CT5 Past Exam AUTUMN 2016QUESTION 1 LIGHT (10 marks in total) A. List and describe with diagrams three building components that can be used to increase the amount of usable daylight in a large floor plate office tower (5 marks). oWindows and SkylightsoWindows and potentially skylights (if location is on top level) allow natural light to enter a building through the ceilings and walls. Light provision will be constant throughout the course of the day from sunrise to sunset. The installation of taller and wider windows which is commonly seen in office towers, allow the full penetration of light into infrastructure. The placement of the windows must be carefully considered in order to minimise potential glare.This can be done through solar shading oBuilding DesignoThere are numeral design changes which are made and implemented in order to achieve the maximum amount of natural light penetration into a building which could also be referred to as solar orientation. Southern orientation on the widest surface of the home minimises summer exposure and maximises winter exposure. Other ways to incorporate natural light are light shelves, and lighter interior coloring to ensure maximum reflection value. You can also position landscaping to shade windows during the summer, while still admitting winter light.oBuildings are designed in a way that daylight is able to enter the rooms and hallways, with the building being considered shallow enough to allow the full penetration of light. oLight tubes and fibre opticsoThe use of steerable mirrors which direct light into areas it wouldn’t normally reach is a considerable option. As well as the use of optical fibres and light ducts which spread natural light throughout a building. Light ducts are tubular devices with a reflective film, channelling light from the roof of a building to the interior ceiling. They are smaller than skylights but still as effective. Fibre optic lighting devices send light through a bundle of optical cables into a building using a physical mechanism known as total internal reflection. This means light in the cables bounces around on the inside of the cable being transported as it reflects.
QUESTION 1 LIGHT (10 marks in total) B. When designing the layout of artificial lights for a large supermarket, what are the main performance factors that must be considered? (5 marks). There are a number of factors to consider when lighting a retail space; the size and shape of the space, the in- tended audience, and the intended message the brand conveys. Many elements come into play, such as color, reflection, contrast, and energy efficiency, that make aretail lighting design successful. Supermarket environments need to make the patrons feel comfortable while highlighting important merchandise and store areas. Simply increasing brightness is not only a waste of electricity, but is also not effective. Bright stores with lots of glare make customers uncomfortable and less likely to re- turn. The key is layering light and using contrast throughout the space.