I had posted some photos with a PVC pipe hive stand. I felt it only fair to provide you all with an informed point of view in order to put to rest some doubts.
Here are the stands:
PVC Hive Stand 3.jpg
The Effects of Sunlight Exposure on PVC Pipe:
Occasionally we get questions about the effects of sunlight exposure on PVC Pipe and Fittings. We have put together this information to help answer some of those questions.
The sun emits visible and non-visible radiation. One component of non-visible radiation is ultraviolet (UV) light. Like many other substances, PVC plastics are affected by exposure to UV radiation.
The exposure of PVC to the UV component of sunlight causes PVC molecules in the first .001" to .002" of exposed surface to become permanently converted to a complex structure typified by polyene formations. The result is a brownish discoloration; often called "UV discoloration", "UV degradation", or more commonly "sunburned". UV discoloration does not occur where PVC is not exposed to sunlight, and ceases when exposure ends.
The discoloration process is time-dependent, and can be slowed with the addition of UV absorbers in the PVC compound. The most common additive used for this purpose is titanium dioxide, which also functions as a pigment.
Research has been done to determine the effects of long-term (two year) sunlight exposure on PVC pipe (see "UNITR-5: The Effects of Ultraviolet Aging on PVC Pipe", by the Uni-Bell PVC Pipe Association.) Other than visible discoloration, the following summarizes the results on pipe physical properties:
Physical Property - Performance Characterstic - Effect of Sunlight Exposure
--- Impact Strength - Impact Resistance - - Decrease
--- Tensile Strength - Pressure Capacity - - No Effect
--- Modulus of Elasticity - Pipe Stiffness - - No Effect
Research indicates that the sole performance characteristic adversely affected by sunlight exposure to pipe is impact resistance (the ability of the pipe to withstand a rapid external force or violent contact). UV discoloration does not effect the pressure capacity of the pipe, or the pipe stiffness (external load capacity).
The degree to which impact strength is affected by sunlight depends upon a number of variables, including: time of exposure, climatic conditions, diameter of pipe, wall thickness of pipe, and type of PVC compound used. The thicker the pipe wall, the more unnoticeable the effect becomes. Care may be required when handling thin wall pipe to avoid impact or breakage, but once the pipe is installed however, there will be no effect on the pipe's pressure capacity, or external load capacity.
For permanent above-ground PVC Pipe and Fitting installations, it is recommended that the pipe and fittings be protected from sunlight exposure. This can be accomplished by wrapping the pipe and fittings with an opaque material, or more commonly, by painting it. If pipe or fittings are to be painted, a water-based latex paint for exterior use is recommended.
NACO PVC Fittings: PVC Sewer Fittings, PVC Schedule 40 & 80 Fittings, PVC PIP Fittings, PVC IPS Fittings, PVC Heat & Air Fittings, PVC Agricultural Fitting, PVC CIOD (C900) Fittings, and PVC Industrial Fittings.© 2013 NACO Industries
By painting the PVC with paint designed for plastic (Valspar), which I did, it provides a1.8 mils thickness per coat of protective paint when dry. With two coats, that is over .003” protection against the UV radiation. A mil is one-thousandth of an inch; 1,000 mils equal 1-inch. It’s a linear measurement.
Definitely WOULD trust it. For all the pessimists, skeptics, and doubters; check this out:
Hive Stand Car 1.jpgWHOA!
And, just so you know what kind of car we're looking at;
Hive Stand car 2.jpgWhat the . . . !
And, so you know there is no Tom Foolery going on;
Hive Stand car 3.jpgWell I'll be . . .
Seeing is believing. Eventually I will test out the other concerns. Make sure you read the previous post about PVC studies.
GREAT JOB KEVIN INGLIN of Bee Keepers Corner!
Unless someone stole it in the night, there is an engine in the car. I drive it to work ever day. According to the factory specs for this year of car, it weighs 4137 lbs. If you divide that by four it means there was roughly 1034.25 lbs on the hive stand.
I was totally impressed. The stand didn’t budge, crack, squeak or bend. It is as solid after as it was before I set the car on it. I have an urge to lift the whole side of the car and set it down on the stand. But, I have proved my point, so I think I will forgo the work.