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Friday, 1 January 2010

01.1 Analysis of full height glass partitions

I thought I'd start off with something simple and that has a nice mix of 3D & 2D. Full height glass partitions, initially they look quite simple to do but the more you look into the detail the more expanded the subject gets, in terms of components and interaction between components.

3D Section through full height Glazing & Section of head and base glazing channel

General work practice for this is to build a glass wall type or curtain wall type that goes up to the underside of the ceiling and accompanying this will be a 2D drafting view ‘typical wall type section’. This gives your model and plan quick definition and the 2D section gives the contractor detailed instructions. What it doesn’t do is indicate the possible clashes above the ceiling with lights & ducts crossing the wall or running parallel to the wall and clashing with the diagonal bracing that is holding the top glazing channel stiff in place. If we study the detail we can avoid these problem on site or in the field. Bear in mind that we only want to model the most important parts ,not all the part as this will bog down your model.

Typical practice, curtain wall to ceiling height and accompanying 2D section

So the next step is, when you look at the 2D section detail which part should be 3D modelled and which part should be 2D drafted. The easiest way of doing this is to break it down into a list of all the components. First examine the detail and identify the full object list, both 2D & 3D.

Note 1 - See chapter 01.3 Advanced modelling for details on bracing
Note 2 - Recommended host for door is #6 wall adjacent not #4 glass wall (curtain wall). See chapter 01.5 Extras for detail about door
Note 3 - For rendering purpose these could be modelled as a curtain wall mullion so that they appears in the rendering.
Note 4 - For students learning the top channel is always larger than the bottom channel, this is to allow the installer of the glass panels to tilt the glass panel, insert it in the top channel, then tilt or straighten it up and then drop it down into the bottom channel.

Note 5 - The shims are for levelling out, aligning vertical joints and rotation of the panel within the bottom channel. In some cases the floor is not level across the whole length of the bottom channel making the channel un-level which is not a good base for the glass to sit on; the shims sort this problem out.

In this case we need to model the partition above the glass and also the diagonal bracing along with the standard components. The method used to break down the detail can be used across all different types of detailing and will be regularly seen in future blogs.


Now that we know all the key ingredients of the detail we can move forward to the modelling stage. See the next post 01.2 - Primary (basic) modelling for details on the floors, walls & ceilings modelling techniques.

1 comment:

Anonymous said...

More information on glass partitioning