Positioning Stairs and Ladders Using Reference Points

To create a new stair or ladder, it is possible that it will not be positioned exactly where the user wants it at the first attempt. Unless the user calculates the required origin (at the bottom) and dimensions very carefully, it is likely that the handrails at the top of the stair/ladder is not correctly aligned with the handrails on the platform to which it gives access.

To provide a quick way of positioning stairs and ladders correctly, Design calculates a Reference Point at the top of such items that the user can position at any p-point on the adjoining platform. This makes sure that, even though the p-point may not be at the required location for the stair/ladder, the alignment of handrail components is ensured. It is then a simple matter to move the stair/ladder parallel to the side of the platform, for example, use the Position > Relatively (By) until it is in the required position.

To use the above technique, proceed as follows:

1. Make sure that the CE is the stair/ladder whose position is to be adjusted and then select Position > Reference Point.

   The user is prompted to ‘Identify floorplate’.

2. Using the cursor, pick the floorplate to which the top of the stair/ladder is to give access.

   The user is prompted to ‘Identify P-Point to position structure’.

3. Using the cursor, pick any p-point on the side of the platform against which the stair/ladder is situated.

4. Unless the user happens to want the stair/ladder exactly at the p-point position (only likely if this is at the center of one side rather that at a corner), use the Position > Relatively (By)… option to move the stair/ladder along the side of the platform by the required distance.