Johnson Level & Tool RAS-120 Aluminum Rafter Square Instruction Manual

1. Introduction

The Johnson Level & Tool RAS-120 Aluminum Rafter Square is a versatile and durable tool designed for precision in various construction and woodworking tasks. This 12-inch rafter square serves as a saw guide, stair layout tool, and rafter tool, providing accurate measurements and markings for professionals and DIY enthusiasts alike. Its robust construction and clear graduations ensure reliable performance for accurate cuts and layouts.

Image 1.1: The Johnson Level & Tool RAS-120 Aluminum Rafter Square, a versatile measuring and layout tool.

2. Key Features

• Durable Aluminum Body: Constructed from solid aluminum with CNC machined edges for enhanced accuracy and longevity.
• Low-Glare Finish: Features a protective powder-coated finish that reduces glare, making permanent graduations and numbers easy to read in various lighting conditions.
• Accurate Graduations: Permanently etched markings ensure long-lasting readability and precise measurements.
• Scribe Notches: Includes scribe notches starting at 1-3/4 inches, useful for transferring outside increments from the pivot point.
• 2x4 Board Markers: Handy markers are included to measure common 2x4 board dimensions of 1-1/2 inches, 3 inches, and 3-1/2 inches.
• Integrated Protractor Scale: Allows for precise angle measurements and cuts.

Image 2.1: Detailed diagram highlighting the key features of the RAS-120 Rafter Square, including scribe notches, permanent graduations, and durable coating.

Aluminum Body

Low-Glare Finish

Permanent Graduations

3. Operating Instructions

3.1 Using as a Saw Guide

The thick edge of the RAS-120 Rafter Square is designed to serve as a reliable saw guide for both cross-cuts and angled cuts. Align the square's thick edge along your desired cut line, ensuring it is firmly pressed against the material. Use the engraved protractor scale to set the desired angle for angled cuts. For rip cuts, the scribe notches can be used to mark a straight line parallel to the edge of the material.

Image 3.1: The RAS-120 Rafter Square being used as a saw guide for making precise cuts with a circular saw.

3.2 Stair Layout

This 12-inch triangle square features an integrated distance and angle scale that simplifies stair layout. It allows for quick and precise drawing of cut lines on stringers. The square includes scales for cutting hip, valley, and jack rafters, making complex roof and stair framing more manageable.

3.3 Scribe Notches

The scribe notches, located along the edge of the square and starting at 1-3/4 inches, are ideal for marking parallel lines. By placing a pencil in the desired notch and sliding the square along the edge of your material, you can accurately transfer increments from the pivot point, creating consistent and straight lines for various applications.

4. Maintenance

To ensure the longevity and accuracy of your Johnson Level & Tool RAS-120 Rafter Square, follow these simple maintenance guidelines:

• Cleaning: Wipe the square clean with a soft, dry cloth after each use to remove dust, sawdust, and debris. For stubborn grime, use a mild soap solution and dry thoroughly.
• Storage: Store the square in a dry environment to prevent corrosion. Avoid storing it in areas with extreme temperature fluctuations or high humidity.
• Inspection: Periodically inspect the square for any signs of damage, such as bending or nicks on the edges, which could affect its accuracy.
• Avoid Harsh Chemicals: Do not use abrasive cleaners or solvents, as these can damage the protective powder-coated finish and etched graduations.

5. Specifications

6. Warranty Information

The Johnson Level & Tool RAS-120 Aluminum Rafter Square is backed by a Limited Lifetime Warranty. This warranty covers defects in materials and workmanship under normal use. For specific details regarding warranty claims, coverage, and limitations, please refer to the official Johnson Level & Tool website or contact their customer support directly.

7. Support

For further assistance, technical questions, or to report any issues with your Johnson Level & Tool RAS-120 Aluminum Rafter Square, please contact Johnson Level & Tool customer support. You can typically find contact information on the product packaging or the official brand website.

8. Manufacturer's Heritage

Learn more about the history and commitment to quality from the manufacturer of this tool.