It's important to remember that fall protection is only as good as its anchorage. It doesn't just matter how well trained personnel are, how good the equipment is or whether or not the employee tied off correctly. If the anchor point fails nothing in the system will work.
Structural Requirements:
All anchor points for personal fall arresst and positioning systems must meet minimum structural requirements. There are different requirements depending on the approach the company takes in selecting anchor points.
The following are the minimum structural requirements for anchorage points:
1) All anchorages must be capable of supporting without failure an impact load of 5,000 lbs.
2) The anchorage must be able to support two (2) times the maximum intended impact load. A qualified person must determine this.
3) For positioning systems all anchor points must be able to support 3,000 lbs. without failure.
engineered Anchor Points
To determine the two times intended impact load for anchorages an engineer or qualified person determines the impact load of a fallen employee, and ensures the anchor will support twice the load. For example, if the engineer determines that the maximum impact load that the fall will create is 1,4000 lbs., and then the anchor point must be capable of supporting 2,800 lbs. This is a safety factor of two (2), which OSHA finds acceptable.
you using factory supplied Fasteners??
Yes, in most cases you do need to make sure what you are anchoring to with a Personal Fall Arrest System or PFAS can withstand a 5,000 lbs. static load. What I find that most contractors do not think about is whether or not their employees are using factory approved fasteners.
is this important?
The Environmental Protection Agency (EPA), issued a mandate to stop producing CCA-treated lumber for residential construction. CCA stands for Chromated Copper Arsenate, which is a wood preservative that contains Arsenic, which is known carcinogen (cancer causing). As a result, lumber manufacturers are providing "new" wood treatments.
This change is a great improvement in ensuring the health of our families, but the "new" chemical treatments for lumber are a cause for concern when it comes to the use of fasteners wtih anchor points. The drawbacks to these environmentally safer wood treatments is that they are more corrosive to unprotected metal fasteners, in fact five times more corrosive to common steel according to teh American Wood Preservers' Association. This includes steel fasteners.
Electrogalvanized nails are not suitable for use with the "new" formulations due to the higher corrosion. Industry experts now recommend the use of hot-dipped galvanized nails, stainless steel products, or polymer-coated fasteners. This is why it is extremely important to use factory approved fasteners only.
Guardian uses only hot-dipped galvanized fasteners or stainless steel fasteners.
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