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The main entrance to a dwelling house, as shown in the accompanying sketch, provides access for a person in a wheelchair - Leaving Cert Construction Studies - Question 1 - 2006
Question 1
The main entrance to a dwelling house, as shown in the accompanying sketch, provides access for a person in a wheelchair. The door opening is located in a 300mm exte... show full transcript
Worked Solution & Example Answer:The main entrance to a dwelling house, as shown in the accompanying sketch, provides access for a person in a wheelchair - Leaving Cert Construction Studies - Question 1 - 2006
Step 1
To a scale of 1:5, draw a vertical section through the external wall and door, showing clearly the threshold and the door.
Answer
To create a detailed vertical section at a scale of 1:5, begin by sketching the external wall, highlighting the 300mm external block wall with the insulated cavity. Next, depict the wooden door clearly, ensuring the threshold is represented. Include critical elements such as:
- Foundation: Draw a solid concrete base extending beneath the wall to provide support. Indicate its thickness and reinforcement details.
- Door Specifications: Show the wooden door positioning within the opening, labeled with its dimensions.
- Wall Details: Illustrate the external block wall, including insulation and any necessary moisture barriers. Label insulation with appropriate thickness.
- Finished Floor Level: Indicate the level of the finished flooring, ensuring to show the 300mm height above the foundation where the drawing concludes.
- Scale Indicator: Finally, note the scale clearly on the drawing to illustrate 1:5.
Step 2
Indicate on the drawing the specific design detailing that ensures that rainwater is removed from the threshold area and does not penetrate to the inner surfaces surrounding the door.
Answer
To ensure effective rainwater management in the design:
- Proprietary Threshold: Place a proprietary threshold at the base of the door, sloping towards the outside, facilitating drainage away from the entrance.
- Drainage Channel: Incorporate a drainage channel just behind the threshold to collect any water and direct it to suitable drainage.
- Damp Proof Course (DPC): Include a damp-proof course behind the threshold area, ensuring that water does not penetrate the wall structure.
- In-situ Concrete Cill: Draw a concrete cill with a slope of 15° max under the door, ensuring it channels water away.
- Finishing Details: Clearly indicate a 20mm quarry tile finish for the floor that also contributes to water runoff. Label the components in the drawing for clarity, showing how they work together to manage rainwater effectively.