Installing Replacement Patio Slings on your Patio Furniture
Remove the sling rail end caps
Using a flat head screw driver, carefully remove the plastic end caps from both ends of the sling rails, making sure not to break/damage them.
Remove the old sling
Depending on the age of the slings some can be slightly difficult to remove. The easiest way to remove them is to cut the old sling down the middle using a utility knife or scissors, then sliding the old slings out.
Removing hardware (from one rail) and spreader bar(s)
Next you will need to remove the bolts from one of the sling rails (keeping one attached) and remove the spreader bars(s).
Re-installing new replacement sling
First you need to feed the new splines through the slings. Next feed your new replacement sling into the rails (make sure everything is even) and bolt the loose rail back onto the chair.
Installing spreader bar
This can be difficult depending on the manufacturer of your patio sling set but with some help can be done rather easy. Some furniture brands will allow enough resistance to manually spread the sling rails apart by hand (using a second person) and bending the spreader bar slightly to fit into place and others may require you to use a spreader tool that can be purchased for around $10.
Cut any excess spline and re-install end caps
Cut any excess sling spline material with scissors or wire cutters and re-install the end caps.