether the slab was fully loaded before the measurements, and the measurement meets the typical maximum L/250 deflection limit. (Similar to L/240 limit common in USA). It’s a good illustration of a mismatch between the chosen construction methods, and the reason why good tile setters often insist on placing a reinforcement mesh on a masonry substrate.