horizontal restraint on step over ladder 1

[M1Can]

I am looking at a step over ladder used to get over a conveyor ( top of walkover 50" from grade). Walk up one side , 2 1/2 ft platform on top and walk down other side.

My concern is whether it has to be restrained from overturning. The ladder is considered portable and get moved a little along conveyor.

If I consider the rail at the top as a guard , the rail can take the horizontal force but the ladder is narrow enough it would tip over. My customer thinks it is only required to be stable with a 25 lb force on the top rail ( he is trying to find a technical ref for this). Does anyone know where I can find any backup for what is required for this situation?

Thanks in advance

M1 Engineering

http://www.m1engineering.ca

 

[desertfox]

Hi M1Can

Can you provide a sketch or drawing for this so we can get a better understanding?

desertfox

 

[M1Can]

Sketch attached

M1 Engineering

http://www.m1engineering.ca

 

[desertfox]

Hi M1Can

I agree it looks tall compared with its width and I have never heard of it being stable for a maximum of 25lbf.
All I can suggest to start with is you calculate the centre of gravity position height wise and see what force you require horizontally to tip it over.
I think also that if its moveable it needs some lifting eyes to pick it up and move it it looks a bit big to be moved by hand.
If you have designed this to a code does that not give any loading for the handrail?

desertfox

 

[patprimmer]

Apart from any codes, I think due diligence requires that it be stable with the heaviest likely person leaning over one side. Maybe splaying the legs out at the bottom will be sufficient.

If it is used on hard level surfaces, maybe wheels to assist movement are appropriate.

Regards
Pat
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