Quick Answer
Use a double ridge line for a tarp shelter when wind direction is consistently blowing from a single direction, and you want to create a tight, secure, and stable space with minimal tarp sag.
Conditions for Double Ridge Line Setup
When setting up a tarp shelter, a double ridge line can be beneficial for securing the fabric and reducing sag, especially in windy conditions. A double ridge line involves running two lines from the anchor points to the center of the tarp, creating a ridgeline that allows the tarp to be pulled tight and evenly distributed. This setup is ideal when you anticipate strong and consistent winds from a single direction.
Tension Adjustment
To create a stable double ridge line setup, it’s essential to adjust the tension on both lines. Start by tightening the lines equally and then make adjustments as needed to achieve even tarp tension. A good rule of thumb is to aim for a tarp sag of 12-18 inches (30-45 cm) between the ridgeline and the edge of the tarp. This will provide a balance between tarp stability and comfort inside the shelter.
Double Ridge Line Anchors
When setting up a double ridge line, use sturdy anchors, such as trees, rocks, or even guy lines, to secure the lines at a height of about 6-8 feet (1.8-2.4 meters) above the ground. This will help distribute the weight of the tarp and reduce the risk of line sag or failure. Make sure to tie the lines off securely and check them regularly to prevent any damage or damage from wind or weather conditions.
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