On Wednesday, June 5, 2019 at 12:38:45 AM UTC-4, Bill wrote:
DerbyDad03 wrote:

Stupid question: Is it intended that the user climb onto the
highest rungs? I'm guessing those are there so that you can
climb onto the sides of the base of the "regular part" of the
ladder, and use those rungs for "hanging on". What is correct?

According to OSHA Oregon, yes, it can be climbed.

https://osha.oregon.gov/OSHAPubs/3083.pdf

"Can the vertical extension section be climbed?

When approved by the manufacturer for this purpose, the extendable vertical
section can be climbed. Additional measures such as installing guy lines may
be required to ensure stability."

According to OSHA, once the vertical section extends at least 2 rungs above
the trestle it is no longer a step ladder.

This doc doesn't specifically say that you can climb the vertical section,
but it does at least allow you stand on the top step of the trestle portion.

https://www.osha.gov/laws-regs/stand...ons/2012-01-03


Thank you! That's quite a document on ladders you have there!
I have Paul Hasluck's classic book,"The Handymans Guide", which
explains how to make your own ladder. As I recall, it is
advised to use greener wood for the rails than the rungs! : )

Post a picture of yourself atop the 24' trestle extension ladder that you build
this weekend. ;-)