Some problems of an as-built survey and setting out accuracy

Abstract

Nowadays, the accuracy of setting out is stated by the articles of ISO 4463-1, but unfortunately it is not directly associated with permitted deviations from construction works as their accuracy should be assured and assessed by means of construction surveys. An earlier GOST 26433.0-85 states that the error of setting out must not exceed 80% and the error of an as-built survey up to 40% of corresponding permitted deviations from the construction element. Combining these limits enables deriving permitted deviations for the as-built survey and setting out.