Saturday, December 15, 2018

Sure-Foot Stair Treads for Worker Safety

Sure-Foot Stair Treads from Anderson-Bolds

Fiberglass FRP Step Covers Improve Worker Safety


Outdoor Stairway Poses High Slip-and-Fall Risk to Employees 

Worker safety is a key responsibility for any employer, but even more so in the manufacturing industry. Whether they are clocked-in, on a break or headed home, employee care is a top priority for building design and maintenance.  
When the safety management team at an aerospace company became concerned about a set of outdoor stairs used by staff, they began to research preventative solutions.  
With an estimated 130+ workers using these steps each day, the stairway began to show signs of wear. The metal, open-grated steps were rusting in areas where the paint had chipped. Exposed to the elements, the stairs would often get wet and slick in the inclement weather.   
Taking a proactive approach, the manufacturer reached out to Sure-Foot, seeking an anti-slip solution that would allow their workers to navigate the stairway securely in all types of weather.  


Flexible Fiberglass Step Covers Eliminate Hazardous Stairway Conditions 

Sure-Foot first walked through a discovery process with the manufacturer, collecting facts on the potential project. After assessing the data, including the stairway location, step dimensions, traffic type and traffic volume, the Sure-Foot team recommended the best solution.  
Based on the customer’s information, Sure-Foot suggested its Fiberglass FRP step covers with landing panels located in the middle and at the top of the stairwell. The product used was the 11.75” anti-slip step cover in a medium grit with a yellow nose and a black back.   
Our fiberglass product was the best choice for this application because metal stair covers are too rigid, and rubber isn't suited for long-term use in outdoor environments. The flexibility of these fiberglass step covers allows them to flex with the open grated steps, making them the perfect solution in this case.  


Designing Custom Anti-Slip, Fiberglass Step Covers

Sure-Foot’s non-slip fiberglass FRP step covers are created to handle the elements no matter the amount of foot traffic.  
A custom fiberglass solution was created to the exact specifications of the 27-step stairwell. The step cover design featured a yellow nose to call attention to the steps edge. The solution was delivered to the facility ready for installation using bolt grate clips for fastening.  


Non-Slip Stairway Solution Offers Quick and Easy Installation for Customer

The customer was thrilled with the ease and speed of installation, providing before and after photos to show the incredible improvement.  
The brightly colored yellow edge allows for a better level of safety as employees quickly use the steps to come and go from the facility. The grit step covers now provide better grip and footing for workers even during poor weather conditions.

Buy Sure-Foot Treads HERE!


Sure-Foot Stair Treads and Safety Tape for Slip and Fall prevention on Side walks, Walkways, Staircases, Ladders, Step Stools. 

Saturday, December 1, 2018

60 AMP Mercury Contactors from MDI

MDI 60 AMP Mercury Contactors for Industry from Anderson-Bolds

BUY MDI Mercury Contactors HERE

The mercury relays (mercury contactors) load terminals are isolated from each other by the glass in the hermetic seal. "The plunger assembly", which includes the ceramic insulator, the magnetic sleeve and related parts, floats on the mercury pool. When the coil is powered causing a magnetic field, the plunger assembly is pulled down into the mercury pool which is in turn displaced and moved up to make contact with the electrode, closing the circuit between the top and bottom load terminal, which is connected to the stainless steel can.
To make the unit function as a "Hybrid" time delay, we add a solid state circuit to the coil to delay the power to the coil.
For constant duty applications, a return spring is used in place of the buffer spring.
Contact the factory.
The MDI 60 amp contractors come in 1,2,3 and 4 pole versions and coil voltages can be 6, 12,24,48, 120 volts DC and 24, 120, 240, 277, 480 and 600 volts AC. Normally open contractors are the most common, close on energization. Normally closed are also available. Resistive loads are the more common type of loads but the "H" designated contactors are for inductive loads (with inrush currents). 

MDI 60NO-120A contactor

MDI 260-NO120A Contactor

MDI 360-NO120A Contactor


    1. Superior Performance and Reliability
      1. Long life
      2. Durable
    2. Compact Size
    3. Low, Predictable Contact Resistance
    4. Reduced RFI for Improved Interface Capability
    5. Handles a Variety of Loads
      1. Increases design flexibility
    6. Rapid On-Off Cycling Capability
      1. Mercury quickly dissipates contact heat
    7. Low Coil Power Requirements
    8. Minimal Derating Due to Higher Ambient Temperatures
    9. Quiet Action
    1. Contacts are within a hermetically sealed steel body
      1. Impervious to adverse conditions
      2. No external arcing
    2. Arcing is in a gaseous atmosphere
      1. Quenches the arc
      2. Extends relay life
    3. Only one moving part (the plunger)
      1. No buttons to pit, weld or burn out
    4. One coil for each set of contacts
      1. Assures consistent switching
      2. Minimizes pull-in variation between contacts
    5. Epoxy encapsulated
      1. Moisture resistant
      2. High dielectric strength
      3. Permanently fixes contacts to coil; eliminating possible misalignment
      4. Helps dissipate heat and noise
      5. Rugged (impact resistant)
    1. Reduction of Operational and Maintenance costs
    2. Increases Utilization and Productivity of Equipment
      1. By reducing down-time
    3. Installation and service is a routine operation
      1. Simple to install
      2. No sophisticated equipment is required
      3. Easy to trouble-shoot

Coil Data
417 Ω
144 mA
17.4 VA
8.7 Watts
  • Operate Time: 50 milliseconds
  • Release Time: 80 milliseconds
  • Contacts:
    • 48 AMP @ 600 VAC Resistive
    • 60 AMP @ 480 VAC Resistive
      • or
    • 60 AMP @ 480 VAC General Purpose
  • Contact Resistance: .002 ohm
    • After Cycling Under Load
  • Coil: 120V 50/60 Hz
  • Coil Terminals: #6 Binding Head Screws
  • Load Terminals: 2-8 AWG Compression Type
  • Dielectric Withstand: 2500 VAC RMS
  • Longevity: Millions of Cycles
  • Temperature Range: -35°C to 85°C
  • 60NO Only
  • AC Resistive
    • 240 VAC @ 60 AMPS
    • 480 VAC @ 60 AMPS
    • 600 VAC @ 48 AMPS
  • Tungsten Lamp
    • 120 VAC @ 60 AMPS
  • Motor Loads
    • Single Phase
      • Not Recommended


Mercury Displacement Industries Mercury Contactors and Relays in 30, 35, 60 and 100 amps