Hi Jean, that's a very objective aproach to conceptual process. Of course I think on such thing as space between table and wall and my stairs do have to fit somewhere there, but won't you need to bring some emotion to space someway along the process? I mean a room can be very small or very large you can even have a table folding from a wall. Eventually, with experience you know what is a fair size to have on a living room and a dinning room and so it all has to have some other kind of aproach to make things original... So wouldn't you think that a conceptual aproach shouldn't be that limited by those dimensions? My architectural aproach has not to do with bricks, tiles or tables, but it's about the meaning and feeling of a place. I guess that's why in architecture the opposite is also true.

The plugin on 1001 bits is nothing to do with me. This one is freeware, not a trial: http://www.freesketchupplugins.co.uk/springtool.php

Hi, lexje, There are plugins that can help you with staircase building, like http://www.1001bit.com/products/products.shtml There is also the stairmaker plugin somewhere on the Ruby Library Depot http://www.crai.archi.fr/RubylibraryDepot/Ruby/en_arc_page.htm You can set the radius, bulge distance and the number of segments in the Value Control Box.

I'm in the process of making a plugin that will allow you to create highly customizable curved or spiral staircases. Click on the link below for more information. http://www.freesketchupplugins.co.uk/spiral_staircase.php