The Dometic Awning Rafter Assembly (Part# 3309974.005B) is a genuine OEM replacement support arm designed to stabilize and reinforce your RV awning in extended position. This 74-inch polar white rafter assembly provides critical structural support between your awning roller and the ground, preventing fabric sag and reducing stress on the awning arms during windy conditions. Essential for RV owners who need to replace damaged or worn rafter arms on compatible Dometic and A&E brand awnings.

Key Features

• Genuine Dometic OEM Part: Factory-engineered replacement ensures perfect fit and reliable performance
• 74-Inch Extended Length: Provides optimal support for standard RV awning installations
• Polar White Finish: Matches most RV awning hardware and maintains clean appearance
• Adjustable Support: Telescoping design allows height adjustment for proper awning pitch and drainage
• Durable Construction: Built to withstand outdoor elements and repeated setup/takedown cycles
• Complete Assembly: Includes all necessary components for direct replacement installation

Technical Specifications

Part Number	3309974.005B
Length	74 inches
Color	Polar White
Type	Rafter Assembly (Support Arm)
Brand Compatibility	Dometic / A&E Awnings
Installation	Direct OEM Replacement

Frequently Asked Questions

How do I know if this rafter assembly will fit my awning?

This 74-inch rafter is designed for standard Dometic and A&E brand RV awnings. Measure your existing rafter arm from end to end when fully collapsed. If your current rafter measures approximately 74 inches and is polar white, this is likely the correct replacement. Check your awning's model documentation or contact our parts specialists with your awning model number for confirmation.

What's the difference between a rafter arm and the main awning arms?

Rafter arms (also called support arms) are the additional stabilizing poles that run from the awning roller tube down to the ground at an angle. They're separate from the main extending arms that attach to your RV. Rafters provide extra support to prevent fabric sag and reduce stress on the primary awning mechanism, especially important in windy conditions.

Can I use just one rafter, or do I need to replace both?

While you can replace a single damaged rafter, most RV awnings use two rafter assemblies (one on each side) for balanced support. If one rafter is worn or damaged, the other is likely experiencing similar wear. For optimal awning stability and appearance, consider replacing both rafters at the same time.

Is this rafter assembly difficult to install?

Installation is straightforward for most RV owners with basic tools. The rafter typically attaches to the awning roller tube with a bracket and extends down to rest on the ground or attach to a mounting point. Always refer to your awning's installation manual and ensure the awning is properly secured before making any adjustments. If you're uncomfortable working with your awning hardware, consult a qualified RV technician.

Why Choose Elkhart RV Parts?

At ElkhartRVParts.com, we specialize in hard-to-find Dometic replacement parts that keep your RV systems running smoothly. Located in Elkhart, Indiana — the RV Capital of the World — we understand the importance of getting the right part quickly. We stock genuine OEM Dometic components and provide expert support to help you identify exactly what you need. Fast shipping, authentic parts, and knowledgeable service make us your trusted source for Dometic awning components and accessories.