Overhead Door Corporation Turns 99!

C.G. Johnson - Founder of Overhead Door Company™
Inventor of the overhead garage door & the garage door opener

As an official distributor, today we celebrate the 99th Anniversary of Overhead Door Company™!

Did you know that the overhead garage door was invented by our founder, C.G. Johnson, in the year of 1921?

Henry Ford introduced the very first inexpensive and reliable car in the early 1900’s. It was known as the Model T. From here, other car makes began to make affordable cars, which allowed more people to own cars.

In the past, people would keep their carriages and their horses in their carrier. These carriage houses were gradually replaced with garages as more and more people bought vehicles. At the early stages, garages had side panel doors that worked but not in the most convenient way as those doors needed twice as much space to open.

In 1921, C.G. Johnson invented and patented a sectional overhead door. This was the beginning of Overhead Door Corporation™.

Johnson drove to fairs and exhibits with a prototype door attached to his vehicle

To promote this new invention, Johnson drove to fairs and exhibits with a prototype door attached to his vehicle, the Model T. Johnson created a network of distributors with the help of clever marketing techniques, such as consumer coupons and bulletin boards in different communities. Five years later, Johnson gave the industry another useful piece of technology to help those who couldn't lift their doors manually: he invented the first electric garage door opener.

These two inventions laid the foundation for Overhead Door Company™, which has proven to be an industry leader. ​​His brand quickly​ gained a reputation for quality, service and integrity.

As an official distributor of Overhead Door Company™ we like to think that we still offer to our valuable customers high quality, extraordinary service and always maintaining our integrity.

Congratulations to our supplier for 99 years! We hope there are many more to come!

Overhead Door Company of The Meadowlands & NYC™

THE IMPORTANCE OF HAVING A MAINTENANCE PLAN FOR ROLL-UP DOORS

Sometimes roll-up doors can fail unexpectedly, endangering our workers.

Under normal operation, roll-up doors operate smoothly, so smoothly that most workers may not realize the hazard that a failed door can present.

Are you and your workers aware that your commercial garage door or your industrial door can easily weight more than half of a ton? Take a moment to analyze the potential danger if one of your roll-up doors fail, allowing it to free-fall and hit one of your workers.

Consequence of not giving a proper maintenance to your commercial doors

Most commercial doors and industrial doors do not have an auto-reverse feature, such as the Commercial Operator Bottom Sensors. These sensors stops and reverses the door upon contact with an obstruction, such as a person or an object.

Here are some simple examples of what could go wrong if your door doesn’t receive the maintenance that is required:

• The drive sprocket could disengage from the shaft, allowing the door to free-fall closed.
• As the door ascends from the top of the frame, the drive chain could jump the sprocket, allowing the door to free-fall closed.
• As the door is open, the chain can break, allowing the door to free-fall closed. At the same time the chain can also fall on the floor presenting a 2nd hazard.
• Without the proper maintenance, sometimes the motor of your door can keep working even after the door has been fully open or fully closed.

It is important to schedule regular inspections and maintenance, as well as adequate funding to support your preventive maintenance plans, and workers' continual situational awareness.

Investigations made by the Office of Environment, Health, Safety and Security (E.H.S.S.). revealed that most issues with the roll-up garage doors were caused because preventive maintenance had not been performed on the schedule recommended by the manufacturer due to lack of funding. Some other times it is simply as a result of the age and continuous use.

Because of their weight and design, roll-up doors require frequent evaluation and servicing to avoid malfunction and - by extension - possible injuries to you and the members of your staff.

RECOMMENDATIONS

These are some simple recommendations given by the Office of Environment, Health, Safety and Security (E.H.S.S.) for the safe operation of roll-up doors are provided as examples.

1. Regularly scheduled a preventive maintenance (PM).

2. Have adequate funding to support the PM program.

3. Offer training to workers, so they are aware of the roll-up doors hazards.

• Teach them to not stand or walk under a moving door; wait until it has stopped moving.
• Whenever possible, use a "personnel door" instead of walking under a raised door.
• Raise doors to the fully open position, which allows the door to travel to its upper limits and allows the spring to counterbalance the door and hold it in position.
• Keep the door in full view and free of obstructions while operating.
• Maintain awareness when walking or using equipment under or near a door stopped in the "up" position.

Finally, it is very important to allow only trained door technicians to install, adjust or perform maintenance to your roll-up doors.

Only trained technicians should install, adjust or give maintenance to your doors

HOW OFTEN SHOULD PREVENTATIVE MAINTENANCE BE SCHEDULED?

