Various Types Of Continuous Single Member Ties are as follows:

1. Flat Tie

Flat tie is a thin flat steel plate that contains a hole at each end. These holes are used to lock the flat tie in forms using wedge and pin.

These are preferred for prefabricated modular form panels and for light-duty purposes.

These are for a one-time purpose only since they cannot be removed from hardened concrete.

They are removed by braking and to facilitate braking, a notch is provided at a predetermined distance from its ends.

To prevent turning of the tie while braking, holes may be provided in its middle portion.

2. Loop Tie

Loop tie is a single metal bar which ends are looped to provide space for locking systems such as wedge and pin.

These are also preferred for prefabricated modular form panels and for light-duty purposes.

Loop tie cannot be removable from hardened concrete hence, it contains weaker cross-section.

To prevent turning against braking, some part of the middle portion is crimped.

3. Fiberglass Tie

Fiberglass ties are newly developed tie system which is made of glass fibers and resin materials.

These are available in longer lengths and can be cut into required sizes easily.

These ties are fixed to the form panels using gripper and tie wedge arrangement.

After the hardening of concrete, the ties can be cut at the surface level of hardened concrete. So, the hole will disappear.

They are available in so many colors and capable of carrying higher loads than the flat, loop and snap ties.

4. Snap Tie

Snap tie is a single rod that ends contain an enlarged button or loop to facilitate the use of suitable tie holders.

Plastic cones or metal washers or pins are attached to these ties to use them as form spreaders and also to prevent water leakage from concrete.

Snap ties cannot be removed completely from the hardened concrete hence, they contain weaker cross-sections that are easy to snap.

The breaking of the tie should be done after the complete hardening of concrete otherwise they do not break and turn inside the wall by spanning the concrete.

To prevent turning, while making these ties a portion of the tie at a required distance is crimped or weakened to ease snapping of tie.

5. Taper Tie

Taper tie contains a tapered rod which is threaded at both ends. After placing in forms, these ends are locked by using wing nuts and washer system.

They are available in standard lengths of 34 into 60 in. So, required wall thickness can be obtained using different lengths of taper ties.

The diameter of the taper tie is gradually reduced from larger threaded end to small threaded end.

Tapered ties can be removed completely after the hardening of concrete and can be reusable.

For easy removal, a taper tie must be coasted with grease before installation.

6. Threaded Tie

Threaded Tie contains a metal rod that is completely threaded from one end to the other end.

It is fixed to the forms using nuts and washer on each end.

It can be removed from hardened concrete if the plastic sleeve is provided around it.

After hardening, the sleeve is bonded with concrete and threaded tie can be removed and reused.

It can be used for higher loads, but in such cases, two nuts on each end are preferred.