3M 7100138820 Fire Barrier Cast-in Device 3 Inch Firestop

Product Description

The 3M 7100138820 is an intumescent fire barrier cast-in device designed to firestop 3-inch non-metallic pipe and conduit penetrations through fire-rated concrete floor assemblies. The device attaches directly to the concrete form prior to slab pour, creating a formed opening that remains accessible once the slab cures and forms are stripped. When exposed to fire, the intumescent material expands to seal the annular space around the penetrant, providing up to 3 hours of fire protection. It is installed by mechanical, electrical, and plumbing contractors working on new concrete slab construction.

This cast-in device is suited for use in commercial and residential construction where fire-rated concrete floor assemblies require through-penetration firestop protection for plastic pipe or non-metallic conduit. It is placed during the forming stage, before the concrete pour, which eliminates the need for a separate coring or patching step after construction. Mechanical, electrical, and plumbing penetrants are routed through the formed opening after the slab has cured and forms are removed.

Key Features

• Intumescent material expands under heat to seal around plastic pipe penetrations and limit fire spread
• Rated for up to 3 hours of fire protection in concrete floor assemblies
• Fits 3-inch non-metallic pipe and conduit penetrations
• Cast-in design attaches to form before concrete pour, eliminating post-pour coring
• Supports routing of mechanical, electrical, or plumbing penetrants after slab cure

Compatibility

Designed for use with 3-inch non-metallic pipe and conduit penetrations through fire-rated concrete floor assemblies in new construction applications.

Installation Notes

Installation is performed by licensed mechanical, electrical, or plumbing contractors in coordination with concrete formwork crews. The device must be secured to the form before the concrete slab is poured; do not attempt to install after the slab has cured. Verify compliance with applicable fire and building codes, including IBC through-penetration firestop requirements, before installation. Always confirm the annular space and penetrant type match the device rating prior to use.

Technical Specifications

• Pipe Size: 3 inches
• Penetration Type: Non-metallic pipe and conduit
• Fire Rating: Up to 3 hours
• Assembly Type: Fire-rated concrete floor
• Weight: 1.42 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 12

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100138820