Frequently Asked Questions
We have tried to answer as many common questions regarding our products as possible. If your question is not answered here, simply follow the "Ask My Question" links to fill out and submit a form with your inquiry. One of our professionals will be happy to give you an answer.
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What is a Traffic Door?
A traffic door is a double acting door that provides a barrier between two areas. This "barrier" can be visual, thermal, or both. "Double Acting" means that the door swings in either direction. Traffic doors are designed to be opened by impact. The type of traffic and the function that the door is to serve will help you determine the product to be used.
Is there another name for a Traffic Door?
Yes, the most common names are: Impact Doors, Double Acting Doors, Bump Doors, Swinging Doors,
Sheet Doors, Double Swinging Doors.
Why use a Traffic Door?
Traffic doors are an excellent choice for applications where a high volume of traffic exists and minimal infiltration is desired. Doors serve as a barrier. This barrier can be thermal, visual, sound, environmental, or secure.
How wide a load can go through the opening?
As a rule of thumb, the largest load that should pass through an opening is 70% of the total width.
Are there options for loads exceeding 70% of the opening width?
Yes, you can purchase a flexible traffic door, upgrade to a more durable door, provide swing limiting posts,
or automate the door.
What is a "Teardrop Bumper"?
Teardrop bumpers act as a "shock absorber" and protect the door panel from impact by forklifts, pallet jacks,
and carts.
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Which applications require fully hydraulic rather than mechanical levelers?
Hydraulic dock levelers, although higher in
initial cost, have proven to provide lower lifetime cost due to lower maintenance requirements. Added benefits
of fully hydraulic dock levelers include smooth, quiet operation at the touch of a button and automatic
return to cross traffic position. For operator convenience and years of trouble-free service, fully
hydraulic dock levelers are suggested for all applications
Talking about capacity I have heard the terms STATIC, ROLLOVER, and DYNAMIC being used. Which rating should influence my leveler selection?
Static and rollover refer to the amount of weight that a dock leveler can safely support, either stacked on the
deck or crossing over it, while in the stored position. Dynamic capacity refers to the total force of a rolling
load that a dock leveler can safely support while in the extended or service position. This dynamic rating
should be used when selecting your dock leveler, since it is the only method that considers true, live
working conditions.
Are all dock levelers structurally alike?
Absolutely not. Even dock levelers with the same capacity rating vary greatly in design. The structural integrity
of a dock leveler, like that of a bridge, is determined not by the top surface, but by the type of
reinforcement underneath. The deck supports in general use today range from light gauge formed shapes to
structural I beams. A rational comparison is crucial. Remember that a modern dock leveler has to be able
to withstand the dynamic force of a fully loaded lift truck, constantly hitting it
at up to 6 m.p.h. (10 k.p.h.), without the deck dishing. We use structural “C” channel as deck
support on all of our pit levelers.
What do you mean by "dishing"?
Dishing is the term used to describe the condition where a dock leveler deck plate, that has inadequate
structural support, has distorted. The deck has waves in it that are a clear sign that the steel is
dangerously stretched and fatigued. Preventing dishing is the reason a dock leveler’s deck structure,
particularly the type, number and placement of beams, is so important.
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