What Door Is Right for My SCIF?

One of the most critical components of a SCIF build is the point of entry. Getting it right can make or break the security and functionality of your facility. Having a general understanding of common terms and requirements early on can help streamline the submittal process and keep your project on schedule. SCIF doors often have the longest lead times of any component, which means delays in specifying and ordering them can significantly impact the timeline and delivery of your project.

Some of the key topics we’ll touch on include TEMPEST, Sound Transmission Class (STC), hardware, and overall door construction.

TEMPEST Mitigation
Determining whether your SCIF door requires TEMPEST mitigation is essential for accurate quoting, maintaining timelines, and choosing the right door materials. While it may seem like a niche concern, this information is typically available from your government sponsor or Accreditation Official (AO).

One of the most common TEMPEST requirements is 60dB of attenuation. While many SCIF door manufacturers can meet this standard, understanding the specific frequency range that your door must attenuate is not always straightforward. This information should come from your Certified TEMPEST Technical Authority (CTTA) or AO, and it plays a crucial role in proper SCIF construction.

Sound Transmission Class (STC)
Another important requirement is the door’s Sound Transmission Class rating. Whether using Sound Group 3 (STC 45) or Sound Group 4 (STC 50), these ratings are used in nearly all Type 2 or Type 3 SCIFs. Ensuring your door meets the required acoustic specifications is a key part of compliance and performance.

Hardware Requirements
The locking system, as outlined in the IC Tech Spec, is also a major consideration in SCIF door procurement. For the primary SCIF entry point, certain hardware is mandatory:

• A GSA-approved deadbolt lock meeting Federal Specification FF-L-2890
• A combination lock meeting Federal Specification FF-L-2740

These components form the basis of a compliant locking system.

Construction and Size Considerations
Door size and function also impact cost and lead time. One of the first questions we ask is: “What is the size of the largest piece of equipment that will need to enter the SCIF?” This quickly determines whether you need a standard man door or something larger—such as a double-leaf 6-foot-wide door with a removable mullion for equipment access. These choices affect cost, construction, and schedule.

Conclusion
Knowing your door means understanding your program. The more clearly you can relay this information to your SCIF builder, the smoother the procurement and construction process will be. Confirming door specifications early in the design phase helps avoid costly delays and keeps your project on track for timely delivery.