Section 45 of 102
44. Clearances and Service Envelopes
Stable section ID: S05-CON-007-SECTION-45 · 47 content blocks
A Clearance is the minimum unobstructed distance required between Entities.
A Service Envelope is the volume required to install, operate, inspect, maintain, repair, release, remove, or replace an Entity.
Envelope types shall include:
installation envelope;
operating envelope;
movement envelope;
ventilation envelope;
thermal envelope;
inspection envelope;
tool-access envelope;
maintenance envelope;
removal envelope;
safety envelope;
emergency-access envelope.
Example:
service_envelope HVAC_Filter_Replacement {
entity: @HVAC_Cartridge_01;
purpose: maintenance;
- geometry: box(
- width: 700 mm,
- depth: 1200 mm,
- height: 900 mm
);
access_direction: negative_y;
must_remain_clear: true;
}
An envelope shall define:
host Entity;
geometry;
coordinate system;
applicable state;
occupancy rule;
permitted overlap;
temporary or permanent status;
access authority.
Some envelopes may overlap when their uses cannot occur simultaneously and the applicable operating rule manages the conflict.
Safety, emergency, and simultaneous-maintenance envelopes may prohibit all conflicting occupation.
BDL validation shall identify obstructions caused by:
Components;
finishes;
structural members;
utilities;
doors;
stored objects;
temporary construction;
other service envelopes.
Removal Envelope validation shall consider the complete extraction path, not only space immediately adjacent to the Component.