Bomb truck barrier - GIF

[Frank S]

When I was in the Middle East we made a lot of these barriers
completely self contained the hydraulic pump could either be located inside or mounted in a control booth there was a nitrogen pressurized accumulator mounted inside .
the system was closed loop not only were there springs inside the cylinders but in-order to retract the barrier the cylinders had to be pumped down then the system was held closed via solenoid valves any disruption in the electrical the barrier deployed and could not be lowered without a 30 ton load or pumped down. If say a car or medium sized truck had its front tires on the barrier plate when it deployed the vehicle would almost be tossed, as the pressure from the accumulator would be expelled into the cylinders at a rate to 200 gallons per minute it took only 2.5 gallons to fully deploy the cylinders or about 1/2 second to go from flat to 3 feet high

These drawings do not show the system
the top plate is 3/4" thick

[ranald]

Thanks Frank. We all know such items are needed in hostile places but some of us (like me ) take it for granted that home is safe. Before 911 it was just the IRA and an occasional person with an axe to grind who was a threat but so much goes on behind the scenes that most of us are privilaged not to know about while all the time demanding transparency. Some have heavy consciences while others sleep sound as a button.

[NeiljohnUK]

Thanks Frank. We all know such items are needed in hostile places but some of us (like me ) take it for granted that home is safe. Before 911 it was just the IRA and an occasional person with an axe to grind who was a threat but so much goes on behind the scenes that most of us are privilaged not to know about while all the time demanding transparency. Some have heavy consciences while others sleep sound as a button.

Just the IRA... Well they did enough killing, not just in Eire or N.I. or even just the UK. Where I sit in Southern England they blew up a number of shops and public places. One female terrorist having brought down a Police officer with a leg shot went back, stood over him and blew his brains out, at the time Americans were the main funding source of and specialist sniper suppliers to the IRA. The IRA could also found to be training in the Middle East with American government funded Islamic terrorists training to fight Americas proxy wars, especially against the Russians in 'stan. The current mess in Syria has a lot of similarities.

As yea sow, so shall yea reap...

And for all the good the Good Friday agreement may have done with PIRA, CIRA and RIRA continue the 'struggles' (is it terrorism, or just a cover for criminal activities?) to this day.

[ranald]

Pretty darn sad what some do in the name of peace or terror. A friend always says "they should all be put against a wall....." but that would bring more out.

[Toolmaker51]

Pretty darn sad what some do in the name of peace or terror. A friend always says "they should all be put against a wall....." but that would bring more out.

Save a wall, patching and occasional cleaning. Initiating a vest, not much time to freak out, plenty to bail though.
Make them test barriers, locked inside to drive trucks as in post #12 GIF.
Aren't getting 72 virgins either way . . .and no consumer agency to file false advertising claims to boot.

[ranald]

Wow! Reminds me when my late partner was industrial health nurse for Mack Trucks at head office/plant in Brisbane in 80's.
A guy was finishing a truck's air con ready for collection that day (Christmas eve) & when he turned the key (cab tilted) to test the air; the truch started and took off through the meals room where some were eating during their break. A very quick thinking guy pushed the lunch ones out of the way & no one was hurt physically, as the truck demolished the room. The vehicle was not delivered that day.