The frequency will vary according to the climate and other conditions under which the door regularly operates. Some preventative maintenance may be required monthly, while other types of maintenance should be undertaken every three to six months. To determine the best preventative maintenance schedule for your overhead doors or loading dock equipment contact The Overhead Door Company of The Meadowlands & NYC for a consultation.

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com

24 HR Emergency 1-201-273-7605

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.

LOADING DOCK INC. / OVERHEAD DOOR COMPANY OF THE MEADOWLANDS & NYC was awarded as the Subcontractor of the Year by the American Subcontractor Association.

Thank you to our customers, employees, suppliers, partners, mentors, friends, family & fellow NJSA members for supporting the growth of our organization. You believed in us!  Thank you!

General

This Technical Data Sheet provides facility managers with guidelines for evaluation of rolling fire doors designed and tested to provide the automatic closing fire protection indicated on the fire door label. The automatic closing of the door must be tested at the time the door is installed, and the door shall be inspected and tested not less than annually as required by NFPA 80. This requirement applies to all fire doors – even those that are not used and remain in the closed position. The doors must be checked regularly for conditions that may affect the operation of the door. DASMA recommends that the following procedures be observed:

Inspection:

• Inspect fire doors for damage to guides, curtain and endlocks, bottom bar, hood and operating mechanism.
• Refer to DASMA Technical Data Sheet #270 (“Recommended Rolling Door Maintenance Practice”)
• Refer to NFPA 80 (Standard for Fire Doors and Other Opening Protectives)
• Ensure that the door’s operating mechanisms, fuse links and release chain/cable are not painted, coated with dust or grease, and/or covered with debris.
• Open and close the door to inspect for any indications of damaged parts.
• Remove flammable substances on each side of the firewall opening near the fire door.

Droptest:

• Have a trained door systems technician perform an inspection and drop test of all fire door automatic closing features.
• Establish a contract with the door service provider regarding the cost of the inspection and drop test. Fire door deficiencies identified during the pre-drop test inspection should be corrected before the drop test. The drop test contract should acknowledge the fact that components may fail during the drop test that are not the fault of the service provider and are not included in the cost of the drop test.
• Document the drop test with the attached DASMA Drop Test Form.
• When subjected to drop testing, the door must close completely and rest on the sill. NFPA 80 states that the average closing speed must not exceed 24 inches per second and must be at least 6 inches per second.
• The door must be drop tested twice – once to verify proper operation and full closure, and a second time to verify that the automatic closing device was properly reset.

DASMA ROLLING STEEL FIRE DOOR DROP TEST FORM

General

NFPA 80 and Model Codes require the inspection and testing of fire doors to demonstrate proper operation, full closure, and proper reset. Perform the visual inspection before the operational check, or before the drop tests of the fire door, in order to reduce the risk of failure during the drop tests. Use the form below to record the Visual, Operational, and Drop Test results. Check Pass or Fail in the boxes. See the Guidelines for additional information.

The drop tests, reset, repairs and/or maintenance should be performed by a trained door system technician with complete knowledge of this type of fire door and the manufacturer's instructions. Repair parts must be obtained from the original door manufacturer. After repairs are completed, the door must be tested to assure proper door operation and automatic closing capability. The fire door must be in the fully open position before the drop test. Reset the door following the drop test and test again.

GUIDELINES

VISUAL INSPECTION:

Conduct a visual inspection for anything that may cause a hazard during testing or affect proper operation or resetting.

Verify that:

1. Mounting and assembly bolts are not missing or loose.
2. Welds and weld locations comply with installation method for fire door assemblies welded to steel jambs per manufacturer’s installation instructions.
3. Fusible links are located per manufacturer's instructions.
4. Guide assemblies have the required fire expansion clearance per manufacturer's instructions.
5. Fusible links and sash chain/cable links are not painted or coated with dust or grease, cable is not kinked or pinched, chain is flexible and not twisted, and raceways are not obstructed.
6. Smoke detectors/release devices function properly.
7. Nothing that is not a part of the fire door assembly is attached to any part of the fire door assembly (suspended ceiling, light fixtures, ducting, conduits, framing and any other building materials).

