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A dwelling house has an open-plan kitchen and dining area on the ground floor, as shown - Leaving Cert Construction Studies - Question 1 - 2017
Question 1
A dwelling house has an open-plan kitchen and dining area on the ground floor, as shown. The kitchen has a solid concrete floor with a 20 mm tile finish. The adjoini... show full transcript
Worked Solution & Example Answer:A dwelling house has an open-plan kitchen and dining area on the ground floor, as shown - Leaving Cert Construction Studies - Question 1 - 2017
Step 1
(a) To a scale of 1:10, draw a vertical section through the external wall of the kitchen and through both the concrete and timber floors.
Answer
- Foundation Detailing: Start by drawing the strip foundation, which typically has dimensions of 1200 mm x 400 mm. Ensure you accommodate for a typical depth of 1000 to 1200 mm below ground.
- Concrete Floor Section: Illustrate the solid concrete floor with a specified thickness of 25-35 mm. Include embedded reinforcement, typically 12 mm mild steel bars at 100 mm centres. Finish off with a tile surface.
- Wall Construction: Represent the external wall which consists of a 400 mm concrete block outer leaf with a full-fill insulated cavity of 200 mm. Optionally, include basalt board for low thermal conductivity.
- Timber Floor Details: Draw the suspended timber floor in the dining area. Show 20 mm tongue and groove hardwood flooring supported on 200 mm x 40 mm joists, spaced at 400 mm centres. Include insulation beneath the flooring structure.
- Abutment of Floors: Indicate how both floors meet, ensuring the vertical section transitions smoothly with appropriate insulation detailing and finishes. Label all key dimensions, ensuring a width of 1.5 meters is shown for both floors.
- Final Touches: Lastly, ensure all components are labeled clearly, including the heights and insulation details, to provide a comprehensive understanding of the construction details.
Step 2
(b) On your drawing show the typical design detailing for the cross ventilation of the suspended timber floor through the solid concrete floor.
Answer
- Ventilation Openings: Begin by showing openings in the external wall of the kitchen, keying in on how they allow air to flow through to ventilate the timber floor. Include appropriate size and placement—typically around 75-100 mm typical.
- Ducting or Grills: Illustrate ducts or grills that facilitate the airflow from outside to the space beneath the suspended timber floor. These should be clearly labeled with dimensions.
- Layout Representation: Ensure to represent the layout of the ventilation routes, showing how air moves freely under the suspended timber floor, preventing moisture buildup and ensuring effective ventilation.
- Material Consideration: Mention the use of a muscle board or mesh to protect the openings from pests while allowing airflow.
- Finalize Drawing: All elements must be detailed adequately, ensuring clarity in how ventilation integrates with the overall floor design.