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1. A closed-string wooden stairs leads to a landing with balustrade, as shown in the sketch - Leaving Cert Construction Studies - Question 1 - 2013
Question 1
1. A closed-string wooden stairs leads to a landing with balustrade, as shown in the sketch. The landing has a hardwood tongued and grooved floor, on 200 mm × 50 mm ... show full transcript
Worked Solution & Example Answer:1. A closed-string wooden stairs leads to a landing with balustrade, as shown in the sketch - Leaving Cert Construction Studies - Question 1 - 2013
Step 1
(a) To a scale of 1:5, draw a vertical section through the centre of the stairs and through the landing.
Answer
To create the vertical section:
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Draw the Overall Structure: Start by sketching the overall layout of the stairs and landing at a 1:5 scale. Ensure that the dimensions reflect the typical sizes given in the marking scheme.
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Add the Stairs: Include the top three steps, ensuring each riser does not exceed 175 mm in height. Draw the risers and treads accurately to scale, with a thread width of approximately 225 mm.
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Incorporate the Landing: Design the landing area with a minimum length of 500 mm as specified. Sketch the hardwood floor and the joists underneath.
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Include the Newel Post and Handrails: Draw the newel post (100 mm × 100 mm) at the landing's edge. Add balusters (40 mm × 40 mm) spaced evenly along the railing, and ensure the handrail is between 60 mm and 120 mm in height above the stairs.
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Highlight Structural Members: Ensure to indicate key dimensions standard to stair design, such as the placement of the handrail, plus any necessary saddle pieces or trimmers.
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Finalize the Drawing: Review and refine your drawing, ensuring all features are coherent and accurately represented to the scale.
Step 2
(b) Indicate on your drawing two design features that ensure that the stairs is safe for all users.
Answer
To ensure the safety of users on the stairs:
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Handrail Design: The handrail should be continuous and at a height that is easily reachable for all users. It must extend beyond the top and bottom stair for additional support. Ensure it is designed to prevent hand slipping and provides adequate grip.
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Non-Slip Treads: The surface of the treads should be designed with a non-slip material or incorporate a textured finish to minimize the risk of slipping, especially in high-traffic areas or where moisture may be present.