What options do you offer for tethering projects?
The most efficient way of using Spirafix ground anchors for tethering applications is to have the anchor in line with the load. The issue here is that the spiral anchor must be locked off to prevent it from counter rotating back out of the ground under extreme loads. Until recently the way around this was to use an offset tethering bracket that created an angle between the load and the axis of the anchor, usually 30°. The bracket acted as a torque arm that stopped the anchor from unscrewing. This still works and we have a variety of brackets that can either be bolted onto the top of the anchor or the anchor is driven through a slot in the bracket. The downside to this method is that under extreme loads with a sideways pull the anchor can bend. We are now producing locking bars that can be driven in at 90° to the angle of the load to allow the anchor to be in line with it. The locking bar prevents any tendency of the anchor to unscrew itself. We also produce multi anchor hubs that can be used to give much higher load ratings. These are through slot hubs that take either two or three anchors and are quick and easy to use.
Can your anchors be used for 4x4 winch applications?
Yes, you can use our SA454 two or three spiral anchor hub with either SF50-8-0460C or SF50-8-0610C anchors (SF50-8-0490AC and SF50-8-0630AC anchors will also do). You will need to use an M16 shackle fitted to these brackets to be able to use it. You will need a short handled sledge hammer to install the anchors and and a 28mm spanner to remove them.
Do I need to prepare the ground before I install Spirafix Ground Anchors?
No, Spirafix are designed to cope with hard ground conditions and drive down into position on their own helix. They are installed via impact, so they are a hammer in anchor. They are not twisted into position, so normally a lump hammer (for smaller anchors), sledge hammer (medium sized anchors) or power tool can be used. Its important that you know the ground you are using is free from buried services and that you avoid danger. If in doubt do not install until a professional has advised you.