CRL EBA334 M8 3-7/8" Long HSL-3 Expansion Anchor Instruction Manual

1. Product Overview

The CRL HSL-3 expansion anchor, model EBA334, is a heavy-duty, torque-controlled expansion bolt designed for high performance in both static and dynamic load applications. This anchor is compliant with 2003 and 2006 IBC standards and delivers optimal performance in cracked concrete. This specific model has a length of 3-7/8 inches (98 mm).

Figure 1: The CRL HSL-3 expansion anchor, showing its threaded bolt, expansion cone, and sleeve.

2. Safety Information

Always observe general safety precautions when working with power tools and fasteners. Failure to follow these instructions may result in injury or property damage.

Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and hearing protection.
Ensure the base material is suitable for expansion anchors and can support the intended load.
Verify that there are no hidden electrical wires, pipes, or other utilities in the drilling area.
Do not exceed the specified torque values during installation. Over-tightening can damage the anchor or base material.
Keep children and bystanders away from the work area.
Store anchors in a dry environment to prevent corrosion.

3. Components

The CRL HSL-3 expansion anchor consists of the following primary components:

Threaded Bolt: The main shaft of the anchor, which is threaded at one end for a nut and washer.
Expansion Cone: A tapered component at the end of the bolt that expands the sleeve when tightened.
Sleeve: A cylindrical metal casing that expands against the drilled hole walls to create the anchorage.
Nut and Washer: Used to apply torque and secure the fixture.

Detailed view of CRL HSL-3 Expansion Anchor components

Figure 2: A detailed view of the CRL HSL-3 expansion anchor, highlighting its construction.

4. Installation Instructions

Follow these steps for proper installation of the CRL HSL-3 expansion anchor:

Drill the Hole: Using a hammer drill, drill a hole of the specified diameter and depth into the concrete base material. Ensure the hole is perpendicular to the surface. For the M8 anchor, consult the manufacturer's specifications for the exact drill bit diameter. The effective anchorage depth is 60 mm.
Clean the Hole: Thoroughly clean the drilled hole using a wire brush and a blow-out pump or compressed air to remove all dust and debris. A clean hole is critical for proper anchor performance.
Insert the Anchor: Insert the CRL HSL-3 expansion anchor into the cleaned hole. Ensure the anchor is fully seated, with the washer and nut flush against the surface of the base material or fixture.
Tighten the Anchor: Using a torque wrench, tighten the nut to the manufacturer's recommended torque value. As the nut is tightened, the expansion cone is pulled into the sleeve, causing the sleeve to expand and grip the walls of the drilled hole. Do not over-tighten.
Verify Installation: After tightening, ensure the anchor feels secure and the fixture (if applicable) is firmly attached.

Note: The minimum thickness of the base material required is 120 mm. The maximum thickness of the material to be fastened is 20 mm.

5. Operation

Once properly installed, the CRL HSL-3 expansion anchor provides a secure and reliable fastening point. The anchor functions by creating an outward pressure against the walls of the drilled hole in the concrete, resisting pull-out forces. It is designed for applications requiring high performance under static and dynamic loads.

6. Maintenance

Expansion anchors generally require minimal maintenance once installed correctly. However, periodic inspection is recommended, especially in critical applications or environments subject to vibration or significant temperature fluctuations.

Visual Inspection: Check for any signs of corrosion, loosening, or damage to the anchor or the surrounding concrete.
Retightening: If an anchor appears loose, carefully retighten the nut to the specified torque value. Do not over-tighten.
Environmental Factors: In corrosive environments, consider protective coatings or replacement if significant degradation is observed.

7. Troubleshooting

Problem	Possible Cause	Solution
Anchor does not hold securely.	Incorrect drill hole diameter or depth. Hole not properly cleaned. Insufficient tightening torque. Base material is too weak or cracked beyond anchor capacity.	Verify drill bit size and hole depth. Ensure hole is free of dust and debris. Retighten to specified torque. Relocate anchor to a sound section of concrete or use a different type of anchor suitable for the base material.
Anchor spins during tightening.	Drill hole is too large. Base material is soft or damaged.	Use a smaller drill bit or relocate the anchor. Relocate anchor to a sound section of concrete.

8. Specifications

Model Number	EBA334
Anchor Type	HSL-3 Expansion Anchor
Nominal Diameter	M8
Anchor Length	3-7/8" (98 mm)
Effective Anchorage Depth	60 mm
Maximum Thickness Fastened	20 mm
Minimum Thickness of Base Material	120 mm
Material	Carbon Steel
Approvals/Listings	ETAG, Shock BZS, Fire IBMB, Fire exiting. VdS (2003 and 2006 IBC compliant)
Product Dimensions	3 x 2.2 x 0.6 inches
Item Weight	0.256 ounces

Note: The indicated load value applies to non-cracked concrete C20/25, with no edge distance and spacing influence. Always refer to local building codes and engineering specifications for specific application requirements.

9. Warranty and Support

For specific warranty information and technical support regarding the CRL EBA334 HSL-3 Expansion Anchor, please contact the manufacturer, CRL, or your authorized distributor. Warranty terms and conditions may vary based on region and purchase location.

Manufacturer: Hilti (as per product specifications, though brand is CRL)

CRL EBA334