Miller 494 Grip Friction Bolt Anchorage Connector Instruction Manual
- June 3, 2024
- Miller
Table of Contents
Miller Grip ™ Friction Bolt
Anchorage Connector
Model #494
494 Grip Friction Bolt Anchorage Connector
Portable/Reusable Anchorage Connector
DESIGNED FOR USE WITH A 39mm FRICTION ROCK BOLT
IMPORTANT!!
All persons using this equipment must read, understand and follow all
instructions. Failure to do so may result in serious injury or death. Users
should be familiar with pertinent regulations governing this equipment. All
individuals who use this product must be properly trained in its use. If a
fall occurs, the Miller Grip must be disposed
of according to the manufacturer’s instructions.
The Miller Grip Friction Bolt Anchorage Connector Model #494 is designed for:
- single-user fall protection anchorage applications
- Miller approved horizontal and vertical lifeline anchorage applications
Specifications
Model No.:
Compatible Friction Bolt Size:
Maximum Capacity:
Minimum Tensile Strength:
Compliance:| 494
39mm (1-1/2 in)
400 lbs (181.4kg)
10,000 lbs (44kN)
OSHA & ANSI Z359.1
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For use by ONE PERSON ONLY**
May be used for two persons in Miller approved lifeline anchorage applications only Color Coded with Bright Green Thimble to Indicate “FALL PROTECTION USE ONLY”
Materials**
Main Cable:
Swage, Stop Sleeves, Spoons:
Trigger:
Cleaning Bushing:
Zinc Spring:
Zinc Swage:
Return Wire:
Thimble:| 7×19 Galvanized Cable
304 Stainless Steel
6061 T-6 Aluminum
Zinc Plated Steel
Zinc Plated Spring Steel
Zinc Plated Copper
1×19 Galvanized Cable
Polyurethane
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WARNING!!
- All warnings and instructions shall be provided to authorized persons/users.
- Proper precautions should always be taken to remove any obstructions, debris, material, or other recognized hazards from the work area that could cause injuries or interfere with the operation of the system.
- Always inspect unit according to manufacturer’s instructions prior to each use. Do not use this device if any components are damaged, cracked, broken, or deformed. Do not use the device if it does not operate smoothly and properly.
- All equipment should be inspected by a qualified person on a regular basis.
- To minimize the potential for accidental disengagement, a competent person must ensure system compatibility.
- Fall arrest systems used with the anchorage connector must be rigged in accordance to regulatory requirements. (All instructions and warnings provided with the components f the personal fall arrest system must be read, understood, and followed.)
- Ensure that the anchor point, in combination with the connecting device, is at a height that limits free fall distance to 6 feet (1.8m) or less.
WARNING!!
- Use the proper method of coupling to anchorage.
- Do not use incompatible connectors with this device. Use only Miller approved connectors/connecting devices, such as autolocking snap hooks and carabiners. Always ensure that connectors are fully closed and locked when in use. (Refer to separate instructions supplied with the connecting device.)
- Always work directly under the anchor point to avoid a swing-fall injury.
- Always check for obstructions below the work area to make sure potential fall path is clear and allow adequate fall clearance below the work surface.
- The authorized person/user shall have a rescue plan and the means at hand to implement it when using this equipment.
- Remove unit from service if subjected to fall arrest forces. This product is not designed to be repaired or altered in any way.
- Never use fall protection equipment for purposes other than those for which it was designed.
- Equipment must not be exposed to environmental hazards and chemicals which may produce a harmful effect.
- Do not allow equipment to come in contact with anything that will damage it, including, but not limited to, sharp, abrasive, rough or high-temperature surfaces, welding, heat sources, electrical hazards, or moving machinery.
- Do not expose the equipment to any hazard which it is not designed to withstand. Consult the manufacturer in cases of doubt.
- Pregnant women and minors must not use this product.
Installation and Use of Miller Grip Model 494
Miller Grip Model #494 is designed to be used for fall protection applications
only. It is not to be used in any other anchoring situation. Only trained and
competent personnel should install and use this equipment. The device may be
installed in horizontal, vertical or overhead/ceiling surfaces. It may also be
used in Miller approved horizontal and vertical lifeline systems.
The structure that this product is anchored to must be capable of supporting
5,000 lbs. (22.2 kN) per user attached; or be designed, installed and used,
under the supervision of a qualified person, as part of a complete personal
fall arrest system which maintains a safety factor of at least two. Anchorage
requirements based on ANSI are as follows:
- For fall arrest systems, anchorages must withstand a static load of 5,000 lbs. (22.2kN) for non-certified anchorages or two times the maxi mum arresting force for certified anchorages.
- When more than one personal fall arrest system is attached to an anchorage, the above anchorage strengths must be multiplied by the number of personal fall arrest systems attached to the anchorage.
The Miller Grip Anchorage Connector is designed for use with Miller approved
components. Substitution or replacement with non-approved component
combinations or subsystems or both may affect or interfere with the safe
function of each other and endanger the compatibility within the system. This
incompatibility may affect the reliability and safety of the total system.
A safe anchor point is established when the Miller Grip Friction Bolt
Anchorage Connector (#494) is inserted into a friction bolt with an outside
diameter of 39mm (1-1/2 in). Follow manufacturer’s instructions for proper
installation of friction bolt.
