Expected duration: less than 1 week Description Experience Level: Expert Estimated project duration: 1 - 2 weeks Assignment Brief for the Renovation and Expansion of Existing Construction Drawings in CAD Project: Vliegenstraat 61, Bunde
1. Objective of the Assignment The objective of this assignment is to update and expand the existing construction drawings of the property at Vliegenstraat 61 in Bunde according to current requirements and guidelines. The updated and newly created construction drawings must comply with the specific requirements of Dutch NEN standards and the guidelines specified in section 2.
2. Requirements for the Construction Drawings A. General:
Format: The drawings must be prepared in a scale appropriate for the type of drawing and for submission to the municipality. Scale: Scale 1:100 for floor plans and sections, and scale 1:50 for detail drawings. The legend, dimensions, and all other relevant information must be clearly legible. Format: All drawings must be delivered digitally in CAD format (DWG) and in PDF format for readability. NEN Standards: The drawings must comply with the relevant Dutch NEN standards, specifically: NEN 2580 for calculating and representing the floor areas and volumes of buildings. NEN 1068 for thermal insulation of buildings. NEN 7120 for the energy performance of buildings. NEN 1087 for ventilation of buildings. B. Modifications to Existing Drawings:
Floor Plans: Update the existing floor plans to reflect the new situation with the ridge extension, dormers, and fixed staircase. The attic must be included in the usable floor area calculation if it meets the requirements of NEN 2580. Sections: Update the sections to reflect the changes in the roof structure and the position of the new fixed staircase. Ensure that the height of the attic space and the modified roof structure are clearly indicated. Elevations: Adjust the elevations to show the extended ridge and the dormers. The Plastisol cladding must be correctly represented. Structural Details: Ensure that all structural elements, such as beams and support points, are clearly represented and calculated according to the applicable NEN standards. C. New Situation Drawings:
Ridge Extension: The ridge extension must be shown across the full width of the house (10.63 meters). Specification of materials used (e.g., Plastisol, ceramic roof tiles) must be clearly included. Dormers: Two dormer windows with dimensions 2800x1200 mm must be installed. The space between the dormers and the ends of the ridge extension should be filled and clad with Plastisol (RAL 7005). Fixed Staircase: Remove the existing loft ladder and replace it with a fixed staircase to the attic. Indicate the location, dimensions, and structural details of the new fixed staircase. D. Requirements for the Attic Space:
Usable Floor Area (NEN 2580): The attic must be included in the calculation of usable floor area, provided that the free height is at least 1.5 meters. Floor area under sloped roofs is fully counted from a height of 2.1 meters and partially (50%) from 1.5 meters to 2.1 meters height. Thermal Insulation (NEN 1068): The attic must meet the insulation requirements, with an Rc-value of at least 6.0 m²·K/W. Energy Performance (NEN 7120): The attic space must be included in the energy performance calculation of the house. Ventilation (NEN 1087): Ensure adequate ventilation in the attic space, with a minimum air change rate of 3.6 m³/h per m² of floor area.
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