Products / Socket Lifting System / Precast Accessories / Swivel Eye

Swivel Eye

The lifting eyes are supplied with an identification label. This label indicates :

– The manufacturer (ADC)

– The thread (example Rd24)

– The Safe Working Load (example 2500 kg)

– The batch number (example 3F100).

The removable ring fixed with 4 screws enables the lifting eye to be fully sitting on the concrete, in both case if the socket has been positioned flush with the concrete or offset in the concrete.
When the socket is positioned offset in the concrete, always use the plastic holding disc diameter ØD1. When the socket has been positioned flush with the concrete, always use the adaptation ring.
When the socket has been positioned offset in the concrete, always remove the adaptation ring.
Be careful, all other combinations are dangerous, and therefore forbidden!

Periodic Control of the Swivel Eyes

Whatever the frequency of use, each lifting eye must be controlled at least once a year by a competent person. Any physical abnormality, deformation, any sign of welding, must lead to the immediate destruction of the lifting eye.

The points to control are:
– Absence of permanent deformation
– Absence of crushing
– Absence of bends or twists
– Absence of damage due to corrosion
– Correct hinge between the head and the handle
– Correct hinge between the head and the handle
The lifting eyes cannot be repaired.

Usage and Safety Conditions of the Swivel Eyes

Before Use

To do:
– For lifting, always use sockets and lifting eyes with a round thread (Rd)
– Make sure that the thread diameter of the lifting eye and that the Safe Working Load on the label of the lifting eye are the same than for the socket
– Make sure than the thread of the lifting eye is fully engaged into the thread of the socket. If the lifting eye is not enough engaged onto the socket,
it reduces its load capacity.
– Make sure that the thread of the socket is clean.
– Make sure that the bottom surface of the lifting eye is fully sitting on the concrete:
- If the socket has been positioned flush with the
concrete, use the adaptation ring
- If the socket has been positioned offset in the
concrete with a recess holding disc diameter ØD1, remove the adaptation ring
– Make sure that the length of the slings is at least twice the distance between the sockets, in order
to have an angle of 30° between the slings. It is possible to have a bigger angle only if it has been considered in calculations. It is always better to use a lifting beam
– Make sure that the concrete strength is at least equal to that used in the calculations. The minimum concrete strength is 15 MPa
– Make sure that the lifting eye has no default, such as welding points and clean thread without crushing.

Not to do:
– Never screw a round thread lifting eye (Rd) into
a metric thread socket (M). The lifting eye would never be able to screw on a sufficient length, and the load capacity will be dangerously reduced
– You must not weld the socket nor the lifting eyes, for whatever reason.

In Use

- When precast concrete elements are transported by construction companies, they are subject to shocks and impact loads. This factor increases the load on the socket by several times the dead-weight should be taken into account in load calculations. Therefore, care should be taken in transporting the elements on site.

– When the sockets are used to lift a unit from a mould, the adhesion between the freshly cast concrete and the mould increase the forces on the sockets. This element needs also to be taken into consideration when calculating the required load.

Maintenance

– All lifting eyes must be controlled at least once a year by a competent person. The lifting eyes must not show any sign of deformity

– The lifting eyes cannot be repaired.

General

– The lifting eyes must be used only for lifting precast concrete elements

– Users of the lifting eyes must be familiar with the usage and safety instructions

– All usage and safety instructions must be respected when lifting eyes are used.

Swivel Eye Technical Information
Swivel Eye Technical Datasheet