| 摘要 |
A hammer-in fixing (10) for securing composite insulation panels (30) to a rafter (32) or a joist comprises a helical shank (12) having a longitudinal axis and a head (20) defining at least one planar surface (22). The planar surface (22) is fixed adjacent an end of the shank (12) such that the planar surface (22) lies in a plane perpendicular to the longitudinal axis and the cross sectional area of the planar surface (22) is at least 20 times that of the helical shank (12). |
