Solutions to Meet Every Budget

NAI offers complete crane systems and, for the more budget-conscious, crane components. Our installation services range from full turnkey solutions to working supervision and start-up services.  NAI responds to your needs with a range of options; you benefit from NAI’s decades of crane expertise while remaining within your project’s budget.

Durability

NAI has standardized on Class D crane systems, which are designed to perform twice the amount of work over their lifetimes compared with moderate-duty Class C cranes with the same lifting capacity.   For example, a Class D system can make 2x as many lifts in an hour and lift its full-rated load 30% more often than a similar-capacity Class C crane.  Physically bigger and stronger than Class C cranes, Class D crane systems generally last 30 to 40 years.  What does this mean for you?  Less maintenance and more uptime.

CMAA Membership

As a member of CMAA, NAI:

• Meets high standards in engineering design, production, and related operations.
• Maintains a position of technological advancement.

Other Industry Standards

In addition to CMAA standards, NAI crane systems are designed in compliance with:

• AISC
• ANSI
• OSHA

NAI also follows the following specifications in designing its crane components:

NAI is a proud member of the Material Handling Industry (MHI).

Low Maintenance Design Reduces Ongoing Costs of Operation

NAI’s crane systems are designed to save you money by lifting more reliably and lasting longer.  Here are just a few examples of NAI’s typical design features that you can rely on:

•  Sealed wheel ball bearings which never need lubricating and keep out dirt and grit, a major cause of bearing failure.  All bearings are designed as Class D, with a minimum life expectancy of 10,000 hours of motor on-time (double the on-time expectancy of Class C crane bearings, which are rated for 5,000 hours).
• Gearboxes with high-grade synthetic oil that needs changing far less often than conventional oil.
• Automatically-resetting thermal overloads, instead of fuses which must be replaced. These overloads are placed inside all 3 motor windings to assure the most complete motor protection.
• Our pendant stations are ergonomically designed for easy one-hand use and are constructed of durable thermoplastic resin.  Our pendant cables are designed with 2 steel cords built into the jacket in order to withstand the harsh conditions and treatment that the pendants often endure. The wires in the cable lay straight and are never spiral wrapped, eliminating the greatest cause of breakage.
• Our standard braking systems utilize variable speed drives for deceleration and/or electromechanical parking breaks which will never wear out with normal use.
• The bridge electrification cable and pendant cable on NAI cranes are designed with 10–20% spare conductors. If a wire breaks, you don't have to replace the cable, just connect the spare conductor.
• Our crane systems are engineered for rapid and easy maintenance and repairs.  Wheels can be removed from above, without having to lift the crane off the runway rails. Electrical panels are designed with extra room, and the wiring diagram is provided as part of an O&M Manual, and a copy is mounted inside the panel.

Hoists

Hoists on our standard-design crane systems are rated by HMI (Hoist Manufacturers Institute) as H-4 for heavy-duty use. H-3 (average duty) hoists or H-2 (infrequent use) hoists are more common in the market.

Motors

Our Class D end trucks and trolleys are driven by continuous-duty motors, compared with 30-minute motors required on Class C cranes. All motors on NAI crane systems have Class F insulation, which allow the motors to run hot without causing damage.

• AFBMA

Anti-Friction Bearing Manufacturers Association

• AGMA

American Gear Manufacturers Association

• ASCE

American Society of Civil Engineers

• AWS

American Welding Society

• HMI

Hoist Manufacturers Institute

• MMA

Monorail Manufacturers Association

• NEC

National Electric Code

• NEMA

National Electric Manufacturers Association

• UL

Underwriters Laboratories

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