Planning & documentation
Coordinating Steel Building Shell and Tenant Improvement Work
Define shell-to-tenant improvement boundaries for steel building interiors, services, openings, conditioning, and occupancy review records.
Define the condition and its scope
Shell acceptance and readiness for tenant operations are different coordinated milestones.
Coordination connects the steel package to the rest of the building. Red iron framing, cold-formed infill, foundations, doors, roof equipment, and interior finishes can each have a different document author. A correct component can still arrive with an unresolved interface. Establish which issued drawing governs each condition, how questions reach the responsible professional, and where responses are recorded. Separate a contractor's field measurement from a designer's acceptance of that measurement, and keep both available to the people preparing fabrication or installation documents.
References: Commissioning documents: process, contents, and acceptance · Project Planning Guide
Gather the inputs before deciding
Define where shell work ends and tenant work begins at partitions, services, openings, equipment, and conditioned zones. Compare the tenant's actual operations with the shell design assumptions. Identify which existing details and approvals cover the initial shell only. Ask responsible designers and authorities to evaluate the additions. Do not let a lease description substitute for the technical information needed to coordinate loads, enclosure, and occupancy.
- Shell completion boundary
- Tenant equipment and partitions
- Services interface locations
- Occupancy review responsibilities
References: Commissioning documents: process, contents, and acceptance · Project Planning Guide
Set observable handoff deliverables
Tenant equipment or partitions can change assumptions made during shell-only design.
| Input | Evidence to keep with it | Review status |
|---|---|---|
| Shell completion boundary | Shell scope completion record | Identify reviewer and written decision |
| Tenant equipment and partitions | Tenant layout and equipment narrative | Identify reviewer and written decision |
| Services interface locations | Coordinated interface and review matrix | Identify reviewer and written decision |
Sequence review and release
Collect the tenant layout and equipment information before interior procurement. Overlay the proposal on shell and service records and locate conflicts. Route technical and authority questions through the responsible team. Establish accepted interfaces and the sequence for tenant access, shell completion, and inspections. If work begins in stages, document the boundary and conditions of each stage rather than assuming shell acceptance authorizes all interior construction.
- Locate shell completion boundary in the current record.
- Compare tenant equipment and partitions with the table's evidence.
- Document the decision: Define shell and tenant review boundaries before interior procurement.
Worked project coordination example
A shell lease later includes a conditioned office and mezzanine concept. The handoff identifies what the shell documents cover and routes the tenant additions for separate coordinated design and authority review.
Apply the stated release decision to the case: Define shell and tenant review boundaries before interior procurement. The responsible team determines acceptance for the actual project and records any condition that still requires resolution.
Keep a closeout record another team can use
Provide separate shell and tenant record indexes with their accepted interfaces clearly linked. Include installed equipment, altered openings, conditioning boundaries, and relevant use decisions. Identify remaining landlord or tenant obligations by party. Later occupants need the combined existing-condition record, not just the original shell brochure. Preserve changes that affect future maintenance or renovation so the tenant fit-out is not mistaken for part of the initial structural package.
For this issue, include coordinated interface and review matrix in the handoff. If review remains pending, identify the dependent work and its owner; do not present the record as a completed technical acceptance.
Common questions
Does shell approval permit any tenant activity?
No. Proposed operations and alterations need project-specific review.
How should shell completion boundary be documented?
Define shell and tenant review boundaries before interior procurement. Retain shell scope completion record and check that the decision reached the team performing the dependent work.
Sources & further reading
Use the current documentation for the exact product and project. Source links do not imply a partnership or endorsement.
- Commissioning documents: process, contents, and acceptance Whole Building Design Guide
- Project Planning Guide U.S. General Services Administration / WBDG
Prepared with AI assistance. Linked references require current project-specific review. How these guides are prepared.
Prepare a supply inquiry
- Record the project drawing or detail and the specified product, profile, or system.
- List the complete configuration, physical units, quantities, and cuts per piece.
- Request current manufacturer documents; confirm compatibility, price, and availability before ordering.
- Obtain the responsible professional's review for loads, code requirements, or installation.