Bar schedule dimensions: deductions for permitted deviations

Synopsis

Standard deductions are applied to the dimensions of bent bars between concrete faces to improve the confidence of minimum covers being achieved and to improve fit. Traditionally, the deductions in BS 8110 have been applied. The introduction of new sets of permitted deviations in covers and element thicknesses in the Execution Standard, BS EN 13670, and the supersession of BS 8110 has led to the need to reconsider these deductions and ultimately to propose a new set, consistent with current Execution Standards.