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SAFETY MESSAGE

There are a number of choices  aboard vessels to access upper and lower levels.  They are as follows:
1.) A standard staircase.
2.) A modified staircase or ladder to an extreme of 60 deg. or less.
3.) A vertical ladder.

Given a choice, I  would  use an elevator.  Both  you and I know that when it comes to Offshore Vessels, this is generally not a choice with the exception of Cruise or extremely large vessels. The same mentality applies to full size stair cases.

Steep stairs or ladders are generally easier and safer to use than a vertical ladder to access upper levels, but remember  what goes up must come down.  When trying to negotiate a steep stair of around 60 degrees coming down in the forward position, at best there is enough tread space to accommodate your heal.  This is awkward and intimidating especially if you are trying to negotiate this while carrying items of any type.

Deck space is the issue in most cases.  That's why you will generally see steep stairs or ladders on board vessels.  This is why the Lapeyre Stair becomes a 4th option, giving you the benefit of a steep stair (up to 68 degrees) that offers a full foot print going up or down.  The mentality and benefits of the Lapeyre Stair is  strictly about safety.

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