MCCCD Official Course Competencies:

MEC228  2006 Spring – 2009 Fall

Construction Sheet Metal and Mechanical Systems II

1.

Examine the principals of airflow that affect component usage, design, and shape and size of ductrum systems. (I)

2.

Using comprehensive blueprints and specifications perform a 'mock' class project including project scheduling, material takeoffs, buyout lists, layout of all walls, floor, and roof openings within scheduled timelines for successful project completion. (II)

3.

Using comprehensive blueprints and specifications coordinate with other trades on the 'mock' project to identify and prevent potential project conflicts for successful project completion. (III)

4.

Discuss uses of triangulation including roof collars, offsets, and elbows. (IV)

5.

Discuss layout including review, choosing the layout methods, shop methods, layout problems. (V)

6.

Identify typical roofing materials including roll roofing, composite shingles, wood shingle and shake, tile, metal, drip edge, flashing, underlayment, and membranes. (VI)

7.

Discuss types roof slope including steeply sloped, low-slope as they relate to drainage. (VII)

8.

Examine roof flashing including installation of flashing on metal roofs, and differential movement according to industry recommendations. (VIII)

9.

Discuss guidelines for installation of gutters, downspouts, and chimneys to meet industry standards. (IX)

10.

Demonstrate safe and proper installation of a conductor elbow, a rectangular outlet tube, two rectangular gutters, a conical gutter outlet, shingle roof flashing, chimney flashing, and top surface wall flashing. (X)

MCCCD Official Course Outline:

MEC228  2006 Spring – 2009 Fall

Construction Sheet Metal and Mechanical Systems II

I. Principals of Airflow

A. Components

B. Design

C. Shape and Size

II. Mock Project

A. Blueprints and Specifications

B. Materials takeoffs

C. Buyout lists

D. Layout

1. walls

2. floor

3. roof

E. Timelines

III. Project Coordination

A. Other trades

B. Conflicts

1. identify

2. prevent

C. Completion

IV. Triangulation

A. Roof Collars

B. Offsets

C. Elbows

V. Layout

A. Review

B. Choosing Layout Methods

C. Shop Methods

D. Layout Problems

1. square -to-round two-way offset

2. rectangular-to-round ventilator base

3. two-way-offset transition

4. Y-branch rectangular transition

5. 90 degree transition change elbow

6. 90 degree transition change elbow, alternate method

7. 90 degree Y-branch with different size branch ducts

8. tapered duct section with one straight side

9. square-to-round at an angle or pitch fitting

10. rectangle-to-round elbow

11. Y-branch round-to-round

12. transition duct

VI. Roofing Materials

A. Roll Roofing

B. Composite Shingles

C. Wood Shingle and Shake

D. Tile

E. Metal

F. Drip Edge

G. Flashing

H. Underlayment

I. Membranes

1. built-up

2. pre-manufactured

3. waterproof

VII. Roof Slope

A. Steeply Sloped

B. Low-Sloped

VIII. Roof Flashing

A. Metal Roofs

B. Differential Movement

C. Industry Recommendations

IX. Gutters, Downspouts, and Chimneys

A. Installation

B. Industry Standards

X. Safe and Proper Installation

A. Conductor Elbow

B. Rectangular Outlet Tube

C. Two Rectangular Gutters

D. Conical Gutter Outlet

E. Shingle Roof Flashing

F. Chimney Flashing

G. Top Surface Wall Flashing