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■■■Sloped piping supports angle of deflection (fitting tolerance) on femalefittings only. AoD values added to male pipe fittings will be ignored butmight still cause unexpected results.Upgrading a grooved elbow to a grooved tee in a vertical sloped conditionmight cause the tee to become disconnected from existing equipment.Editing a male-female pipe run using grips might cause a disconnection.■ Connecting pipes through external references (Xrefs) located at a non 0,0coordinate might not connect correctly.■Blocks containing a donut object might cause unexpected results whenused for single-line pipe connector graphics.Parallel Routing — Conduit and Pipe Runs■Drawing parallel conduit or pipe runs with different elevations or fromvertical segments might cause undesirable results when changing the Zdirection (elevation). As a workaround, avoid changing the elevation duringparallel routing, or begin from a group of vertical segments and routehorizontally. The specified elevation will apply to all selected objects.MiscellaneousMvParts■Multi-view parts (MvParts) that do not contain any connectors will behaveas if they are at elevation 0 regardless of their actual elevation. To resolve,add a single connector to the part definition.Cable Tray Fittings■In some cases, cable tray fittings will not be displayed with an open facein isometric views.Length of Ducts and Pipes■ The cut length of a duct or pipe segment must be less than 1,000,000inches.8 | Chapter 1 AutoCAD MEP 2012 Readme