O where the size of the duct permits access doors should be at least 18 inches x 16 inches in size.
Fire smoke damper access door requirements.
It is the control capability of the smoke control system damper that is different.
The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round.
Access doors are designed to provide entry to ductwork to access fire products.
In reality most of these fire and smoke dampers can be reached if you look a little harder.
Has provided underwriters laboratory approved fire dampers as well as other essential products for the h v a c.
Fire damper required smoke damper required typically ducts shall not penetrate fire walls but if allowed then damper is required no requirements stated in section yes unless penetration meets astm e119 or ul 263 or meets all of the following.
This can get facilities in trouble during ahj surveys.
Often times dampers get labeled inaccessible when access can t be located at first glance.
Nfpa 105 is the standard which prescribes the minimum requirements for smoke door assemblies and smoke dampers.
The system is more sophisticated and requires coordination among alarms sprinklers fans doors and dampers.
Products for over 35 years.
Lloyd industries has been an active manufacturer of access doors fire and smoke dampers and h v a c.
O where fire dampers are too large to allow them to be reset and the fusible link replaced from outside the duct the access doors should be increased to at least 24 inches x 16 inches in size to allow a person to enter the duct.
Some smoke dampers are aluminum whereas fire smoke dampers are galvanized or stainless steel.
Lss fire damper inspection and smoke damper inspection.
Maintenance of fire dampers ceiling dampers smoke dampers and combination fire smoke dampers requirements can be found in nfpa 80 standard for fire doors and other opening protectives and nfpa 105 standard for smoke door assemblies and other opening protectives.
Since the development of modern fire damper protection equipment lloyd industries inc.
Regular maintenance of fire and smoke dampers is required by the national fire protection association and the international building and fire codes and is enforced by authorities having jurisdiction ahj s such as the joint commission fire marshals and insurance risk auditors.
Wall is 1 hr or less building is fire sprinklered entire duct system is 26 ga.
In order to find access to some dampers it s important to thoroughly check the area for access doors.
Fire dampers must meet the ul555 test standard.
Pertinent information on maintenance is provided in annex b.
.jpg)
