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Q What Minimum Order Quantity (MOQ) does D&D Hardware require?
A We set the MOQ by product type. For standard stainless steel hinges and door closers, the MOQ is typically 100-500 units per item. For customized products or special surface finishes, the quantity is negotiable and usually ranges from 200 to 1,000 units. For samples, we usually provide 1-5 units, and a sample fee may apply, which can be refundable after a bulk order.
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Q According to European standards, which D&D Hardware components are typically required for a 120-minute fire-rated timber door?
A We typically recommend fire-rated hinges certified to EN 1935, fire-rated locks certified to EN 12209, fire-rated door closers certified to EN 1154, and fire-rated exit devices certified to EN 1125 for a 120-minute fire-rated timber door under European standards.
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Q Which stainless steel hinge does D&D Hardware recommend for heavy-duty metal fire doors in high-traffic commercial buildings?
A We recommend heavy-duty stainless steel hinges that comply with UL and BS EN fire safety standards, such as our 180-minute and 260-minute fire-rated hinges. We select these hinges for durability, load-bearing capacity, and suitability for high-traffic commercial fire door applications.
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Q Does D&D Hardware offer door hardware scheduling and specification writing services?
A Yes, we provide free technical support for door hardware schedules and specifications. We ask customers to send floor plans or door lists, and we respond within 48 hours.
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Q What materials does D&D Hardware use, and does D&D Hardware provide material certificates?
A We mainly use SS 304 and SS 316 stainless steel, with marine-grade material available. We provide Mill Test Certificates, Salt Spray Test Reports for performance over 240 hours, and Hardness Test Reports, supporting full traceability from raw materials to finished products.
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Q What application scenarios are D&D Hardware products suitable for?
A We supply door opening solutions for educational institutions, healthcare facilities, hotels, government buildings, apartment complexes, and commercial applications. We design our product range to support a wide variety of building and project requirements.
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Q What architectural hardware product categories does D&D Hardware manufacture?
A We manufacture architectural door hardware products, including stainless steel door hinges, door locks, handles, door closers, exit devices, door stops, door bolts, and related door accessories.
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Q What IQC, IPQC, and OQC quality control processes does D&D Hardware use?
A We follow strict quality control processes, including Incoming Quality Control (IQC), In-Process Quality Control (IPQC), and Outgoing Quality Control (OQC), to manage product quality at every stage.
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Q Does D&D Hardware support factory audits or video inspections?
A Yes, we support factory audits and video inspections so customers can verify our production capabilities, quality management systems, and factory scale.
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Q Which countries and regions does D&D Hardware export to, and does D&D Hardware have project references?
A We export to more than 30 countries and regions, including Europe (UK, Germany, France), the Middle East (UAE, Saudi Arabia, Qatar), North America, South America (Colombia, Chile, Brazil), Asia (Singapore, Malaysia, Vietnam), and Australia. We have project references in five-star hotels, commercial buildings, hospitals, airports, and government buildings.
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Q When an exit device is not functioning properly, what problem could it be causing that?
A When an exit device is not functioning properly, the problem usually can be traced to one of the following factors:
• Poor fitting or alignment of door and frame
• Wrong lock or case
• Door prepared incorrectly
• Frame and/or door reinforcement incorrect
• Improper cylinder or installation
• Not mounted level
• Latch case not aligned
• Vertical rods not aligned
• Fasteners of wrong length
• Fasteners too loose or tight
• Operating trim not installed properly or binding
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Q How do we know when we shall use fire exit hardware?
A The requirement for using “exit device” or fire exit hardware usually is based on the occupancy classification of the building or area and the occupant load (quantity of persons using the facility).
The National Fire Protection Association (NFPA) publishes the Life Safety Code, which designates when exit devices are required to be used in a building or space.
• Exit devices are required to be used on openings serving an occupant load of 100 people or more, and high hazard areas with occupant loads of 5 or more.
• NFPA 101 requires fire exit hardware to be installed on fire-rated openings in a means of egress.
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Q What are the factors that influence the choice of exit device?
A The following lists a few of those factors.
1. Door Design
2. Door Size
3. Door Glazing
4. Building Code and Owner Requirements
5. Overlapping Astragals
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Q What finishes are available for panic bars?
A Our panic bars are available in a variety of finishes, such as satin, polish, black, gold, powder coating, steel painted etc.
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Q What material is the panic bar made of?
A It is available in stainless steel 304 and painted steel.
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Q D&D panic bar suitable for what size of doors?
A Suitable for doors width from 650mm to 1000mm, door thickness from 44.5mm to 50mm, standard door height is 2100mm (door higher than standard, please contact D&D).
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Q What standard/grade does D&D Panic Bar followed and achieved？
A D&D panic hardware has tested to UL 10 C, up to 3-hour fire rated. Comply to ANSI BHMA A156.3 GRADE 1 - 500,000 cycles tested.
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Q How many designs of exit device are available?
A Exit devices are available in two design styles:
The contemporary touch bar type
The touch bar type usually is a one-piece assembly consisting of a rectangular body extending from the lock stile to the hinge stile. A portion of the body protrudes away from the unit, acting as a touch bar (touch pad/contact from the unit, acting as a touch bar (touch pad/contact surface). Pressure against this touch bar will retract the latch or vertical rods at the end of the assembly.
The traditional cross bar type
The crossbar type has two cases, a lock stile case and a hinge stile case. A conventional round cross bar connects horizontally across the door to both of them. Pressing the crossbar toward the door retracts the latch.
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Q What are exit devices?
A Exit devices are used to secure openings while at the same time providing immediate egress in the case of emergency.
An exit device is a piece of hardware mounted on the push side of a door. It is designed to release a latching mechanism in the event of panic. Exit devices are intended to operate without prior knowledge or training when pressure is applied to horizontal bar or push pad mounted to the door.
Because of their direct effect upon life safety, exit devices are one of the most important hardware items in a building.
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Q Are your company factory or trading company?
A We are a SGS Audit factory, over 10 years manufacturing experience in architectural hardware.
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