Check for damaged or missing components:

1. Slats – bent; tears or holes; metal fatigue.
2. Endlocks – missing; broken; bent; loose
3. Bottom Bar – bent angles; loose bolts.
4. Guide Assembly – bent angles or channels; loose bolts; curtain entry misalignment.
5. Hood (and Flame Baffle when required) or Fascia – bent; rubbing curtain; holes; loose fasteners; metal fatigue; missing intermediate supports (when required).
6. Automatic Closing Mechanism – missing, broken parts; drop or release arms tied, blocked or wedged.
7. Operating Mechanism – worn, misaligned or poorly meshed gears; worn roller chains; misaligned or loose sprockets; loose bearings; broken parts; bent shafts.

OPERATIONAL CHECK

Open and close the door using normal operation. If you find the door is not properly balanced, or there is damage or missing parts that may create a hazard or prevent proper operation, have these conditions corrected before conducting a drop test.

DROPTEST

A drop test is required to confirm that the fire door will close automatically during a fire emergency. Use manufacturer's drop test instructions. Door must be fully open before drop test. The door must close fully so the bottom bar rests on the sill. The average closing speed must be between 6" and 24" per second. Test each automatic closing option for the fire door.

RESET THE DOOR

Reset the door per manufacturer's instructions. Open and close the door by normal operation. Drop test the door a second time, and reset again.

Ultimate acceptance of a fire door is the decision of the authority having jurisdiction, as defined in NFPA 80.

Credit: DASMA Technical Data Sheet #271

Call the reliable technicians of Overhead Door Company of The Meadowlands & NYC today for  your rolling steel fire door service, repair or maintenance.

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.

At Overhead Door Co. of Meadowlands & NYC (Division of Loading Dock, Inc) we often receive requests for information on doors for special applications. One of the more common requests is for doors appropriate for the food industry. When considering doors and access systems for facilities serving the food and beverage manufacturing industry, consideration must be given to special features such as climate control and pest control. For interior doors some features that will most probably be on the list are:

• Compliance with food safety requirements: Look for a door that is easy to clean, perhaps with optional stainless steel structure.
• Reduction of contamination: Look for a door that offers rapid open/close cycle and tight seal keep out dust, dirt and pests.
• Conservation of energy: Look for a door that will assist in stabilizing temperatures with superior seal and rapid open/close cycle.
• Management of the cold chain: Select products that will allow the optimization of the production flow and control the cold chain.
• Minimization downtime: High performance doors often feature flexible material that will ‘breakaway’ if hit and can easily be reinserted in the tracking.
• Keeping people and equipment safe: Once again, the flexible curtain feature allows for a door without rigid elements which assists in preventing injuries and damages.

One manufacturer that offers a wide selection of appropriate products for this application is Rytec. This product line offers high speed, high performance doors specifically designed to meet the stringent requirements of the food processing environment. Rapid operation, automation, climate control, ease of maintenance, ease of cleaning – Rytec pays special attention to each of these areas of concern in the design of their high performance doors.

So, now we’ve got the interior access doors selected, but what about the exterior openings such as shipping and received areas? Overhead Door Company of Meadowlands & NYC offers products to cover all of these needs as well. The exterior is normally a bit less sensitive to regulation as shipping and receiving typically handles packaged product. Things to consider at the exterior include security, durability, climate control and rodent control. For loading dock, ramp or ground level doors we offer a broad range of products with the most popular being the Thermacore™ series by Overhead Door Corporation. This product line includes the 591, 592, 593 and 599 series. The construction is steel skinned polyurethane available in a variety of thicknesses to offer “R” and “U” values that will meet your specific needs. With full weather seal packages and upgraded rodent control bottom seals these doors offer a perfect solution.

Coiling door solutions are also available for these exterior applications but typically offer less climate and rodent control. The 625, 627 and 625s series from Overhead Door Corporation would be good examples of rolling or coiling door solutions.

In the case of the loading dock area dock leveler products may be required. While there are many options, in the case of food handling we most often recommend the vertical storing type such as the VSH Vertical Storing Leveler by W. B. McGuire. These levelers allow the dock door to close and seal completely rather than on top of the leveler leaving the customary gaps at the side of the leveler. This feature provides superior climate control and rodent control.

To complete the package we offer a full line of dock seal products, dock shelter products, awnings and truck restraints.

To learn more, contact one of our product specialists . We are always here to assist with product design and selection for projects in New Jersey and New York.

On November 18, the NJ Subcontractor Association recognized Loading Dock Inc/Overhead Door Company with the 2017 EXCELLENCE IN SAFETY AWARD for achieving the highest levels of safety by providing a safe environment for its employees and serving as a role model for the construction industry.
       

#Proud of my Mom & Dad for this award!
And #Proud of all our employees for being the BEST in the Metro NJ/NY region!

