What Gets Released First
The standard phased release sequence follows structural dependency — the pieces that must be in the ground or in the air first get detailed first.
- Anchor bolt plans — always first; allows concrete work to proceed
- Column base plates and heavy column packages — required early for mill order on wide-flange heavies
- Primary framing by bay or floor — sequenced to match the erection crane picks
- Secondary framing and connections — follows primary release
- Miscellaneous steel — stairs, handrails, platforms, embeds — typically released last
How Release Sequences Are Planned
A phased release plan should be established before modeling begins — not improvised as deadlines approach. The detailer, fabricator, and PM should agree on package definitions (which members are in each release), planned release dates, and what information must be in hand before each package can be issued. If anchor bolt locations depend on a foundation revision not yet issued, the anchor bolt release cannot happen until that revision is received and incorporated.
Risks of Phased Releases Without Coordination
The primary risk is connection incompatibility between phases. If primary framing is released before secondary framing is modeled, connections to secondary members may be assumed and later found to be incorrect. The best practice is to model the entire structural scope before releasing any packages — then release in sequence from the completed model. This way, every released package is compatible with every future package.