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Overloaded bins caused building collapse, two worker fatalities
International NutritionAn Omaha building collapse that killed two workers and injured nine others was caused by overloading nine storage bins on the building's roof level, an OSHA investigation has found.
The January, 2014 incident at International Nutrition, Inc. occurred when a structural failure of the east side truss caused the bins to collapse down three floors into the center of the facility. OSHA determined that the bins that supported the east side truss were loaded with an excess of limestone. The extra weight caused the bins to collapse.
Why the World Trade Center Buildings Collapsed
A Fire Chief ’s Assessment
vincentdunn.com...
Recommendations for constructing the new high rise buildings on ground zero
The steel columns, girders and floor beams should be encased in masonry or other more effective fire retarding material. Spray-on fire retarding is ineffective. Post fire investigations reveals the spray on fire retardant has scaled off and steel beams and concrete and steel floor slabs crack and allow flame spread.
Lightweight bar joists should not be used to support floors in high-rise buildings. The National Fire Protection Association has shown unprotected steel bar joist fail after five or ten minutes of fire exposure.
For life safety in high-rise buildings bring back the smoke proof tower. This allows people to escape fire using smoke free stairways.
Stairs and elevator shaft ways should be enclosed in masonry to prevent smoke spread.
Heating ventilation and air condition HVAC systems should be provided by unit system serving only one or two floors. Central air system serving 10 or 20 floors creates shaft ways and duct systems that penetrate fire rated floors walls partitions and ceilings. Smoke spreads throughout ducts of central HVAC systems.
The high rise building framework should be skeleton steel framing not center core steel column framing. There should be no bearing wall high rise construction. Reduce the size of open floor design.
Increase the thickness of concrete in floor construction. The two or three inches of concrete over corrugated steel fails during most serious high rise fires and must be replaced.
Automatic sprinklers should protect all high rise buildings. Firefighters can extinguish approximately 2,500 square foot of fire with one hose line. Two hose steams may quench 5,000 square feet of fire. The World Trade Center floor areas were 40,000 square feet in area.
Federal, State and Port Authority buildings should comply with New York City building codes and actually in some cases should exceed them. Remember building codes are only minimum standards.
originally posted by: bobw927
Everyone be-leaves different things about 911 mostly due to the lack of information and will be that way for many years to come, their are too many Unanswered Questions but there are some things that are obvious,
how convenient that the US Military with having a drill the same day of the attack and would make the situation more confusing. how convenient the only jet fighters they had were two and were hundreds of miles away and were sent in the wrong direction at first. how convenient the phones weren't working in Washington DC that day But the White house and Air Force one have the most HI Tech communications. how convenient the hole in the Pentagon was so tiny a passenger jet would have never fit through that and no marks for the wings and where were the wings ? and a woman employee walked out that hole and saw NO PLANE and No Plane or Bodies in Shanksville. how convenient FDNY Radios were not working properly. how convenient many of the FDNY and NYPD cars a block away were burnt and not from the buildings fires. and building 7 and the comment from silverstein "we are going to pull it" before it came down. and all the mysterious deaths after 2001 related to 911. And Steel Columns that looked like they were PRE-SLICED for weakening. and so much more we will never have All the Answers.
originally posted by: neutronflux
a reply to: turbonium1
Thought this was of interest too
Why the World Trade Center Buildings Collapsed
A Fire Chief ’s Assessment
vincentdunn.com...
Recommendations for constructing the new high rise buildings on ground zero
The steel columns, girders and floor beams should be encased in masonry or other more effective fire retarding material. Spray-on fire retarding is ineffective. Post fire investigations reveals the spray on fire retardant has scaled off and steel beams and concrete and steel floor slabs crack and allow flame spread.
Lightweight bar joists should not be used to support floors in high-rise buildings. The National Fire Protection Association has shown unprotected steel bar joist fail after five or ten minutes of fire exposure.
For life safety in high-rise buildings bring back the smoke proof tower. This allows people to escape fire using smoke free stairways.
Stairs and elevator shaft ways should be enclosed in masonry to prevent smoke spread.
