Floyd
Antediluvian
- Joined
- Apr 2, 2019
- Messages
- 7,861
They seem to use a lot of 9'' 'concrete hollows' over there in certain states- garden walls etc- where as here they are used more for farm sheds/ out-buildings etc and especially retaining walls as you can fill them with poured concrete and re-bar as well.Yeah interesting. So bottom line really is that it is only the larger projectiles that will make it through brick walls.
Also interesting that US construction techniques clearly differ from UK ones quite significantly sometimes.
I would have thought the 'dry wall' (plasterboard) would offer little resistance to anything really, seeing as I fell against a plasterboard wall once and my hand went straight through it and out the other side.
I remember seeing something once about how tank armour is made and they pointed out that they incorporate cavities in the armour as these slow down projectiles by dissipating the energy with each subsequent impact with the next layer, rather than one solid piece that can fragment when hit.
When not filled with concrete they are quite weak though. A good tap with a hammer will break them. Even 4'' 'concrete solids' would as well, but I bet they would offer better protection than an un-filled 9'' hollow.