3M 7000133839 Cast-in Height Adaptor 4 Inch Extension

Product Description

The 3M 7000133839 is a cast-in height adaptor designed for use with the 3M Fire Barrier Cast-In Device in concrete floor-penetration firestop assemblies. It extends the allowable concrete pour depth by 4 inches, accommodating installations requiring up to 12 inches of pour depth. The adaptor works with both metallic and non-metallic versions of the Fire Barrier Cast-In Device, giving installers flexibility across different pipe penetration conditions. Firestop contractors and licensed specialty subcontractors install this component during the concrete pour phase of construction. It is sold individually by unit.

This height adaptor is used in commercial and multi-family residential construction where concrete floor slabs exceed the standard depth range of the base Cast-In Device. It is installed before the concrete pour to ensure the firestop sleeve assembly sits flush and functions correctly within thicker slab profiles. Typical applications include poured concrete decks in high-rise, institutional, and mixed-use construction projects where building codes require listed firestop assemblies at pipe penetrations.

Key Features

• Extends concrete pour depth capacity by 4 inches, up to 12 inches total
• Compatible with both metallic and non-metallic 3M Fire Barrier Cast-In Device models
• Designed for use in poured concrete floor firestop penetration assemblies
• Sold as individual unit with a minimum order quantity of 12
• Lightweight at 0.68 pounds for easy handling on the job site

Compatibility

Designed for use in conjunction with the 6-inch 3M Fire Barrier Cast-In Device, accommodating both metallic and non-metallic models of that device.

Installation Notes

Installation is performed by firestop contractors or qualified specialty installers during the concrete forming and pour phase. Power down or isolate any adjacent systems before working in the slab area. Follow the requirements of the applicable building code and the listed firestop assembly instructions for correct positioning and attachment before the concrete pour. Do not install after concrete has been placed, as the adaptor must be set in advance to ensure proper embedment depth.

Technical Specifications

• Height Extension: 4 inches
• Maximum Pour Depth Supported: 12 inches
• Weight: 0.68 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 12
• UPC: 00051115165511

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000133839