ECN Forum Forums General Topics of the Trade General Discussion Area prefab floor joists? how too?

Alan, is this about my "hundreds of years of engineering" comment?

For a thousand years or so after the fall of the Romans the formula for concrete and mortar was lost.

Craftsmanship, and engineering science have died several times. And fortunatley so, I would hate know the punishment for failing to head the engineers warning on the drilling of "the stone lam".