Photo AI
The sketch shows a portion of the external wall and the first floor of a two storey dwelling house - Leaving Cert Construction Studies - Question 1 - 2014
Question 1
The sketch shows a portion of the external wall and the first floor of a two storey dwelling house. The external wall is a 350 mm concrete block wall. The cavity is ... show full transcript
Worked Solution & Example Answer:The sketch shows a portion of the external wall and the first floor of a two storey dwelling house - Leaving Cert Construction Studies - Question 1 - 2014
Step 1
To a scale of 1:5, draw a vertical section through the external wall and the first floor.
Answer
-
Begin by drawing the external wall as a 350 mm concrete block structure. Indicate the wall's cavity filled with blown polystyrene beads.
-
Illustrate the first floor showing the floating tongued and grooved hardwood floor supported by 20 mm plywood on top of the 225 mm × 40 mm joists.
-
Add the plasterboard ceiling beneath the joists, ensuring to show the dimensions correctly scaled at 1:5.
-
Focus on construction details from a level 300 mm below the plasterboard ceiling down to a level 400 mm above the finished floor. Ensure typical dimensions are clearly marked in your drawing for clarity.
-
Label elements such as floor joists, plywood, and insulation, and include markers for the width of the floor, which should show 1.0 metre.
Step 2
On your drawing show one method to prevent the floor joists from twisting.
Answer
-
Indicate a method of installing herringbone bracing between the joists. This consists of diagonal members that connect between joists at regular intervals to enhance stability and help resist twisting.
-
Label the herringbone bridging clearly indicating it is 50 mm × 40 mm typical or proprietary metal bridging.
-
Alternatively, show solid bridging layout, which consists of 225 mm × 40 mm typical dimensions between joists for additional support against twisting.