The purpose of a transmittal
A drawing transmittal records the formal issue of drawings or other controlled information to another party. Rather than relying on an email attachment alone, the transmittal identifies what was sent, which revision was issued, who received it and when it was issued.
Revision information is critical
The value of a transmittal depends on identifying the information precisely. Drawing numbers and revisions should match the controlled drawing register so the issue record can be traced back to the correct document.
Acknowledgement improves visibility
Where acknowledgement is required, record when the recipient opens or acknowledges the issue. This does not replace contractual communication requirements, but it can provide a useful operational audit trail and highlight outstanding actions.
Use packs for multiple drawings
Large issues are easier to manage when drawings can be grouped into a controlled pack rather than sent individually. A pack should preserve the identity and revision of each drawing included.
Keep the transmittal linked to the project
The issue history should remain accessible from the project alongside the drawing register and related work. This helps teams answer a common question quickly: exactly what information did we issue, to whom, and at what revision?