Hi William,
Can you point out where "steel also cut when they cross the penetration"? It's clear where the steel frame protrudes thru the opening, but difficult (at least for me) to see where the issue lies.
Can you point out where "steel also cut when they cross the penetration"? It's clear where the steel frame protrudes thru the opening, but difficult (at least for me) to see where the issue lies.