
FireKing 4-1831-C Premium Designer Four Drawer Letter 31" D Fire File Cabinet
Price: $3,833.50
- Fire Rating: 60 mins 1700° UL (Underwriters Laboratories)
- External Dimensions: 52.75"H x 17.75"W x 31.5625"D
- Internal Dimensions: 10.38"H x 12.19"W x 26"D
- Cubic Inches: 1.9 cubic feet
- Weight: 573 lbs
VERIFIED PROTECTION RATINGS:


UL 1-Hour Fire-Rated: four-drawer protection for critical letter files
Built for offices that must survive a fire, the FireKing 4-1831-C Premium Designer is a four-drawer, letter-size vertical file cabinet carrying a UL-listed 1-hour Class 350 fire rating tested at exterior temperatures up to 1700 degrees F, plus a UL 30-foot impact rating. It ships standard with a Medeco high-security key lock and is made in the USA.
Each of the four drawers measures 10.38 inches high by 12.19 inches wide by 26 inches deep, giving full letter-file capacity with 31-inch-deep bodies. The cabinet weighs 573 pounds and stands 52.75 inches high by 17.75 inches wide by 31.56 inches deep, a deep-format footprint sized for high-volume records that must stay protected and accessible.
Engineering & Security
- Medeco high-security key lock: The UL-listed Medeco keyway resists picking and restricts key duplication, so only authorized staff can open the cabinet.
- Lock upgrade options: Buyers may upgrade to a UL-listed mechanical, high-security mechanical, or digital electronic lock for an added cost.
- UL 30-foot impact rating: Heated to 1550 degrees F, dropped 30 feet onto rubble, then reheated, the cabinet is verified to survive a multi-story collapse.
- Convenient lock bypass: An integrated bypass lets you secure all drawers or leave selected drawers accessible for daily workflow.
- Made in the USA: FireKing manufactures the 4-1831-C domestically and backs it with a limited lifetime warranty and free after-fire replacement guarantee.
Fire Protection & Interior
- UL 1-hour Class 350 fire rating: Independently UL-listed to keep interior contents below 350 degrees F for one hour at exterior temperatures reaching 1700 degrees F.
- Asbestos-free gypsum insulation: Powerful gypsum-based fill surrounds the body to slow heat transfer to paper documents during a fire.
- Per-drawer insulation: Insulation between every drawer makes each one a separate insulated container, isolating contents from heat.
- ETL 1/2-hour media rating: An ETL 1/2-hour rating for digital media holds the interior cool enough to protect diskettes and other heat-sensitive storage.
- Water-resistant construction: Designed to shield contents from incidental water such as building sprinklers and fire-hose spray during firefighting.
Drawer Layout & File Capacity
- Four letter-size drawers: Each drawer fits standard letter-width folders at 10.38 by 12.19 by 26 inches, totaling four full filing tiers.
- High-side drawer bodies: Drawer sides are built to hold hanging files directly, so no separate frames or hangers are required.
- Replaceable steel panels: Damaged exterior panels can be swapped individually, restoring appearance without replacing the whole cabinet.
- Follower blocks included: Each drawer ships with a follower block plus chrome handles for organized, finished daily use.
Ideal Buyer & Use Cases
The 4-1831-C suits law offices, medical practices, and businesses that store high volumes of irreplaceable letter-size records and need UL-verified 1-hour fire and 30-foot impact protection. At 52.75 inches high by 17.75 inches wide by 31.56 inches deep and 573 pounds, it anchors a records room while keeping four drawers within easy reach.
If you need less capacity, the two-drawer 2-1831-C (sku 2-1831-CMA) or three-drawer 3-1831-C (sku 3-1831-CMA) offer the same fire protection in a smaller footprint. For legal-size documents, step up to the four-drawer 4-2131-C (sku 4-2131-CMA).
Fire Rating
60 mins
Fire Certification
UL (Underwriters Laboratories)
Fire Rating (°F)
1700°
Fill Type
Fire-Resistant Material
Made In
USA
Lock Type(s)
Electronic, Mechanical, Key
Location
File Cabinet
External Depth
31.5625 inches
External Height
52.75 inches
External Width
17.75 inches
Weight
573 lbs
Internal Height
10.38 inches
Internal Width
12.19 inches
Internal Depth
26 inches
Cubic Inches
1.9 cubic feet
Fire Rating
60 mins
Fire Certification
UL (Underwriters Laboratories)
Fire Rating (°F)
1700°
Fill Type
Fire-Resistant Material
Made In
USA
Lock Type(s)
Electronic, Mechanical, Key
Location
File Cabinet
External Depth
31.5625 inches
External Height
52.75 inches
External Width
17.75 inches
Weight
573 lbs
Internal Height
10.38 inches
Internal Width
12.19 inches
Internal Depth
26 inches
Cubic Inches
1.9 cubic feet












