| 摘要 |
Reinforcing bars are supported by a spacer 13. The spacer has no right way up so it may be inverted making it easier to use. The spacer is strengthened due to a rounded central body and optimal bracing. The spacer is cross shaped or cruciform having radiating arms 35, 36, 37 and 38 comprising parallel spaced walls 39, 40, 41, 42, 43, 44, 45 and 46. The walls are braced by diagonal braces 47, 48, 49, 50, 51, 52, 53 and 54. All the braces and the body 20 have strengthening ribs. The tapered walls 30, 31, 32 and 33 are tapered to provide a lead-in guide for the reinforcing bars 18 to automatically locate them in position. The walls of the arms 39 through 46 have lead-ins formed by tapered cut out sections 55 through 62 and each pair of these such as 55 and 56 automatically align the outer one to the bars 19 in operative position while the bar 19 will be automatically positioned atop the centre point 34 and again be automatically aligned in that position as well. The spacer at each of the arms 35, 36, 37 and 38 includes an outer flange being an abutment flange 63. The spacer is longer in one direction. C/Jl r~ |
