Consider the first option.
A tightening screw for the formwork systems (called builders, "stud") is a metal rod of low-alloy steel produced by the method of precision casting. It is threaded throughout its length and can be with zinc coating for corrosion protection. It is this type coupling screw a length of 3 meters and is represented in our catalog.
Since the tensioning screw is not able to hold the formwork, it is used complete with coupling nuts and washers. If necessary, re-use clamping screws to protect them from contact with the solution, use a special PVC tube and clamps the cones, which remain in the monolith at raspalubki.
Install the tie bolts for formwork recommend indented from the edges of the shields 10 cm For reliable tying two parallel standard plates require a minimum of 4 sets of ties, but if you count in their area consumption per 1 m2 is very small. Set to be in increments of two feet in two rows, and the bottom decks are usually bursting with struts.
A variant of the attachment of the formwork tie bolt and nuts cost more to use spring clips, but it has important advantages. This kit allows you to adjust the width of the concrete forms with a precision of millimeters and allows you to build a wall formwork with thicker walls to withstand a high load.