General

Engineer Mode

Classic hides the stage sidebar: the toolbar keeps Ceiling Grid, Panels and Returns, and room classes are set in the room schedule. Yours alone — it doesn't change anyone else's screen.

Ceilings

Every panel is made smaller than its grid module by its fit offset (7/16" unless the panel says otherwise in the Engineering library). Keep: a cut panel keeps that clearance at the wall too, so it comes out the space it fills less the full offset. Tight: it is cut to run tight to the wall angle, so only its grid-side edges take their share. Sets every cut size on the Ceiling Map, its cut schedule and the optimizer. Shop standard — it applies to everyone in the company.

Where ceiling panels stop on a prefab: 0 runs them to the finished wall face, where the wall angle's gasket seals the edge. Enter a clearance if your detail holds the first tile off the wall. Applies to every grid on a prefab — by room and by structure — and to the cut sizes, the bill of materials and the 3D model. Shop standard — it applies to everyone in the company.

Modular walls

Those are shop standards — they describe the product this company builds, so they apply to everyone in it.

Segment length, pillar size and jamb channel gap are re-derived every time a drawing is drawn, so changing them updates existing modular drawings too.

Full panels only: wall runs are drawn in whole panels, so no cut panel exists, and doors and segments move along a wall one panel at a time. Yours alone, and also on the wall toolbar as Full Panels.

A run of wall rarely divides into whole panels, so one cut panel makes up the difference. This is which end of the run it goes to. "At the end of the wall" keeps full panels either side of a door or window and pushes the cut piece out to the corner instead. A door splits the wall into two runs, so each run still gets its own cut panel.

Engineering

Which form of Q = C × A × √ΔP sizes the offset needed to hold a differential. Both are in common use and they differ by about 53% on identical geometry — 4005 treats a gap as a fully open orifice and is the more conservative. Whichever is selected is printed on the airflow sheet, since the arithmetic can’t be checked without knowing it. Shop standard — it applies to everyone in the company, because two engineers on different coefficients print different required offsets for one drawing.

Return grilles are sized by noise, not by physics: 300–500 fpm across net free area is the normal cleanroom band, and past about 500 the NC rating starts to bite. This figure sizes every return on the sheet and is printed beside each one. Shop standard — it applies to everyone in the company.

Engineering documents

The unit settings below are yours alone: quoting a figure in cubic metres does not change the figure.

Which unit every printed air volume is quoted in — the room schedule, the spec sheet and the airflow sheet all follow this. Air changes per hour are unaffected; they are a ratio and read the same either way.

Display only. Pressure differentials are always stored in inches water column and converted when shown, so switching units can never alter a stored target. 0.02" w.c. ≈ 5 Pa.

The order sections appear in when you press Get data, set separately for modular and pre-fab drawings. The cover always comes first — it carries the contents list. A section the drawing has nothing for is skipped rather than printed empty.

Live view

The ICS mark, repeated across the client's screen at 45° and 30% opacity, on both the plan and the 3D model of a live view you share. Behind the drawing puts it in the background, so it never covers a line of the drawing or the model. Changes reach anyone watching straight away. Yours alone — it applies to the links you share.

3D model

As you orbit, the walls between you and the room turn see-through and the ones behind it turn solid again. This is whether that change eases across or happens in one step.