Beyond the door material, another important decision is determining whether a more sophisticated door system is required for the application. In the MasterFormat section 08 30 00, Specialty Doors and Frames, a number of door types are listed for special functions, access locations, sliding and folding hardware, and even pressure-resistant types. Among these, there are several mentioned by Building Teams for consideration today:
• Pivoted or hinged doors. Both pivots and hinges can be used interchangeably, although hinged, prefabricated doors are generally less expensive. The presentation of the door types is the key factor. A hinged door typically reveals a knuckle spanning 4½ inches, while a pivot door’s profile is much smaller, with a 1½-inch knuckle. (Means Illustrated Construction Dictionary defines a door knuckle as “one of the enlarged, protruding, cylindrical parts of a hinge through which the pin is inserted.) The pivot door also offers a higher level of durability, making it a common choice for commercial applications.
• Balanced doors. Ideal for windy climates, a balanced door is a more sophisticated, engineered system for exterior entrances. “The balanced door system is a complete assembly where the hanging and closing of the door is controlled by the door system, negating some of the effects of excessive wind conditions,” says Jim Berg, a veteran door systems consultant.
If a balanced door isn’t in the budget, then pivoted or hinged doors need to be designed with higher opening and closing forces, as more of the door leaf is exposed to the wind.
• Automatic and revolving doors. Automatic doors are commonly used to meet the requirements of the Americans with Disabilities Act, or simply to handle highly trafficked entrances, as in hospitals and grocery stores. Because the price difference between automatic and revolving doors is substantial, revolving doors are usually reserved for buildings with significant weather requirements.
Revolving doors can also be helpful in mitigating the effects of strong negative and positive air pressures created by the HVAC systems and outdoor conditions, which cause wear and tear to a typical door. Consequently, the number of service calls is reduced with revolving or vestibule door systems.
According to Studio 08 Principal Rick Lewis, the most common type of revolving door is the single-post door. However, “Many of the airports are now using a type that allows more people to be in the door unit at one time, to move more traffic,” he says. Today there are small, three- and four-wing models for lower-traffic applications, while the large, two-wing or three-wing automatic revolving doors are more common in retail centers, hospitals, and transportation centers.
In most applications, a low-energy power operator meeting ANSI A156.19 (Standard for Power Assist and Low Energy Power Operated Doors) is specified as an ADA-compliant installation. However, for industrial settings, a heavy-duty power operator compliant with ANSI A156.10 (American National Standard for Power Operated Pedestrian Doors) is used. The industrial types are often specified with a ramp and guides, as the doors generally don’t stop and reset if a person or object enters the sensory field.
While the lower energy operators do stop and reset, this action can eventually wear down the mechanism. “Currently, manufactured units are considerably better than the ones that first came out 20 years ago,” says Lewis. “However, an ANSI A156.10 unit requires a lot of maintenance because the door operator is used each time a person, cart, or motorized vehicle passes through the opening.” Lewis says there is considerable power and momentum in the door as an operator is functioning, and “this causes not only the operators to receive a lot of abuse, but also the doors and frames.”
While retrofitting ordinary doors into automatic doors can be difficult and expensive, there are cases where there is no way around the problem for certain types of buildings, such as churches, temples, mosques, and other religious institutions, which are now required by ADA standards to update their access points. +
Related Stories
Data Centers | Oct 31, 2022
Data center construction facing record-breaking inflation, delays
Data center construction projects face record-breaking inflation amid delays to materials deliveries and competition for skilled labor, according to research from global professional services company Turner & Townsend.
School Construction | Oct 31, 2022
Claremont McKenna College science center will foster integrated disciplinary research
The design of the Robert Day Sciences Center at Claremont McKenna College will support “a powerful, multi-disciplinary, computational approach to the grand socio-scientific challenges and opportunities of our time—gene, brain, and climate,” says Hiram E. Chodosh, college president.
Energy Efficient Roofing | Oct 28, 2022
Rooftop mini turbines can pair with solar panels
A new type of wind turbine can pair well on roofs with solar panels, offering a double source of green energy generation for buildings.
Building Team | Oct 27, 2022
Who are you? Four archetypes shaping workspaces
The new lifestyle of work requires new thinking about the locations where people work, what their workflow looks like, and how they are performing their best work.
Codes and Standards | Oct 27, 2022
Florida’s Surfside-inspired safety law puts pressure on condo associations
A Florida law intended to prevent tragedies like the Surfside condominium collapse will place a huge financial burden on condo associations and strain architecture and engineering resources in the state.
University Buildings | Oct 27, 2022
The Collaboratory Building will expand the University of Florida’s School of Design, Construction, and Planning
Design firm Brooks + Scarpa recently broke ground on a new addition to the University of Florida’s School of Design, Construction, and Planning (DCP).
Building Team | Oct 26, 2022
The U.S. hotel construction pipeline shows positive growth year-over-year at Q3 2022 close
According to the third quarter Construction Pipeline Trend Report for the United States from Lodging Econometrics (LE), the U.S. construction pipeline stands at 5,317 projects/629,489 rooms, up 10% by projects and 6% rooms Year-Over-Year (YOY).
Data Centers | Oct 25, 2022
Virginia county moves to restrict the growth of new server farms
Loudoun County, Va., home to the largest data center cluster in the world known as Data Center Alley, recently took steps to prohibit the growth of new server farms in certain parts of the county.
Museums | Oct 25, 2022
Seattle Aquarium’s new Ocean Pavilion emphasizes human connection to oceans
Seattle Aquarium’s new Ocean Pavilion, currently under construction, features several exhibits that examine the human connection with the Earth’s oceans.
Energy-Efficient Design | Oct 24, 2022
Roadmap shows how federal buildings can reach zero embodied carbon emissions by 2050
The Rocky Mountain Institute (RMI) has released a roadmap that it says charts a path for federal buildings projects to achieve zero embodied carbon emissions by 2050.