FireKing Classic Fireproof File Cabinet, 4-Drawer, 31" Deep for Letter Size Files (4-1831-C)

FireKing® Classic Fireproof File Cabinet, 4-Drawer, Letter Size, 31" Deep

The FireKing Classic 4-1831-C is a full-depth, four-drawer vertical file cabinet for organizations that need high-capacity protection for letter-size records. It combines UL Class 350 1-hour fire protection, a UL 30-foot impact rating, water-resistant construction, and a UL-listed Medeco® high-security key lock.

Its 31-9/16-inch exterior depth provides longer drawers and greater filing capacity than compact 25-inch cabinets. High-sided drawers accept hanging letter-size folders without additional frames, while maintenance-free suspensions, reinforced insulated construction, and a durable powder-coated finish support everyday use in demanding records environments.

Specifications

Why Choose the Classic 4-1831-C?

• Certified fire protection: Its UL Class 350 one-hour rating helps keep interior temperatures suitable for paper records during the rated fire exposure.
• Impact protection: The cabinet is rated to remain closed and continue protecting its contents after a 30-foot impact test.
• High protected capacity: Four 26-inch-deep interior drawers provide substantial storage for letter-size records.
• Water-resistant design: ETL verification addresses water exposure from sprinklers and fire hoses during fire response.
• High-security access control: A UL-listed Medeco key lock is standard, with combination and electronic upgrades available.
• Everyday filing convenience: High-sided drawers accept hanging folders, and maintenance-free suspensions support smooth operation.
• Durable construction: Reinforced gypsum insulation and a powder-coated exterior are designed for long-term commercial use.

Common Applications

Use the 4-1831-C to protect active letter-size records that must remain accessible in the office but would be difficult, expensive, or impossible to reconstruct after a fire.

• Legal, accounting, and financial records
• Medical and administrative files
• Human resources and personnel records
• Government and municipal documents
• Insurance, mortgage, and real-estate files
• Education and institutional records

Choosing the Right Fireproof File Cabinet

4-Drawer vs. 2-Drawer

Choose the four-drawer 4-1831-C when you need maximum protected filing capacity within a single cabinet footprint. A two-drawer model is easier to place in a private office or smaller records area and has a lower overall height and weight.

31″ vs. 25″ Depth

The 31-inch Classic provides longer drawers and greater filing capacity. A 25-inch-deep cabinet is better suited to limited aisle space, compact offices, and delivery routes with tighter turns.

Letter vs. Legal Size

The 4-1831-C is built for letter-size records. Choose a legal-size FireKing Classic model if your files are primarily 8-1/2″ × 14″; the legal cabinet is wider and requires additional floor and delivery clearance.

FireKing Classic vs. Patriot

Choose Classic for a UL-listed Medeco high-security lock, available lock upgrades, more finish choices, and a broader range of configurations. Choose Patriot for essential one-hour protection in a simpler, value-focused cabinet.

To compare other sizes and configurations, browse our complete selection of vertical fireproof file cabinets.

Delivery and Site Access

With an average shipping weight of approximately 603 lbs., the 4-1831-C ships by freight and requires delivery planning. Confirm truck access, receiving hours, doorway and hallway clearances, turning space, floor conditions, elevator capacity, and the final placement location before shipment.

• Loading-Dock Delivery: Best for commercial facilities equipped to unload and move the palletized cabinet.
• Liftgate/Curbside Delivery: The cabinet is lowered to ground level and left palletized for the customer to move inside.
• Lobby or Garage Delivery: The cabinet is moved into the first accessible covered area when site conditions permit.
• Full-Service Delivery: Includes movement to an approved final location, placement, and packaging removal when site conditions permit.

Residential delivery, stairs, restricted truck access, tight turns, long carries, floor protection, or other unusual site conditions may require additional review or charges. Standard freight service may use a 53-foot tractor-trailer. Contact Advanced Filing Concepts before ordering if you are unsure about delivery access.

Warranty and After-Fire Protection

The FireKing Classic 4-1831-C is backed by FireKing's Limited Lifetime Warranty and After-Fire Replacement Guarantee, subject to FireKing's current written terms, eligibility requirements, exclusions, and claim procedures. After-fire replacement is generally provided to the original purchaser with freight charges collected. Review the current warranty document for complete coverage details.

Frequently Asked Questions

Does the 4-1831-C hold legal-size files?

No. This model is designed for letter-size files. Choose a wider legal-size FireKing Classic model for 8-1/2″ × 14″ documents.

What are the exact exterior dimensions and weight?

The cabinet measures 52-3/4″ high by 17-3/4″ wide by 31-9/16″ deep. FireKing lists an average shipping weight of 603 lbs.

Does this cabinet have a one-hour fire rating?

Yes. It carries a UL Class 350 one-hour fire rating for the protection of paper records and a UL 30-foot impact rating.

Is the cabinet waterproof?

No. It is water-resistant, not waterproof. Its ETL-verified design helps protect records from sprinkler and fire-hose exposure associated with fire response.

Can the standard lock be upgraded?

Yes. A UL-listed Medeco high-security key lock is standard. Combination and electronic lock options are available; confirm compatibility and lead time before ordering.

Helpful Resources

• FireKing Classic 31″ Letter-Size Spec Sheet and Warranty [PDF]
• FireKing Product Color Options [PDF]
• FireKing File Features [PDF]
• Shop All Fireproof File Cabinets

Always follow the current FireKing product instructions, delivery requirements, and written warranty terms. Specifications are subject to change.