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A solid pine door and doorframe are shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2010
Question 4
A solid pine door and doorframe are shown in the accompanying sketch. The door and frame are fitted in a 100 mm internal concrete block wall which is plastered on bo... show full transcript
Worked Solution & Example Answer:A solid pine door and doorframe are shown in the accompanying sketch - Leaving Cert Construction Studies - Question 4 - 2010
Step 1
Show, using notes and neat freehand sketches, how to ensure that the doorframe is assembled square prior to fitting the door.
Answer
To assemble the doorframe square, follow these steps:
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Components of the Frame:
- The frame comprises two jambs and a head. The head is joined to the two jambs using a rebated butt joint.
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Joint Alignment:
- The head is first aligned and secured to the jambs. Ensure that it is level and attached correctly using screws.
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Square Measurement:
- Check the squareness using a large square. Place the large square against one jamb, ensuring that it makes contact with the head.
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Diagonal Measurement:
- Measure the diagonals from corner to corner. Both diagonal measurements should be equal.
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Bracing:
- Once squareness is confirmed, fit a brace in the corner within the rebate. This will help maintain the frame's square during installation.
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Cross Piece:
- Finally, a cross piece can be fitted to the bottom to ensure the frame remains square during the fitting of the door.
Step 2
Show, using notes and neat freehand sketches, how the doorframe is fitted in the block wall.
Answer
To fit the doorframe in the block wall, perform the following:
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Positioning the Frame:
- Place the door frame in the opening to ensure it fits properly. Check that the frame is plumb with the help of a level.
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Utilizing a Brace:
- Use a brace and spacer to hold the structure firm while you attach it.
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Fixing Procedure:
- Secure the frame using small wedges to align the frame and attach it to the wall.
- Fix special fixing brackets or wall bolts to fix the frame to the concrete block wall.
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Final Adjustments:
- Check again for plumb and square, making any necessary adjustments with spacers or shims.
Step 3
Sketch a suitable hinge for this door and show, using notes and neat freehand sketches, the steps involved in fitting one hinge to the door.
Answer
Steps to fit one hinge to the door:
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Hinge Selection:
- Choose a hinge suitable for the weight of the door.
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Marking the Position:
- Mark where the hinge will be positioned on the door edge. Generally, one hinge is positioned about 7 inches from the top and another about 11 inches from the bottom.
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Hinge Width Marking:
- Note the width of the hinge and mark the outline on the door edge where the hinge will sit.
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Preparation of the Hinge Recess:
- Use a router to create a recess for the hinge to sit flush with the door edge. A sharp chisel may help clean the edges.
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Positioning the Hinge:
- Place the hinge in the prepared recess and ensure it is level.
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Securing the Hinge:
- Finally, drill pilot holes and secure the hinge with screws.