MegaShield Modular Block
MegaShield™ was created by NELCO as a competitively priced, modular alternative to a poured cast-in-place (CIP) vault. Each MegaShield™ system is made up of interlocking concrete blocks, available in both standard and high density weights. These blocks are cast at a local, off-site, pre-approved and qualified facility, allowing NELCO to manufacture them during the permitting process. Blocks arrive on site cured and ready to assemble, reducing construction time significantly. MegaShield™ vaults can be assembled in as little as four weeks.
The system can be erected outside a building, or inside of most existing facilities, and can be used for a variety of modalities. MegaShield™ can also be removed and relocated, making it the ideal solution for leased spaces. When space constraints are an issue, a hybrid model of MegaShield™ and other shielding, such as Interlocking Lead Brick or High Density Concrete Blocks, can be designed. Other options include site work, foundation work, interior finish, and mechanical and electrical systems.
Uses
- Linear accelerator vaults
- Proton therapy rooms
- Shielding CT Image-Guided IMRT
- Industrial uses (such as non-destructive testing and homeland security applications)
Dimensions
- Standard block sizes: 2’ x 2’ x 2’; 2’ x 2’ x 4’; 2’ x 2’ x 6’
- Densities: standard weight concrete (147 pounds per cubic foot, 2.35 tons per cubic meter); high density concrete (240 pounds per cubic foot or 3.84 tons per cubic meter)
- Custom sizes to meet any requirements
- Minimum compression strength of 4,000 pounds per square inch
FAQs
Q: What type of foundation is required for a MegaShield™ vault?
A: MegaShield™ requires a foundation just like any other vault. In fact, it is no different than a CIP/PIP vault foundation.
Q: What energy of accelerator will work within the system?
A: Our standard MegaShield™ vault is designed for a dual energy Linear Accelerator 6 and 18Mev with IMRT Capability. The vault is also designed for 100% occupancy on the four walls and ceiling. It can be customized to meet specific requirements while maintaining modularity.
Q: What is the system made of?
A: The standard MegaShield™ Blocks are 147 or 240 pound per cubic foot concrete with some additives that will reduce block spawling.
Q: How much does a block weigh?
A: The average 2’‐0”x2’‐0”x6’‐0” 147 pound per cubic foot block weighs 3,528 pounds. The 240 pound per cubic foot block weighs 5,760 pounds
Q: When are the blocks delivered on site?
A: Block delivery begins three weeks prior to installation. This is because each truckload can only carry 12 blocks at a time due to weight restrictions.
Q: What is the standard time frame for erecting a MegaShield™ vault?
A: Typically 3 to 5 weeks from when installation starts to when the door is installed.
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