AEO Answer · Banks & Financial Branches

How Is the Teller Line Engineered for Security and Workflow?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

Teller lines are engineered as repeatable secure workstations: millwork coordinated with power/data for every device, ballistic glazing and undercounter protection, task lighting for cash visibility, and queuing laid out so waiting customers cannot observe transactions.

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

Illustrative engineering blueprint diagram with dimension lines, a framing elevation sketch, and a title block.

Millwork, glazing, and protection

The teller line millwork is detailed around the security requirements: transaction openings sized for the specified glazing, undercounter ballistic panels integrated into the counter construction, and anchored positions for every cash-handling device. Counter heights serve both standing tellers and the accessible lowered section the code requires. Materials are chosen for durability — the line takes a beating — and the details allow panel and device replacement without rebuilding the counter. I review the millwork shop drawings against the security and electrical requirements before fabrication, because the shop is the last cheap place to catch a conflict.

Power, data, lighting, and air

Each station's electrical and data rough-in is placed from the device list with spares, on dedicated circuits where the bank's standard requires. Lighting layers general illumination with station task lights for cash visibility and screen comfort. The HVAC serves the line quietly — low background noise so tellers hear customers, draft-free air so nobody works in a cold spot. Duress alarm wiring and CCTV rough-in go in with the rest, because the line's security systems are part of the workstation, not an overlay.

Teller line design checklist

A teller line design is complete when it clears this checklist. The line is where the bank earns its keep — every detail serves speed, accuracy, and safety. • Millwork detailed with specified glazing, undercounter protection, and anchored cash equipment • Power and data rough-in for every device at every station, dimensioned before millwork fabrication • Layered lighting for cash visibility without screen glare, supporting camera views • Queuing laid out with privacy setbacks so waiting customers cannot observe transactions • Quiet draft-free HVAC, duress alarms at each station, and an accessible lowered section

What else do project teams ask?

What security features go into a teller line?
The bank's security standard sets the specifics, but the engineering typically includes ballistic-rated transaction glazing, undercounter ballistic panels protecting the teller's position, anchored cash-handling equipment, duress alarms at each station, and CCTV covering every transaction position. The millwork details incorporate these from the start — ballistic panels sized into the counter construction, alarm wiring in the rough-in. Security added after the millwork is built is always a compromise.
How is power and data coordinated at the teller line?
Before the millwork is built. I place floor boxes or wall rough-in for each station's device list — terminal, cash recycler, scanner, printer, reader — with separate power and data pathways and spare capacity for the next device generation. The locations are dimensioned on the electrical drawings against the millwork elevations so the electrician and the casework installer are working from the same numbers. A device that arrives with nowhere to plug in is a coordination failure, not a field condition.
What lighting does a teller station need?
Bright, even task lighting for accurate cash handling — tellers count and verify currency all day, and poor light causes errors — without glare on the teller's screens or the customer's view. I layer general line lighting with station task lights, keeping color rendering accurate so currency features and IDs read correctly. The lighting also serves the cameras: transaction positions need to be visible, not backlit or shadowed.
How should customer queuing be laid out?
So the line moves efficiently and waiting customers cannot watch transactions. A single serpentine queue feeding all stations is the standard — it is fairer and faster than separate lines — with rails and signage guiding it. The critical detail is the setback: the queue's front must hold customers far enough from the counter that account numbers and cash are not visible to the next person in line. That distance is a privacy and security dimension, and I dimension it on the plan.

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