On: Instant stone (just add water) (2018)

[jasoncrawford]

How does engineered wood do on strength and fire resistance? Would appreciate any unbiased comparisons vs. steel and concrete on those points

[twothamendment → jasoncrawford]

That is something I've wondered too. I imagine foundations, elevator shafts and other key parts might still be concrete. Buildings like this are fascinating: https://www.dezeen.com/2019/03/19/mjostarne-worlds-tallest-t...

[rapnie → twothamendment]

Elevator shafts can be made with CLT too, like for the 9 storey Murray Grove in London built in 2009

http://waughthistleton.com/murray-grove/

[fiter → jasoncrawford]

Burned wood acts as insulation for the unburned core so large timbers can have long fire ratings. The rule of thumb is 1.5" per hour. [0]

I can’t comment on reinforced concrete, but structural steel requires protection to meet 1+ hour fire ratings.

[0] https://www.nishkian.com/fire-rated-wood-construction/