Code Required Testing of Life Safety Dampers

    Posted on Wed,May 22, 2019 @ 04:00 PM

    Building codes require the installation of life safety dampers for several purposes. Most are used to prevent the spread of heat, fire, and/or smoke in a life-threatening event. There are four essential types of life safety dampers:
    1) Ceiling radiation
    2) Fire
    3) Smoke
    4) Combination fire and smoke

    Three general applications:
    1) Compartmentation to prevent heat, fire or smoke transfer across barriers
    2) Smoke control systems to prevent smoke movement within spaces or exhaust to the outside
    3) Fire extinguishing or evacuation systems

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    Tags: Technical Tips, Fire and Smoke Control

    New Fire and Smoke Actuator Offering Higher Torque and Temperature

    Posted on Tue,May 17, 2016 @ 09:00 AM

    Belimo Americas launches the new FSAF*A high torque fire and smoke damper actuators.  The FSAF*A electronic actuators are integrated into a life safety control system on smoke and combination fire and smoke dampers. This protects against dangerous low temperature smoke that is produced before fire breaks out and the large quantities of smoke generated in fully developed fires.  The primary result is fast smoke containment so that occupants are able to egress a building fire safely. Additional benefits are less smoke damage to furnishings and property and increased visibility for fire fighters.

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    Tags: Belimo News, Fire and Smoke Control

    Active Safety with Motorized Fire and Smoke Dampers

    Posted on Mon,Mar 07, 2016 @ 10:00 AM

    Ensuring the safety of human life and property in buildings is one of the toughest demands that planners, builders, owners and operators are called upon to face. Smoke related injuries and deaths outnumber fire related injuries and deaths four to one. This is a rising concern for the safety of people and fire fighters who need to travel through building emergency exit routes as quickly as possible.

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    Tags: Fire and Smoke Control

    Modulating Control of Fire & Smoke Dampers in Smoke Control

    Posted on Tue,Aug 19, 2014 @ 10:00 AM
    Introduction

    In the US, Canada, and Latin America fire, smoke, and combination fire and smoke dampers are used in two general categories:
    1. Containment of fire and/or smoke to maintain building compartmentation. These are installed based on Chapter 7 of the International Building Code (IBC) which is the primary model code. These are sometimes referred to as passive systems although the dampers do close and fire alarms operate when a smoke detector operates.
    2. Engineered smoke control systems use dampers, fans, and some architectural features in a wide variety of applications. These are based on Chapter 9 of the IBC.


    In the Americas smoke dampers are always actuated; fire dampers use mechanical means of sensing heat (fusible links that melt and gravity or spring release for closure). They and can be actuated for ease of periodic inspection and maintenance. Smoke must be sensed using electrical sensing – smoke detectors. Spring return actuators are used to close the dampers and then the actuator motor used to open the damper. Combination fire and smoke dampers are actuated due to the smoke function.

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    Tags: Technical Tips, Fire and Smoke Control

    A Method of Damper Control for Corridor Ventilation and Smoke Extraction

    Posted on Tue,Aug 05, 2014 @ 10:00 AM

     

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    Tags: Technical Tips, Fire and Smoke Control

    Code Required for Testing of Fire, Smoke, and Combination Dampers

    Posted on Mon,Sep 30, 2013 @ 10:00 AM

    Periodic testing of life safety systems and dampers is required by the codes. While there is some state or local variation, the requirements are shown in Chart 1. While the focus of this article is the dampers, the entire smoke control system is required to be tested according to the schedule labeled “Smoke Control Systems & Dampers.” A clear distinction must be made among the damper applications in order to determine the schedule that conforms to codes. The second part of this article explains the differences among the dampers and applications.

    Chart 1: Periodic testing requirement for dampers.

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    Tags: Fire and Smoke Control

    Dampers and Airflow Control

    Posted on Mon,May 27, 2013 @ 10:00 AM

    Allow us to recommend this publication: Dampers and Airflow Control written by Laurence G Felker and Travis L Felker provided by ASHRAE Special Publications.

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    Tags: Fire and Smoke Control

    Dampers, Mixing, Geometry, and Pressure Loss

    Posted on Mon,Apr 15, 2013 @ 10:00 AM

    A damper restricts airflow by obstructing the duct. Some multi bladed dampers have flanged frames to which ductwork is butted, and the open area is restricted only by blades and hardware. Most dampers in the U.S. are inserted into a sleeve, duct, or wall, and the frame obstructs part of the open area. The maximum free area for this type is about 80% for 48 x 36 in. (1200 x 900 mm) and larger-size dampers, and the minimum is about 40% for an 8 x 8 in. (200 x 200 mm) damper. The frame takes up most of the reduced space. The free area changes slightly with comer braces, linkage in airstream versus frame, airfoil versus triple V, and with type of frame. In round dampers, the blade is the only significant restriction.

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    Tags: Fire and Smoke Control

    Pressure Losses Through Dampers

    Posted on Mon,Feb 18, 2013 @ 10:00 AM

    The pressure loss through any damper is a function of the entering flow profile, the free area ratio, F,  of the open damper area to that of the damper frame or wall area, the geometry of the damper installation, and the exit conditions as air leaves the damper. The most complete testing of dampers was performed for ASHRAE’s Research Project 1157. A complete analysis of the results is available in the book Dampers and Airflow Control published by ASHRAE Special Publications. Not only the full open losses, but also the modulating characteristics of dampers are experimentally defined.

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    Tags: Fire and Smoke Control

    Smoke Control Tactics

    Posted on Mon,Dec 17, 2012 @ 10:00 AM

    Where strategy looks at the overall picture, the individual tactics are used to achieve the goals.  The main purpose of the booklet "Actuator Dampers in Smoke Control Systems" is to explain details of how these mechanical and electrical systems operate with respect to dampers.  The Fire Marshals, Building Officials, design engineers, and contractors are often called upon to go beneath the overall operation of a subsystem and look at the details.
    Where devices and wiring interconnect two disciplines, there is a tendency for those involved to have only a fuzzy concept of the whole, interrelated design.

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    Tags: Fire and Smoke Control

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