Training

MDU Installation Techniques

Learn more about how conduit is used in MDUs. This type of construction has its own special needs and Dura-Line has specialty products to fit every scenario.

INTERIOR MICRODUCT INSTALLATION

Interior MicroDucts are designed to be used in MDU (Multi-Dwelling Units) and MBU (Multi-Business Units) applications. Interior MicroDucts can be used in Greenfield (New Construction) and Overlay (Brownfield) markets. There are two types of MicroDucts designed exclusively for interior use – Riser-rated and Plenum-rated.

MicroDuct Characteristics:

SILICORE® super slick permanent lining
Internal longitudinal ribbing
Standard with a Pull String
Also available with pre-installed single fiber cordage
Plenum Color (Opaque White)
Riser Color (Dull Yellow)

Plenum

Plenum is the air handling space, such as that above drop ceiling tiles, in raised floors and possibly between the roof and ceiling. Smoke from fire in this area quickly spreads to other parts of the building by circulation. Consequently, the material used in this area is required to pass very stringent testing.

Riser

Riser pathways are for cables that pass between floors. It is normally a vertical shaft or space. Materials used in this area are required to pass a less stringent test than plenum.

MicroDuct Placement Guidelines

When placing Dura-Line MicroDucts, the length can vary based on the configuration of the MicroDuct run.

The run should not exceed 200’
No more than eight 90º bends in 200’
No more than sixteen 45º bends in 200’
Each bend should have at least a 14” radius
Long sweeping bends are recommended

Make Sure:

Use smooth bends with the MicroDuct routing
No kinks or deformities in the pathway
Proper strapping and support of the MicroDucts
Properly label MicroDucts and pull lines on both ends

Pathway Routing Considerations

Place runs to minimize the amount of MicroDuct required
Choose the path that will require the minimum number of bends
Avoid mechanical damage, hot water pipes, steam pipes, metal gratings, etc.
Make sure the MicroDucts will not interfere with drywall installation
Drill your right of ways in a manner that will not interfere with the bend radius or add bends