Explosion Mitigation Manhole Solution
Keep your underground power networks covered and secure.
Electrical or gas explosions inside an underground utility vault can happen without warning. In these situations, a standard, unrestrained manhole cover can potentially become a dangerous projectile.
The explosion mitigation manhole assembly (EM3) is designed to relieve built up pressure while restraining the cover during an explosive event and then return to the seated position after the pressure returns to normal.
The cover tilts when there is an underground explosive event. "Directed venting" minimizes path of harmful hot gases.
- Light weight ductile iron cover
- Heavy duty H-25 load application
- Meets AASHTO M306-10 requirements
- Can be used in a retrofit application
- Ergonomic slide rails for easy removal
- Machined seat
- Cast-in bolt holes for securing frame to structure
- Available in sizes ranging from 20" to 40" clear opening – other sizes available upon request
- Made in the USA
- Security bolt for controlled access and theft deterrent
- Custom logo covers
- Special lettered covers
- Frame with angled anchor rods
- Frame with centering ring on bottom
- Vented covers and grated versions available
Operation Demonstration Video
Testing Demonstration Video