MCCCD Program Description

Framing: Framing Square

Course: CRP103AJ

First Term: 1995 Spring

Lec + Lab 1 Credit(s) 1.5 Period(s) 1.5 Load
Subject Type: Occupational
Load Formula: A

Description: Tables, charts, and scales on the framing square; methods of determining brace lengths and angle cuts; step-off method of figuring rafter length; framing components that make up a variety of different roofs; decimal conversion; backing and lowering hip rafter; laying out a rafter given a slope and a span; conversion between pitch and slope; using a speed square

MCCCD Official Course Competencies
1. Read and apply all tables, charts, and scales on the framing square. (I) 2. Identify specific roof types and their component parts. (II,III) 3. Layout a common rafter. (IV) 4. Given the slope of a roof, convert to pitch; given the pitch of a roof, convert to slope. (IV) 5. Convert measurements between decimal representation and feet and inches representation. IV) 6. Step-off a rafter length given a slope and a span. (V) 7. Layout a hip, valley, hip jack or valley jack rafter, (V) 8. Determine ridge lengths using the framing square. (VI) 9. Read and apply the scales on a speed square. (VI)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Parts of Framing Square A. Face B. Back C. Heel D. Tongue E. Blade F. Scales 1. Sixteenths 2. Twelfths 3. Tenths 4. Hundredths G. Brace Table 1. Pythagorean Theorem 2. Hypotenuse 3. Multiples 4. Angles H. Octagon Scale 1. Board Measure 2. Use of Table 3. Use of Formula J. Rafter Table 1. Metric Conversion 2. slope 3. Pitch 4. Use of Table II. Roof Types A. Flat B. Shed C. Gable D. Hip E. Dormer F. Mansard G. Gambrel III. Roofing Components A. Ridge B. Common Rafter C. Hip Rafter D. Valley Rafter E. Hip Jack G. Purlin H. Collar Beam I. Plate J. Gable Stud K. Overhang IV. Common Rafter Layout A. Ridge B. Rise C. Run D. Span E. Slope F. Conversion 1. Slope to Pitch 2. Pitch to Slope G. Birdsmouth 1. Plumb Cut 2. Seat Cut H. Line Length I. Overhang J. Projection K. Shorten for Ridge L. Tail M. Measurement Conversion 1. Decimal to Feet and Inches 2. Feet and Inches to Decimals V. Hip Roof Layout A. Significance of the 17` Run B. Shortening the Hip C. Figuring Length 1. Rafter Table 2. Step-off Method D. Cutting Birdsmouth E. Backing of Lowering Hip Rafter F. Making Tail Cut G. Jacks 1. Difference in Lengths 2. Shortening H. Side Cuts 1. Hip from Table 2. Valley 3. Jacks from Table 4. Laying Out I. Determining Ridge Length J. Adding to the Ridge VI. Speed Square- scales A. Relation to Framing Square-Ridge Lengths B. Common Rafter Scale C. Hip or Valley Rafter Scale D. Long Cut of Slope E. Degree Scale

MCCCD Governing Board Approval Date: 10/25/1994

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.