See our photos below from the 45th Annual Awards Gala that was attended by over 200 professionals in the construction industry.

Security Grilles offer optimal air flow and visibility.  In the past, you could only get a galvanized steel or alumunum mill standard finish on a grille's curtain.  Today, we can avoid the "jail house" look and over nearly 200 Tiger Drylac RAL color choices!

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com 
24 HR Emergency 1-201-273-7605

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.

Rolling Steel Fire Door Protection for Fire Wall Openings

Introduction

This document describes the rolling fire doors available from DASMA rolling door manufacturers that are listed by UL or ITS (W-H), or Approved by FM Approvals. These fire doors may be attached to the jambs of masonry and/or non-masonry walls in accordance with the manufacturer's listing/approval. The Life Safety Code, designated as NFPA 101, prohibits this type door in exit openings.

There are four basic types of rolling steel fire door protection for fire wall openings, which are each described in this Technical Data Sheet. All rolling steel fire doors are designed to close automatically in the event of a fire, and the great majority are equipped with a governor to control the closing speed.

1. Rolling Fire Door - A Rolling Fire Door consists of interlocking slats, a bottom bar, wall guides, a barrel assembly, an automatic release device, a governor, a hood, and a counterbalance mechanism along with supportive bracket plates. A Rolling Fire Door has an approval authority label, oversize label or oversize certificate with a fire rating. Typically, the fire rating is 4 hour, 3 hour, or 1-1/2 hour. A Rolling Fire Door may be used for both vehicular and pedestrian applications. Installation is covered in NFPA 80, Standard for Fire Doors and Other Opening Protectives, Chapter 11.

2. Rolling Counter Fire Door -  A Rolling Counter Fire Door consists of the same components as a Rolling Fire Door, with a smaller slat and smaller guides. The maximum fire wall opening is much smaller than for a Rolling Fire Door. A Rolling Counter Fire Door may close on sill angles, a masonry sill or on a labeled counter top. Installation is covered in NFPA 80, chapter 11. A Rolling Counter Fire Door can be used to close a conveyor opening or a pedestrian type wall opening.

3. Service Counter Fire Door - A Service Counter Fire Door will bear a "Service Counter Frame and Fire Door Assembly" label. The wall opening limit is approximately 10 feet wide by 6 feet high. Typically, the fire rating is 1- 1/2 hr or 3/4 hr. Installation is covered in NFPA 80, Chapter 13. A Service Counter Fire Door is limited to non-pedestrian type wall openings. Service Counter Fire Door construction is a door curtain consisting of interlocking slats integrally mounted in a four-sided frame to form a labeled door and frame assembly. A Service Counter Fire Door will bear a "Service Counter Frame and Fire Door Assembly" label. The wall opening limit is approximately 10 feet wide by 6 feet high. Typically, the fire rating is 1- 1/2 hr or 3/4 hr. Installation is covered in NFPA 80, Chapter 13. A Service Counter Fire Door is limited to non-pedestrian type wall openings. Service Counter Fire Door construction is a door curtain consisting of interlocking slats integrally mounted in a four-sided frame to form a labeled door and frame assembly.

4. Fire Shutter - A Fire Shutter is defined in NFPA 80 as a labeled door assembly for protection of a window opening in an exterior wall. A Fire Shutter can be a swinging door, a horizontal or vertical sliding door, or a rolling steel door. Installation is covered in NFPA 80, Chapter 12.

IMPORTANT - Rolling fire doors shall be inspected and tested annually to check for proper operation and full closure. (Ref: NFPA 80)

Note: Ratings determined by authorities having jurisdiction, in accordance with local codes.

Credit to Dasma Technical Sheet #266

Need assistance to ensure that you Rolling Steel Fire Door is in top condition, or do you need someone to install rolling doors?  Overhead Door Company of The Meadowlands & NYC can provide excellent repairs, installation and maintenance for your fire rated rolling doors.  

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com 
24 HR Emergency 1-201-273-7605

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.

PREVENTATIVE MAINTENANCE FOR ROLLING STEEL DOORS

BENEFITS OF PREVENTATIVE MAINTENANCE PROGRAM 

• Increase operational efficiency, safety and reliability
• Extend useful life of your equipment
• Reduce probability of equipment malfunctioning
• Decrease costly downtime
• Decrease long-term repair expense
• Establish relationship with experienced, service-oriented professionals
  
  

TROUBLESHOOTING GUIDE FOR ROLLING SERVICE DOORS

1. DOOR IS HARD TO RAISE BUT EASY TO LOWER. SOLUTION: Springs require more turns. Raise door to fully opened position and add spring tension (1/8 turn at a time) until the same resistance is felt lowering the door as is felt raising the door. Adjust tension wheel with steel winding bards 3’ long and diameter ½” or ¾”.

