Abstract: In the method of upholstering a couch or a chair having a hollow frame with a front rail, a series of rows of coiled springs mounted upon and projected above the frame and parallel to the rail, and an edge wire extending tangent and connected to the top coils of the row of springs adjacent the rail, including the step of tying the springs of the other rows together, and to the row of springs adjacent the rail and to the frame; the improvement which comprises the preliminary step before tying the springs of selectively mounting, spacing and securing a plurality of upright edge wire clamps to and along the rail outwardly thereof. Each clamp includes an upright support having an adjustable edge wire retaining block thereon with a depending edge wire retainer. Further steps include selectively adjusting the edge wire retaining blocks on each clamp to a predetermined height with the corresponding edge wire retaininers longitudinally aligned and retainingly engaging the edge wire.