Bullet proof doors can be a common choice for many commercial residences. Hospitals are one of the most popular institutions who prefer bullet proof doors. This is to ensure the safety of patients, especially hospitals in high crime areas.
Bullet resistant doors can be made to resist a wide range of bullet calibers. This can range from light hand guns to high caliber rifles. curtain wall door Many times, bullet proof doors are also sound resistant. These specialty doors help meet specific requirements and objectives on various types of projects. Many facilities, including banks, financial institutions, government buildings, and court houses are common projects requiring bullet resistant doors.
Sound resistant doors are found in legal facilities, recording studios, sound stages, and equipment rooms. These doors are designed and custom built for each project and application. They are available in different sizes and types determined by the application, engineering, and architectural requirements.
Sound resistant doors contain STC ratings of up to 54 and above depending on the application.The STC stands for Sound Transmission Class. This is a single number rating of a material's or an assembly's ability to resist airborne sound transfer at frequencies of 125 to 4000 Hz. A higher STC rating blocks more noise from transmitting through a partition.
STC is dependent on the construction of the partition. This can be increased by adding mass, increasing or adding air space, or by adding an absorptive material within the partition. An STV rating over a range of 16 different frequencies is consistent with the range of speech. The STC rating does not assess the low frequency sound transfer.
Special consideration should be given to spaces where the noise transfer concern is other than speech, such as mechanical equipment or music. Even with a high STC rating, any penetration, air-gap, or flanking path can degrade the isolation quality of a wall. Flanking paths are the means for sound to transfer from one space to another other than through the wall.
Sound can flank over, under, or around a wall. Sound can travel through ductwork, plumbing, or corridors. Noise will travel between spaces at the weakest points. These weak points need to be improved before installing a sound proof or bullet proof door.
Bullet proof doors are built and shipped as drop in units. Sometimes, business owners think of them as a drop in security solution. The door is only as good as the security system it is going to be integrated into. Each door system should be designed to stop bullet and easy day to day operations.
Bullet proof doors are more effective when they are placed next to walls that are inherently bullet resistant. This can be cinderblock, brick, or poured concrete. If the wall is not, then it will need to be backed with bullet resistant fiberglass. Windows near the doors need to be replaced with ballistic glass.
The most common type of bullet proof door is a traffic door. These can be impact doors, swing doors, and double acting doors. They are a cost effective solution for fast and efficient two way movement through an opening where visual, sound, and environmental barrier are required. The most popular uses for these doors are in hospitals, restaurants, hotels, and manufacturing companies.
Bullet proof doors are not the only kinds of specialty doors that businesses can use. Specialty doors can also include air curtains and doors, high speed doors, and impact doors. There are also drive-through and pass-through windows that act as an automatic door system. Cold storage doors are a popular specialty choice and can often be bullet proof as well.
Roof hatches and access doors are very specialty, custom designed for each business' purposes. Some of these door installation services also offer welding services, board up services, and glass replacement.