8 in. Aluminum Cradle Beam

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SKU: 70375
UPC: 013964521450



8 in. Aluminum Cradle Beam

The 8 in. Aluminum Cradle Beam is an extruded aluminum I-beam with sheave housing mounted on the ends of the flange. Sheave housings accommodate 4 in. aluminum sheaves with a bronze bushing. Using an axle bolt with washers and a nut holds sheave in place.

Made from marine-grade, extruded 6o61-T6 US aluminum. No weld construction. The sheave housings include the cradle beam mounting fasteners. Measures 12 ft. 6 in. L x 8 in. web x 5 in. flange. .250 in. web thickness. .410 in. flange thickness. 6.307 lbs. per linear ft.

Ships loose freight only.

4 in. sheave and axle bolt is not included.

6061-T6 Marine-Grade US Aluminum

6061-T6 is an all-around popular grade of aluminum. Commonly used in marine applications. Very good corrosion resistance. Precipitation hardened. These grades, for the most part, have additional chromium and manganese to help protect them from corrosive marine conditions. The aluminum channel falls into this category.


Material: Aluminum
Type: 6061-T6 US
Style: Marine-grade extruded
Beam Type: Structural
Web Size (A): 8 in.
Flange Size (B): 5 in.
Web Thickness (C): .250 in.
Flange Thickness: .410 in.
Beam Wt./Lin Ft.: 6.307 lbs. (per ft.)
Shipment Type: Loose freight / Local pickup
Sheave Housing Dimensions: 8 in. web x 5 in. flange
Accepts: 4 in. aluminum sheave
Material: Aluminum
Sheave Bolt Bore: 3/4 in.
Fasteners Material: 316 stainless steel
Bolt Type: Hex head
Bolt Amount: 4
Bolt Size: 1/2 in. x 2 1/2 in.
Washer Type: Lock
Washer Amount: 4
Washer Size: 1/2 in.
Nut Amount: 4
Nut Size: 1/2 in.

All boat cradles, cradle beams, and boat lift ship freight. It is the responsibility of the purchaser to unload the freight from the delivery truck. The purchaser must be present during delivery. For more questions, visit our shipping terms and conditions.

Drilling into the aluminum structural beam compromises the integrity of the aluminum structural beam.

Product Overview

  • Made from marine-grade, extruded 6061-T6 US aluminum
  • Measures 12 ft. 6 in. L x 8 in. web x 5 in. flange
  • Includes aluminum structural beam with sheave housing installed on the flange
  • Ships loose freight only


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