In general, if a chair was burned and passed the required test, all other pieces in the collection, whether a sofa or a bench, would pass the test if the exact same components were burned in their entirety. This means the fabric, foam and frame of the furniture is constructed in an identical fashion in the collection. For example, if a wood frame is used for the chair, even if just the legs are changing to metal, a new test is usually required. Only the colour or texture of the fabric can be modified. Trellis can provide sample documents to your inspector for their approval.