2. DOOR IS HARD TO LOWER BUT EASY TO RAISE. SOLUTION: Springs require fewer turns. Raise door to fully opened position and remove spring tension (1/8 turn at a time) until results listed in example 1 are achieved.

3. DOOR HANGS UP AT ENTRANCE INTO GUIDES. SOLUTION: a. Bellmouths might be out of position away from the headplate allowing endlocks to wedge. Loosen attachment nut and locate edge of bellmouth snug against headplate and tighten. b. Endlocks might have become loose and tilted out of position. Drill out loose fasteners and reattach with suitable fastener. c. Curtain might have been bent and damaged enough to wedge in guides. In some cases the bellmouths can be removed from the guide entrance and the curtain lowered outside of the guides and straightened. Be careful not to allow curtain to rapidly unwind off the counterbalance.

4. ELECTRIC OPERATOR STOPS TOO SOON; DOES NOT REACHT THE OPEN OR CLOSED POSITION. SOLUTION: Operator limit switch setting has become out of phase with the door. Reset the limit switches. See operator installation instructions for method of resetting limits.

5. OPERATOR DOES NOT RUN. SOLUTION: a. Verify that electric power is available to the operator. b. Verify 24 VAC control voltage form operator transformer. c. Verify condition of hoist interlock switch. d. Verify condition of slidebolt interlock switch.

RECOMMENDED PREVENTATIVE MAINTENANCE

To keep door in good working condition:

Every three months:

• Oil all moving parts except the clutch mechanism on fire doors and the wool pile in the guides on rolling grilles or counter doors. The guides should be lubricated with a paste wax or silicone spray.
• If electrically operated, check the operator gear reducer for oil leakage. If it is necessary to add oil, use Mobile Synthetic Oil (AGMA 7 #SHC 75W90).
• Check the tension of the roller chain between the operator and the door sprocket (see Figure A). If too loose, loosen the operator mounting bolts and slide the operator to tighten the chain (see Figure B). Retighten the operator mounting bolts.
• Oil the interior roller chain on operators without gear reducer.

Every six months:

• Oil all exposed roller chains, and on electric operators, dry lube the limit switch shaft threads.
• All bearings provided with grease fittings should be lubricated. If so equipped, find bearings located in the drive bracket and tension end of the counterbalance.
• Fire doors should be drop tested unless more frequent testing is required by other codes. Always use the Drop Test Instructions located inside the tension headplate cover.
• On crank operated doors and grilles, the crank assemblies are sealed with grease and should not require lubrication.

The above frequency of maintenance is for normal operation. Severe duty or unusual operating conditions may require modification of the times between maintenance.

 SCOPE OF WORK FOR ROLLING DOORS AND ELECTRIC OPERATORS

ROLLING DOORS: 

1. Inspect door alignment and level.
2. Inspect slats and endlocks for damage.
3. Inspect guides, bottom bar and hood for damage.
4. Inspect all weather-stripping for wear or damage.
5. Adjust spring and lubricate bearings.
6. Inspect and tighten fasteners.
7. Inspect and lubricate chain hoist.
8. Inspect locks for proper operation.
9. Inspect and tighten all sprockets and shaft collars.
10. Inspect safety labels, placement and condition.

ELECTRIC OPERATORS:

11. Inspect and adjust limit switches.

12.  Inspect and adjust belts.

13.  Inspect and adjust brake.

14.  Inspect gear reducer.

15. Inspect operator mounting.

16.  Inspect and test disconnect.

17.  Inspect and lubricate roller chain. 

18. Inspect and tighten all sprockets.

19. Inspect safety labels, placement and condition.

ROLLING STEEL FIRE DOORS:

20. Inspect fuse links and replace painted fuse links.

21. Drop test door for proper operation.

22.  Check that door is properly reset.

23.  Test electric fusible links for continuity (where applicable).

24. Test smoke detector (where applicable).

25. Test hold-open devices and time delays (where applicable).

26. Inspect safety labels, placement and condition. 

The expert servicemen of Overhead Door Company of The Meadowlands & NYC are always available to provide rolling door and fire door service; repairs, installation and maintenance to meet the needs of your business. Get the best Preventive Maintenance for your rolling doors. Click the "Schedule Service" below!