Heating ventilation and air condition HVAC systems should be provided by unit system serving only one or two floors. Central air system serving 10 or 20 floors creates shaft ways and duct systems that penetrate fire rated floors walls partitions and ceilings. Smoke spreads throughout ducts of central HVAC systems.
The high rise building framework should be skeleton steel framing not center core steel column framing. There should be no bearing wall high rise construction. Reduce the size of open floor design.
Increase the thickness of concrete in floor construction. The two or three inches of concrete over corrugated steel fails during most serious high rise fires and must be replaced.
Automatic sprinklers should protect all high rise buildings. Firefighters can extinguish approximately 2,500 square foot of fire with one hose line. Two hose steams may quench 5,000 square feet of fire. The World Trade Center floor areas were 40,000 square feet in area.
Federal, State and Port Authority buildings should comply with New York City building codes and actually in some cases should exceed them. Remember building codes are only minimum standards.
originally posted by: neutronflux
a reply to: bobw927
No evidence of a plane at shanksvill, a lie.
So believe you as a complete stranger?
Or believe the civilians that attest to flight 77 flying overhead to its crash site and the explosion. The 1400 individuals that attest to recovering human remains, wreckage, the trees burt by jet fuel, remains, wreckage, and personal effects in a large debris field and in tree tops. The DNA testing that confirmed the crew and passengers ended up at shanksville, and the families that received the remains for burial. An event backed by radar data and flight controllers?
originally posted by: Salander
originally posted by: neutronflux
a reply to: bobw927
No evidence of a plane at shanksvill, a lie.
So believe you as a complete stranger?
Or believe the civilians that attest to flight 77 flying overhead to its crash site and the explosion. The 1400 individuals that attest to recovering human remains, wreckage, the trees burt by jet fuel, remains, wreckage, and personal effects in a large debris field and in tree tops. The DNA testing that confirmed the crew and passengers ended up at shanksville, and the families that received the remains for burial. An event backed by radar data and flight controllers?
There was no wrecked airliner in that field or the woods next to it, and everybody there agreed.
originally posted by: neutronflux
a reply to: turbonium1
So, just ignore:
It's basic engineering that exceeding load limits and ratings cause failure. Greater the magnitude of the over loading, quicker and more catastrophic the failure. Your rant about repeatable science is BS. Floor load capacities are based on modeling, studied characteristics of material, and engineering best practices from past buildings failures.
I gave examples where buildings have collapsed from being overloaded.
The Meridian Windsor steel structure had complete failure above the 17th floor because of fire.
The Plasco high rise was a steel structure failure and collapse because of fire.
Dust generation at the WTC was not abnormal for a fire / gravity collapse as proven by videos of buildings that collapse during earthquakes. Also, videos of building implosions show charges setting off cause little dust creation.
The WTC towers floor system fell at 2/3 reds the rate of free fall.
Large lengths of the WTC core columns were left standing ofter the floor system collapsed, and fell at 40 % the rate of free fall.
What is your evidence for CD again?
All the proof for CD's is found in the videos, and images, of the collapses.
originally posted by: MrBig2430
originally posted by: Salander
originally posted by: neutronflux
a reply to: bobw927
No evidence of a plane at shanksvill, a lie.
So believe you as a complete stranger?
Or believe the civilians that attest to flight 77 flying overhead to its crash site and the explosion. The 1400 individuals that attest to recovering human remains, wreckage, the trees burt by jet fuel, remains, wreckage, and personal effects in a large debris field and in tree tops. The DNA testing that confirmed the crew and passengers ended up at shanksville, and the families that received the remains for burial. An event backed by radar data and flight controllers?
There was no wrecked airliner in that field or the woods next to it, and everybody there agreed.
This is you repeating an proven lie.
I've provided an eyewitness to the plane crash elsewhere. He SAW the plane plow into the ground and SAW debris go flying.
I provided an eyewitness- an arborist - that spent days picking plane parts and body parts out of the trees.
You are a proven liar.
I can provide links and quotes to anyone that asks.
originally posted by: Salander
Prove that UA93 crashed there in PA.