Product Code: JCS-DONN36

Manufacturer’s Code: DX324TH370W

These DONN 3.7m white main tees, also known as main runners, form the primary framework of a compatible 24mm exposed suspended ceiling grid. From the Knauf Ceiling Solutions portfolio, they are supplied in a box of 20 lengths, providing 74 linear metres in total.

Main runners are supported by the specified suspension and receive the cross tees that form the ceiling modules. Combine them with the appropriate DONN cross tees and perimeter trim for your chosen tile layout.

Important: Use components specified for the same DONN ceiling grid system. For replacement work, check the manufacturer’s code, runner profile, connection details and cross-tee slot positions. The same brand name or 24mm face width alone does not establish compatibility.

Product Features

• Length: 3700mm / 3.7m per runner.
• Exposed face width: 24mm.
• Finish: white face.
• Pack quantity: 20 lengths per box.
• Total length: 74 linear metres per box.
• Primary runners for use with compatible DONN cross tees and the specified suspension components.

Choose suitable board edge ceiling tiles or T24 tegular / reveal edge tiles specified for your selected grid. Check tile dimensions, edge detail and weight against the complete ceiling specification.

Fire performance: a main runner alone does not provide a 60-minute fire resistance rating. Where a fire-rated ceiling is required, the exact tiles, grid, suspension, perimeter details and installation must match the documented tested construction.

Matching DONN Components

Complete your component selection from the DONN range, checking the required system references:

DONN 1200mm Cross Tees – connect between compatible main runners to form the ceiling layout.
DONN 600mm Cross Tees – subdivide a compatible layout into 600 x 600mm modules.
DONN 3m Wall Angle – perimeter trim for the specified ceiling detail.
Browse the DONN Ceiling Grid Range – view the category guide and available components.

Planning Your Ceiling Grid

Use our Ceiling Grid Calculator for an initial quantity estimate. Check the result against your room layout, these 3.7m runner lengths, cutting allowance and full-box requirements. The 74 linear metres supplied per box is not a ceiling area coverage figure.

Runner spacing, hanger positions and permitted loading depend on the exact ceiling system. Follow its installation documentation rather than assuming a standard spacing applies to every project. Our suspended ceiling installation guide provides an introduction to the installation process.

Matching an existing runner? Send us photographs of its profile, end connections and printed markings, quoting JCS-DONN36 / DX324TH370W. Contact our team for help identifying the component and obtaining the relevant technical information.

Need an Urgent Delivery?

Working to a deadline? Call 01253 864902 with your postcode, quantities and required date. We can check stock and available delivery options before you order. Urgent delivery depends on availability, destination and transport arrangements.

Trade Customers and Project Pricing

Ordering in bulk or purchasing regularly? Apply for a JCS Trade Account to access trade pricing, or send us your full component list for a project quotation.

Found a lower price? Send us the competing quotation for the same product, pack quantity and delivery requirements. We will check whether we can match or improve it.