IMPORTANT!
Remove all dirt and debris from inside the friction bolt before placing this
unit. Use the friction bolt anchor cleaning bushing to clean the inner walls
and blow the hole out with compressed air prior to inserting the friction
bolt.
When placing a Miller Grip Friction Bolt Anchor, place your thumb inside the
anchor loop and your first two fingers around the trigger. Retract the trigger
until the spring bottoms out. With your other hand, pinch the two spoons
between your thumb and index finger. IMPORTANT: Hold the trigger fully
retracted while inserting the unit into the friction bolt. Both spoons must be
evenly placed side by side at the bottom of the hole. DO NOT force the unit
into the hole. Insert the unit slowly and gently.
Proper Placement Guidelines
- The friction bolt anchor must be inserted 4” (101.6mm) to 8” (203.2mm).
- Make sure the unit is in a straight section of the friction bolt.
- Place the spoons so they rest on the inner walls of the friction bolt and not on the split section.
- Give a slight tug on the anchor loop to set in place [5-10 lbs (2.3-4.5kg)].
- You must be able to see and have access to the cleaning bushing from outside the friction bolt. Do Not place in a bent section of the friction bolt or to where the cleaning bushing is not visible.
- The friction bolt must be embedded into the substrate. Do Not use the anchor in a friction bolt that is sticking out of the substrate or is in a cavity without the substrate supporting the friction bolt. Friction bolt must be properly installed.
Connecting devices used in conjunction with the Miller Grip Anchorage
Connector must be attached to the anchor loop only.
Temporary Horizontal Lifeline Application
This illustration demonstrates a temporary Horizontal Lifeline Kit being used
with two Miller Grip Friction Bolt Anchorage Connectors properly installed at
each end.
When using the Miller Grip Friction Bolt Anchor within a Miller approved
Temporary Horizontal Lifeline System, the maximum number of users is two (2)
simultaneously. System capacities are based on the maximum user’s weight
(including tools, clothing, etc.) of 400 lbs. (181.4 kg). Miller Fall
Protection requires the use of a Miller full-body harness and shock-absorbing
lanyard or self-retracting lifeline/fall limiter that limits fall arrest
forces with the horizontal lifeline system. All instructions and warnings
provided with the body wear, connecting device and horizontal lifeline system,
must be read and understood before using the equipment.
To meet the requirements set forth in OSHA 1926.502, the Temporary Horizontal
Lifeline must be “installed and used as follows: (i) as part of a complete
personal fall arrest system which maintains a minimum safety factor of two;
and (ii) under the supervision of a qualified person.” The horizontal lifeline
system must include an inline energy absorber that is designed to keep the
forces on each anchorage connector to a maximum of 3,789.5 lbf. (16.9kN). This
force requires that the anchorage connectors and the substrate to which they
are attached must be capable of supporting 7,579 lbf. (33.7kN) in the
direction of pull. The Miller Grip Friction Bolt Anchor has been tested and
rated for 10,000 lbs. (44kN) to meet OSHA’s requirement for the system.
Removal:
If a Miller Grip anchor becomes stuck, insert a punch, screwdriver or pointed object into the friction rock bolt until the tip rests on the striker plate. (The striker plate is the flat end of the bushing that is exposed when the unit is placed in the friction bolt and will be easily visible.) Give a LIGHT, blunt tap with a hammer or heavy object.
Inspection
- Make sure unit is straight and operates smoothly.
- Make sure the label is affixed to unit.
- Make sure trigger stop is not bent or damaged.
- Make sure cables are not kinked, frayed or damaged.
- Make sure metal components are not damaged.
- Make sure metal spoons and conical end fitting operate smoothly and no metal burrs have occurred.
Storage and Cleaning
- Blow off unit after each use with compressed air
- Store in clean dry environment.
- Store in secure locked area.
- Store and put away at the end of each work day, unless anchor is being used as part of a temporary horizontal lifeline system. The mining industry can be a highly abusive environment. It is important that you take proper care of the anchorage connector and store it in the friction bolt anchor container when not in use.
- Do not pile any objects on top of unit during storage.
- Keep unit free of grease, oils and dirt.
- Never lend your unit to other workers.
Disposal
- Dispose of unit after any fall has occurred.
- Dispose of unit if cable becomes kinked or bent.
- Dispose of unit if trigger stop is bent or damaged.
- Dispose of unit if trigger action is rough or sticky.
- Dispose of unit if return wire becomes bent or frayed.
- Proper disposal requires the unit’s spoons be cut off the return wires and thrown away.
LABELING
The following label must remain affixed to this product.
INSPECTION AND MAINTENANCE LOG
DATE OF MANUFACTURE: ____
MODEL NO.:____
DATE PURCHASED:___
Date| Inspection Items Noted| Corrective Action| Name of
Inspector| Signature
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Honeywell Safety Products
PH: 1-800-873-5242 FX:
1-800-892-4078
www.millerfallprotection.com
P.O. Box 271, 1345 15th Street, Franklin, PA 16323 USA
I307 Rev A—Page 4 of 4
Documents / Resources
|
Miller 494 Grip Friction Bolt Anchorage
Connector
[pdf] Instruction Manual
494, Grip Friction Bolt Anchorage Connector, 494 Grip Friction Bolt Anchorage
Connector
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