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com 
24 HR Emergency 1-201-273-7605

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.

Introduction

This Technical Data Sheet is intended as a reference for Building Maintenance Supervisors. It may be used as a guideline for periodic review of rolling doors to discover the most common, easily visible problems. In no way does it replace the regular maintenance recommended in the door manufacturer's instructions. Contact the door manufacturer to obtain information regarding a trained service provider and maintenance intervals. TDS-270 is intended as a supplement to DASMA Technical Data Sheet #269, Rolling Door Performance Evaluation.

Headplate Brackets

WARNING: Tension headplate brackets and counterbalance assemblies are under extreme spring tension and could result in death or serious injury.

1. Do NOT try to adjust the tension wheel (charge wheel). Call for service if spring needs adjusting.

2. Brackets should be oriented in the vertical plane and perpendicular to the wall; sway bracing may be necessary.

3. Brackets must be securely fastened to the wall or to the guide wall angles.

4. Call for service when expansion anchors appear loose in walls of masonry construction.

5. Call for service when bearing looks or sounds worn or damaged.

6. Watch tension bracket during operation. The tension wheel (charge wheel) and tension shaft must not rotate during operation of the door. Call for service if they rotate.

7. Inspect product safety label.

Guides

1. Wall angles must be secured to the jambs with fasteners in each slot.

2. Guide assembly fasteners must be secure in each hole/slot.

3. Guide gap must be uniform top to bottom.

4. Damaged/bent guide angles must not bind the curtain and bottom bar.

5. The stops at the top of guides must be in place and secured properly to stop the bottom bar at the top of each guide.

6. Inspect product safety labels.

Hood

1. Hood, if provided, must be properly secured so it will not fall.

2. Hood must not bind against the curtain.

Door Operation

1. Door should stay in the open position; call for service if door must be propped open.

2. Door should be easy to operate near the open and closed positions. Door will require more force to open through the middle.

3. Force required to open the door should not exceed 35 lbs. on hand chain or 25 lbs. on crank operation. Significant deviations from these values may indicate a counterbalance problem requiring service by a trained door systems technician.

4. Evaluate the performance of electric doors quarterly. If the electric operator sounds like it is laboring/straining to open the door, then do the following:

- Close the door using the operator, engage manual operation, and open the door.

- Call for service if the force required to operate the door is excessive. A spring counterbalance evaluation should be considered.

- Operator limits must be set so 1) bottom bar is not tight against guide stops and 2) curtain does not sag when closed.

5. The operation of the door MUST be viewable/visible from the door control switch location.

6. Per the requirements of UL 325, constant pressure is required on the “close” or “down” button/switch for doors with no sensing edge on door bottom bar, or with no photoelectric eyes, or when sensing devices are not functioning properly.

7. Test the door sensing devices at least weekly: - Be sure to test at both ends of sensing edge for proper operation. - See DASMA Technical Data Sheet #368 for more information.

8. Gear operated doors:

- Check that keystock is properly set in keyway

- Look for broken teeth and debris.

- Clean and lubricate gears.

- Tighten set screws.

9. Sprocket and roller chain drive:

- Check that keystock is properly set in keyway

- Align sprockets as required and tighten set screws.

- Inspect roller chain for damage or wear using DASMA Technical Data Sheet #268.

- Clean and lubricate the roller chain. See DASMA Technical Data Sheet #268.

Curtain Slat & Grille Rods

1. Close and open the door

2. The curtain/rods and bottom bar must move freely in the guides and not rub against the header or the opening in the ceiling.

3. Call for service if curtain endlocks or grille rods rub against the headplate bracket.

4. Endlocks and windlocks must be securely fastened to slat ends.

Product Safety Labels

1. Product safety labels should be periodically inspected and cleaned by the product user.

2. Replacement labels should be ordered from the door manufacturer.

Credit: DASMA Technical Data Sheet #270

The expert supertechnicians of Overhead Door Company of The Meadowlands & NYC are always available to provide repairs, installation and maintenance for your rolling doors.

For more information, please give us a call at 973-471-4060 or email us at: info@dockndoor.com 
24 HR Emergency 1-201-273-7605

We service Northern New Jersey (Bergen, Passaic, Hudson, Union, Essex, Morris, Hudson, Hunterdon, Middlesex, Mercer and Somerset county/counties), Manhattan, New York City, Brooklyn, Queens, Staten Island, Bronx, Westchester and Rockland.