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QCM Dog bone Lifting Pin Anchors Foot Anchor T-shot Anchor
Dog Bone Lifting Pin Anchors, Foot Anchors, and T-Shot Anchors are anchors used for lifting precast concrete units, which are typically forged from high-strength steel and have spherical ends for safe and effective use in lifting and transporting precast concrete units.
Common product parameters include
- Brand and origin: QCM, origin China.
- Supply capacity: annual supply capacity of 60,000,000 pieces.
- Delivery time: 30 days.
- Material: St 52-3 or stainless steel 1.4401.
- Size range: Suitable for different load requirements from 1.3 tons to 10 tons with corresponding lifting links.
- Packing: Small size will be bagged and then boxed, large size will be boxed directly.
- Testing and Certification: The production process follows ISO9001 standards for dimensional inspection, tensile testing during production, and tensile testing before shipment.
Role:
Dog Bone Lifting Pin Anchors are used to provide safe and reliable lifting points in precast concrete components, allowing for accurate handling and positioning using a crane or similar equipment.
Features and Benefits:
- Economical, safe and effective.
- Available in a variety of sizes for different load requirements.
- Use of rubber notch formers ensures concrete is poured in the correct shape.
- Clearly labeled loads on anchors to avoid mismatches or confusion.
- Can be tensile tested to ensure safe use.
- Conforms to international standards and certifications.
Installation and use during construction:
- Ensure anchors are properly embedded in the concrete, using rubber notch formers to aid in positioning.
- Select the proper anchorage and lifting link for the load requirements.
- Avoid making incorrect connections under load or using mismatched lifting links.
- Perform periodic tensile tests to ensure the reliability of the anchorage.
Eye Shackle Edge Lifting Safety And Eye Shackle Orientation
Shear Cones for Lifters
The Shear Cone is the concrete shape left when the insert fails by pulling out of the concrete. The strength of a lift insert is determined by the ‘Shear Cone Surface Area’ (SCSA). Lifter manufacturers consider a 45 degree angle from the surface of the concrete, to the bottom of the lifting insert. Actual failures show the angle is closer to 35 degrees (see photo below).
Tension Lifts
Tension Lift is when the lifter is pulled perpendicular to the concrete, as shown below. To have the full strength for a Tension lift, the minimum edge distance of the concrete must be at least 1.5 times the depth of the insert. This edge can be the distance to a hole, blockout, knockout or the edge of the product. Below is a drawing of a tension shear cone:
Get the schematic diagram of all Tension Load
Selecting the Right Dog Bone Lifting Pin Anchors:
- Select the appropriate anchors based on the weight and size of the precast concrete member.
- Consider the strength of the concrete and the pouring conditions.
- Select anchors with an adequate safety factor based on frequency of use and complexity of lifting operations.
- Refer to the technical data and certifications provided by the manufacturer to ensure compliance with engineering requirements and safety standards.