Fun with Defpoints Layer

Ahh sorry, industry specific terms.

A "bundle pull zone" is the 3-dimensional area in front of heat exchangers that is reserved for pulling or cleaning the exchanger tubes. Nothing can be built in that zone or it would interfere with that activity, but the zone can be used for non-emergency accessways and temporary storage of mobile equipment.

A drop zone is a 3-dimensional envelope, usually next to or inside a structure, that is reserved for raising and lowering equipment from the ground to the different floors in a structure. (An elevator shaft is a "kind" of drop-zone)

Building 3dmodels of these zones on layer defpoints means they are always visible, but do not effect the plot, even when used as an XREF.

 

That's an interesting defpoints usage. The same principle could apply to the
space in front of electrical panelboards, for example, which can't be
obstructed, or for that matter to minimum widths along egress paths.

 

Yes the concept can be used for any "reserved" space, like access door swings, or hand clearances, or min headroom and the like. However, we avoid using layer defpoints in that manner for any but the most critical of "soft" envelopes or zones. If not used sparingly, it can result in a cluttered, hard to read model.

We have long desired some sort of layer function that will tie two layer together like layer defpoints is tied to layer 0. Some method of joining the display of two layers while one remains noplot. If one is frozen/off both are, and if one is thawed/on both are.

 

Layer Grouping with control <drool> and why stop at just a pair...

 

Not stopping with a pair, STARTing with a pair ;-)