Of course your own cost of materials may vary.

The materials cost for the recommended solution above (at the time) was determined to be a little more than $3 per square foot (approximately $100 for a 4×8 section). The calibers were selected based on press coverage of incidents around the nation, as weapons-calibers commonly used in attacks on citizens.Īll test shots were from 7 yards downrange. This determined the ability to withstand penetrations by a number of commonly used bullets.ĩmm.

They performed bullet penetrations tests. The Gypsum (drywall) is fastened for the interior wall aesthetic appearance. Then apparently left in place afterwards as an integral part of the wall. The OSB would be screwed to to the 2×4’s and used as a material strong enough to hold the poured concrete. He concluded that the best bullet resistant wall construction (versus cost) would be poured concrete filling the cavity between 2″X4″ studs, using 1-1/8″ OSB (oriented strand board) fastened to both sides, followed by 5/8″ Gypsum. This particular recommendation was made to the city of Boulder following a series of bullet penetration tests conducted by the city facility manager there. Or to beef up the resistance to slow or stop a bullet. There are many ways to build a bullet resistant wall. For new construction this combination appears to offer the best results at a cost far less than the commercially available ballistic fiberglass.” “ Based on these tests, it is my professional recommendation, when practical, that we utilize the combination of Oriented Strand Board (OSB) and concrete. (actually, we’re talking about bullet resistance) Bullet Proofing Walls With Poured Concrete This is one technique using poured concrete. So I will segue to the OP which is as follows, which may inspire further discussion.įor those concerned about their security in this regard (bullet resistant wall construction). At least “cheap” comparative to other techniques. As well as excellent alternative ideas, some from professionals in this industry, and some references to “bullet proof wall cheap” (using sand or gravel). In particular pointing out one major flaw in the specific technique described (read on to discover it). In particular they were looking for economical solutions (though apparently less than ideal). It covered various techniques being considered for bullet resistant wall construction for the city of Boulder, Colorado. The basis for the original post came from an online report (forgot how / where I found it).

It received excellent and informative discussion which I suggest you read down in the comments below. With that said, this article originally published during 2014. It should be done by a professional within the “hardened structures” industry. Bullet proofing walls and the design thereof.

Can a falling bullet penetrate a roof