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Structural Considerations for Greenhouses to Prevent Snow Damage

GreenhouseImage Credit:
extension.org

A significant problem for nurseries during the winter season is the damaged caused to greenhouses and equipment during snow storms. As snow builds up on a greenhouse, it begins to put tremendous pressure and weight on the structure. Eventually, if the structure is not set up properly, this weight will take its toll and crush the greenhouse leaving the business owner to deal with the costly task of fixing the damage to equipment, the structure, and the plants inside the structure

Take the following real life case from 2009 as an example of the high costs snow damage can cause:

Oregon nurseries say winter storms have done a number on some greenhouses, and the damage to plants wont be known fully until spring.

The Oregon Association of Nurseries says that at a seedling operation in Molalla, more than a foot of snow and ice crushed 72 of 84 greenhouses. Another operator estimated structure and equipment loss at more than $1 million.

Claims Journal

Preventive measures can be taken when designing a greenhouse to help manage this risk. When building a greenhouse, be sure that foundation posts are large enough to support the weight of the building and that the greenhouse has diagonal bracing. All post connections should have the proper bolts and screws reinforcing them. When building individual greenhouses next to each other, be sure toleave around one foot of space between individual greenhouses. This will help prevent the sidewalls from collapsing in as snow accumulates.

After the greenhouse is properly built, there are still preventive measures to put into action. Any cracked or broken glass that is noticed should be replaced immediately. The heating system should be turned on and should maintain 60 degrees Fahrenheit and energy screens should be retracted in order to melt the snow away. It is also critical to have a standby generator available in case of a power outage occurring during the snow storm.

Designing a greenhouse properly and taking the correct steps prevent snow damage will reduce business risk for the business owner and save them from some financial trouble.

For more information on greenhouse growers insurance and risk management, visit GrowPro..

Plumbing Risks: Gas Explosions

Gas ExplosionImage Credit:
abclocal.com

Common practice used by plumbers when purging gas lines has always been to open the gas valve and, once they smell the familiar scent of gas, shut the valve off. But what if the gas has lost its odor? Then simply relying on the ability to recognize the smell of gas proves to be a dangerous and risky practice.

In 1937, after a deadly explosion at a Texas school, a law was passed to add a chemical to natural gas that would give it that rotten egg smell that has become the tell tale sign that there is gas present in the air. What is not common knowledge is that this odor can fade and even disappear because the steel and plastic piping can absorb the odor. This is known as “natural gas odor fade”. Without the ability to smell the gas, a plumber may purge a gas line before connecting a fixture allowing odorless gas to fill up an enclosed space and mix with the air. This mixture has the potential to cause a serious explosion.
To help mitigate the risk of a gas explosion occurring, remember:

  • NEVER rely on your sense of smell alone to detect the presence of natural gas.
  • ALWAYS use gas detection equipment during purging or when working on or around gas piping systems, i.e., combustible gas detector.
  • Be aware of other signs of a gas leak besides the smell: a hissing, whistling or roaring sound near a gas appliance or pipeline; a damaged connection to a gas appliance.
  • Make sure to purge gas lines in a well ventilated area, never into an enclosed space.

Pacific Gas and Electric Company

Outside of the obvious risk of injury to the plumber that a gas explosion would cause, explosions can cause serious injury to the customer and serious structural damage to the building or house, leaving a business owner opened to some severe claims being filed against them. Following the above guidelines and understanding that using only the sense of smell to detect gas is a dangerous practice, will reduce the chance of a gas explosion occurring which will result in less business risk for the business owner.

For more information on plumbing insurance and risk management, please visit PlumbingPro.