What is the 4 to 1 Rule When Using a Ladder? - Why you Should Use it!
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Flagging Direct on X: "When using an extension ladder, be sure to set the ladder at the correct 4:1 angle. See more ladder #safety tips at: https://t.co/NmOshKy9E7 https://t.co/xeVYkRvh7K" / X
HVACR Tips: Ladder Safety | 2013-06-10 | ACHRNEWS | ACHR News
Ladder Angle: What is the '1 in 4' Rule?
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8.5FT/2.6M Telescoping Ladder Multi Purpose Stainless Steel Telescopic Extension Ladders with Spring Load Locking Mechanism Non-Slip Safety Lock ...
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