Replacement Strap DIY
First, determine what width of strap you need and if it is single or double wrapped around the frame. Remove all the old strap and plugs and clean your furniture thoroughly.
Wrap the fabric tape measure around the hole, once for single wrap, twice for a double wrap and pull across the frame to the corresponding hole and wrap around again once or twice depending on what you need.
When installing strap, you will need a stock pot of boiling water, tongs and gloves. The cut strap will need to sit in boiling water for a few minutes before you can stretch it over the frame with the plugs.