Construction Technology Updates

Performance of Tubular Daylighting Devices

Tubular daylighting devices (TDDs) can economically admit natural light into areas of buildings that do not have windows or skylights. This Update outlines the features and characteristics of TDDs and presents research findings that will improve the ability of manufacturers to design and rate their products. It will also help specifiers select best-performing products for particular locations and installation geometries. Full story


Demand-Responsive Commercial Buildings

To reduce the electrical generation required to meet peak demands and maintain grid stability, utilities are implementing policies and mechanisms to lower usage during peak periods. This Update discusses one strategy known as demand response, whereby customers get direct requests from the utility to temporarily lower usage during periods of very high demand. Full story


Building Egress Using Photoluminescent Markings

The use of photoluminescent material systems in buildings is gaining acceptance in North America as a valuable safety feature for users of exits and stairwells in the event of power failure and the loss of emergency lighting. This Update describes the characteristics and installation of photoluminescent markings. Full story


Performance of Solar Shading Devices

This Update describes results of research on several types of window shading devices and their potential to reduce heating and cooling energy consumption and improve conditions that affect occupant comfort. The information provides guidance in the selection of shading devices for particular housing types and energy cost situations. Full story


Advances in Fire Suppression Systems

Fire suppression systems for the protection of buildings have evolved in response to new requirements, environmental pressures and advances in technology. This Update provides an overview of four recently developed systems, reviews research on the performance of each, and provides guidance on system selection, design and use. Full story


Fire Performance of Fibre-Reinforced Polymer Systems Used for the Repair of Concrete Buildings

This Update reviews NRC-IRC research on the fire resistance of externally bonded, fibre-reinforced polymer (FRPs) systems used for repairing concrete building members. The research showed that FRP systems that include specially designed insulation can enable repaired or strengthened concrete members to exceed the 4-hour fire resistance requirements of building codes. Full story