Sleeve and Penetration Schedule Guide

How to review sleeve and penetration schedules for location, size, trade ownership, firestopping, structural openings, and installation sequence.

Technical GuideMay 20, 2026

A sleeve or penetration schedule lists openings needed for pipes, ducts, conduits, cable tray, and other services passing through walls, slabs, beams, decks, and rated assemblies. It is most useful when every opening can be traced to a drawing location and trade owner.

The review goal is to confirm that openings are complete, correctly sized, structurally acceptable, and coordinated with firestopping before concrete, masonry, or framing work makes changes expensive.

Items to Check

Start by matching each schedule row to a plan mark, elevation, detail, and system route. Then verify that the opening size accounts for pipe outside diameter, insulation, movement, firestop system, sleeve material, and installation tolerance.

Opening mark, sheet reference, grid location, and elevation.
Trade owner and system served.
Sleeve or blockout size, shape, material, and fire rating.
Structural review for openings through beams, walls, slabs, or decks.
Firestopping, waterproofing, acoustic, and smoke-seal requirements.

Common Problems

The most common sleeve errors are missing openings, openings placed from stale routing, sleeves that do not account for insulation, and penetrations through rated assemblies without a compatible firestop detail.

A good schedule is not just a list. It is a coordination record that connects layout, structure, MEP routing, and life-safety performance.

Frequently Asked Questions

How should a sleeve be sized for an insulated pipe?

The opening has to account for the pipe outside diameter plus insulation thickness, movement, the firestop system, sleeve wall thickness, and installation tolerance. A sleeve sized to bare pipe diameter often will not accept the insulated line, which forces field cutting. For chilled water or refrigerant lines, insulation can add an inch or more of radius, so the schedule dimension should reference the insulated condition.

When does a penetration need structural review?

Openings through beams, load-bearing walls, slabs, and metal deck can affect capacity, so they should be checked against the structural details and reinforcement notes. Beam web penetrations usually have restricted zones and maximum diameters set by the engineer. Cutting an unreviewed hole in a stressed element is a common source of field RFIs.

What firestop information belongs in a penetration schedule?

Each penetration through a fire-rated assembly should reference a tested firestop system that matches the assembly rating, the penetrant type, and the annular space. ASTM E814 (UL 1479) tested systems are identified by an F-rating and a T-rating. A schedule that lists the opening but not a compatible tested system leaves the installer to guess.

Why do penetrations get missed on 2D drawing sets?

Openings come from many disciplines and land on different sheets, so a route drawn on a mechanical plan may never generate a matching structural opening or architectural firestop detail. Stale routing is another cause: the pipe moves but the old sleeve mark stays. Tracing each schedule row to a plan mark, elevation, and system route catches most of these.

What is the difference between a sleeve and a blockout?

A sleeve is a pipe or formed insert cast or installed to create a clean opening for a penetrant, while a blockout is a formed void left in concrete or masonry to be filled or penetrated later. Blockouts are common for large or grouped penetrations where a single sleeve is impractical. Both need location, size, and firestop coordination.

MG

Manas Gandhi

Co-founder & CTO, Helonic

Manas is the co-founder and CTO of Helonic, where he leads engineering and AI research for construction drawing analysis. He works directly with structural, MEP, civil, and fire protection engineers to translate the way they review drawings into AI systems that flag the issues that actually matter in the field. Before Helonic, he built machine learning pipelines for technical document understanding and has spent the last several years interviewing licensed design engineers and discipline leads to ground product decisions in real practice rather than industry assumptions.

Areas of focus

AI for technical document understanding
Cross-discipline coordination workflows
Code compliance automation (IBC, NEC, NFPA, IPC, IMC, ASCE)
Structural and MEP drawing review systems

How this page was researched: Penetration and firestop review points were checked against IBC Chapter 7 fire-resistance requirements and ASTM E814 (UL 1479) through-penetration firestop test methods. Examples reflect the sleeve conflicts Helonic most often flags when comparing penetration schedules with structural, MEP, and rated-assembly drawings on 2D sets.

Last reviewed by Manas Gandhi · May 2026

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