DynaLoc™ Type 3 Day box for Explosives

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DynaLoc™ Type 3 Daybox for Explosives

DynaLoc™ Type 3 Day box for Explosives

Type 3 Explosive Storage Magazine

U.S. Chemical Storage manufactures a durable Type 3 explosive magazine, also known as a “daybox,” for temporary, supervised storage. Our daybox for explosives helps your team safely transport small amounts of explosives from your standard storage area for use on your worksite or training facility and back again. Lightweight and portable, each Type 3 daybox is constructed of 12-gauge steel lined with 1/2 inch of plywood and is available in five standard models. Custom sizes are easily possible if needed. DynaLoc Daybox with lid open showing wood interior construction for non-sparking protction

Need a lighter-weight option?

Aluminum dayboxes are also available for ease of lifting the box out of vehicles or for repetitive movement. DynaLoc aluminum daybox for storing hazardous materials

Type 3 IME/DOT Dayboxes:

When transporting explosives and detonators at the same time, dayboxes must adhere to the IME SLP 22 requirement on public highways. Our boxes feature 12-gauge steel construction with a laminate interior of 3/4-inch drywall and 1/2-inch plywood. Four standard sizes are available, including a two-part compartment design that allows storage of transport of detonators and explosives within the same box. Dynaloc IME daybox, white with lid open showing the inside construction

Type 3 Day Box Features & Benefits:

  • Non-sparking interior
  • Fire-resistant construction
  • Weather-resistant construction
  • Top-opening lid door overlaps the sides by one inch
  • Single-lock door system features hinges and hasps welded to the lid– cannot be removed when the lid is closed and locked

Explosive Storage Magazine Compliance:

All magazines meet and exceed:
  • ATF 27 CFR, Part 555.208

Common Applications:

  • Military/law enforcement explosive and ammunition transport
  • K-9 training unit material transport
  • Municipal explosive and ammunition transport
  • Contractor explosive transport

Exterior Dimensions: L x W x H

Diagram of a bright red explosive storage magazine with height, width, and length directions

Type 3 Day Box Magazine Sizes

Type 3 Day Box Storage

Dimensions Exterior: 14 x 12 x 8 in (LxWxH)
Dimensions Interior: 12.8 x 10.8 x 6.75 in
Approximate Weight: 34 lbs.

Type 3 Day Box Storage

Dimensions Exterior: 24 x 18 x 12 in (LxWxH)
Dimensions Interior: 22.8 x 16.8 x 10.8 in
Approximate Weight: 84.19 lbs.


Type 3 Day Box Storage

Dimensions Exterior: 48 x 18 x 18 in (LxWxH)
Dimensions Interior: 46.8 x 16.8 x 16.8 in
Approximate Weight: 183 lbs.

Type 3 Day Box Storage

Dimensions Exterior: 60 x 24 x 24 in (LxWxH)
Dimensions Interior: 58.8 x 22.8 x 22.8 in
Approximate Weight: 308 lbs.


Type 3 IME/DOT Day Box Magazine Sizes

Type 3 IME/DOT Day Box

Dimensions Exterior: 14 x 12 x 8 in (LxWxH)
Dimensions Interior: 11 x 9 x 5 in
Approximate Weight: 58 lbs.

Type 3 IME/DOT Day Box

Dimensions Exterior: 17 x 24 x 18 in (LxWxH)
Dimensions Interior: 14 x 21 x 15 in
Approximate Weight: 175 lbs.


Type 3 IME/DOT Day Box

Dimensions Exterior: 42 x 24 x 24 (LxWxH)
Approximate Weight 507 lbs.

Type 3 IME/DOT Day Box

Dimensions Exterior: 60 x 24 x 24 (LxWxH)
Approximate Weight 680 lbs.

Other Types of Explosive Storage Magazines

DynaLoc™ Type 2 Indoor Magazine

DynaLoc™ Type 2 Indoor Magazine

For storing high explosives (up to 50 lbs.) inside your facility. Front-open (cabinet) and top-open styles available. The portable steel construction-lined hardwood storage magazines keeps your explosive components or ammunition secure and safe.

type 2 outdoor magazine storage unit from U.S. Chemical Storage

DynaLoc™ Type 2 Outdoor Magazine

For portable outdoor storage of your high explosives. Many models include forklift pockets for easy relocating. U.S. Chemical Storage engineers durable Type 2 portable outdoor storage for your high explosives. Each explosive storage magazine features ¼-inch steel plate construction lined with 3 inches of non-sparking hardwood and a double locking door system.

A red DynaLoc Explosive Magazine from US Chemical Storage with cam-lock latch closure and double-lock hood for security

DynaLoc™ Type 4 Explosive Magazine for Low Explosives

For indoor or outdoor, long-term storage of low explosives. All include forklift pockets and crane lifting rings to easily move or relocate.



1. What are day boxes?

Day boxes are used for the transfer and temporary, supervised storage of your explosives. These magazines are light enough for daily transport from your overnight storage area to the job site. Our DynaLoc™ day boxes are constructed to be fire-resistant, weather-resistant, and theft-resistant.

2. Does my explosive storage need to be grounded?

Yes. High and low explosives that are placed in outdoor magazines should have a grounding system according to the NFPA 70 standard. Grounding protects your magazine and its contents against lightning strike, and it will need to be properly grounded by a licensed electrician. For more information, please refer to NFPA .

3. What are the classes of explosives?

For storage purposes, federal requirements classify explosive materials according to their velocity. There are three classes of explosive materials, per ATF 27 CFR 555.202:

  • High Explosives – explosives which detonate by means of a blasting cap (dynamite, emulsions, flash powders, etc.)
  • Low explosives – explosives which deflagrate when confined (black powder, safety fuses, ignitor cords, “display fireworks,” etc.)
  • Blasting agents – explosives consisting of fuel and oxidizer, intended for blasting and unable to detonated by a No. 8 test blasting cap when unconfined (ammonium nitrate-fuel oil and certain water-gels)

For more information, visit https://www.atf.gov/explosives/explosive-storage-requirements.

4. Can DynaLoc magazines be customized?

Yes. Like all our safe storage buildings, U.S. Chemical Storage can provide custom explosive storage magazines to fit your needs. For assistance creating a custom solution for your storage needs, contact one of our experts.

5. If storage magazines are mostly made of high-density wood, will that really contain a blast?

No. A common misconception is explosive storage magazines will contain a blast inside the unit—this is not the case. Explosive storage magazines work as a safeguard against theft and accidental detonation by improper storage and the environment.

6. What is the difference between a Type 2, Type 3, and Type 4 explosive storage magazine?

Each class requires a unique storage solution to ensure optimal safety and management. Type 2 is for storage of high explosives, Type 4 is for storage of low explosives, and Type 3 are day boxes that are used to transport both high and low explosives. Our Type 2 and Type 4 explosive storage magazines are available in both indoor and outdoor styles, and every storage type we offer features theft-resistant, weather-resistant, and fire-resistant construction.

7. Which day box is right for me?

We offer both steel and aluminum day boxes to transport explosives. If you need to repeatedly unload and load your day box and weight is a concern, an aluminum model helps reduce weight while still meeting ATF requirements. Additionally, our IME DOT dayboxes meet stringent SLP 22 requirements for “Recommendation for the Safe Transportation of Detonators in a Vehicle with Certain Other Explosive Materials.”