
 | Dec 25, 2004 8:33 am - Concrete, in whatever shape, in really strong when loaded in compression, but has practically no tensile strength. In compression, it’s about as strong as a similar cross-sectional sized piece of wood. That’s why concrete bridge beams are wide on the bottom and narrow on the top; it puts the center of gravity low, making the load from the road deck above it mostly compressive.
Anyway, a thin grouting of concrete in the gap between a door and its frame would be crumbly and weak, and therefore not an effective means of permenantly sealing it. Weld the door, or nail it shut. Run some calculations to determine if welding or bolting the door would be stronger. |