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Lesson Plan Originally Created By: Marty Mangan

Installing Hip and Valley Rafters - Lesson # 8

Part of Unit: Wall framing

Lesson Plan Overview / Details

Lesson Overview #8  Installing Hip and Valley Rafters. This is lesson #8 of a 9 part unit on framing a 3 room model wooden residential house.

Lesson Time: Installing a hip and a valley rafters

Lay-out, cutting & installing hip and valley rafters
2 Weeks

Standards: Lay-out, cutting & installing a hip and a valley rafter

Objectives and Goals

  • Students will be able to lay-out, cut and install hip and hip-jack rafters for the model residential house.
  • Students will be able to lay-out, cut and install valley and valley-jack rafters.
  • Students will be able to use a rafter speed square to accomplish both of the above objectives.

Activities in this Lesson

  • Activity #1:  While the instructor takes roll, have the students watch:

    Youtube - Hurricane Ike Rips Roof off Right Behind Reporter 

    Discuss with the students the importance of proper roof installation.

     

    Youtube - Geraldo Rivera Falls From Hurricane IKE... Watch this just for fun.

     

      

       

     

  • Activity #2: The students will watch:  Frame a Hip Roof, Fast & Easy

    Note:  The Larry Haun, “Roof Framing” video is a 3 part DVD series. It has a very good presentation on laying-out roof rafters.

        

    1.      The instructor will show the students how to lay-out and cut a hip rafter for the model house roof.

    2.      Using a piece of 5/16’’x ½’’material stock, about 12’’long, cut a compound angle at one end.

     

    Note: The rise and run of the roof pitch for the model house is 7 in 12. That means the roof  has a 7" of rise (vertical) for each foot of run (horizontal).

     

    3.      Use a speed square's, hip rafter scale, to mark the compound angle of the hip cut.

    1 ST-  Hold the speed square, at the pivot, against the top edge of the material stock.

    2 ND -  Pivot the speed square up, at the pivot, until you reach 7 of the HIP/ VAL scale.

    3 RD–  At that point draw a line across the face of the board, at the top of the square.

    4 TH–  On the top edge of the board, at the line just drawn on the face, draw a 45 degree line up across the edge of the board to form a point.

    5 TH–  Clamp the board in a vice and cut the compound angle.

     

     

    Resources and Materials

  •     Activity #2: The instructor will show the students how to install the hip rafter 

    1.     The hip rafter is nailed to the side of the rectangle truss at the roof ridge

    2.      Nail the other end of the rafter, at the connection of wall #4 & 5, with a 1’’brad, to the top plates.

                               

    Note: See a photo of the hip rafter location in the resources/materials.

     

    2.      Let the hip rafter run long until you install the fascia, then cut it.

    3.      The hip-jack  rafters have the same compound angle as the hip rafter.

    4.      Nail the hip-jack rafters, to the hip rafter, measured 2’’ OC from the half  trusses.

    Note: Use a brad pusher to drive ½’’ brads through  the compound angle of all the hip rafters. Also use a little glue. Nail the other end of the hip rafters, with a 1’’brad, into the top plates.

    Note: Hip-jack  rafters have the same end cut as the hip rafter, so let them also run long, until you install the fascia, then cut them.

     

                             

  • Activity #3:

    1.     The instructor will show the students how to  lay-out, cut and install the valley rafters for the model framed house.

    1 ST-  Hold the speed square, at the pivot, against the top edge of the material stock.

    2 ND -  Pivot the speed square up, at the pivot, until you reach 7 on the HIP/ VAL scale.

    3 RD–  At that point draw a line across the face of the board, at the top of the square.

    4 TH–  On the top edge of the board, at the line drawn on the face, draw a 45 degree line down across the edge of the board to form a point at the bottom of the valley rafter.

    5 TH–  Clamp the board in vice and cut the compound angle.

     

    1.      The valley rafter is nailed to the opposite side of the inside corner of the rectangle trusses,  at the roof ridge.

    2.      Then nail the other end of the rafter, at the connection of wall #2 & 6, with a 1’’ brad into the top plates.

                               

    Note: See a photo of the valley rafter location in the resources/materials.

     

    3.      Let the valley rafter run long until you install the fascia, then cut it.

    4.      The valley-jack  rafters have the same compound angle as the valley rafter, but have a 26 degree angle at the ridge.

    5.       Nail the valley-jack rafters to the rectangle trusses, measured 2’’ OC from the last half truss.

    5.      Nail the other end of the valley-jack rafters, to the valley rafter, parallel to the half trusses.

    Note: Use a brad pusher to drive ½’’ brads through  the compound angle of all the valley rafters. At the other end of the valley rafter use a little glue and  1/2’’brads to install the valley-jacks to the rectangle trusses.

                            

     

                                                                       

     

     

     

    Resources and Materials

Assessment: Framing a hip and valley rafter

Assessment Types:
Projects, Observations,

Assessment: The instructor will check the student's installation  for:

1.     Accuracy of the student's measurements in the lay-out and framing a hip and valley rafter.

2.     The student's craftsmanship in installing a framing  hip and a framing valley rafters for the model framed roof.