This type of companion step or ship type ladder provides an improved means of access over the normal single run ladder when space is available.

The 65 degree to 75 degree slope is easier to negotiate than a vertical or near vertical ladder.

We recommend that the maximum vertical rise should not exceed 3000mm and the width between stringers should preferably be between limits of 450mm and 550mm.

It should be noted that 250mm minimum foot space should be allowed from the nose of treads to the wall, platform face or other obstruction, see illustration. A top tread should be provided at floor level, or the platform can be arranged to run over, but the minimum foot space should still be maintained. Handrails are necessary on this type of ship type ladder and should be provided on both sides without exception.

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