Editing Rod (unit) (section)

===Volume===
A traditional unit of volume for stone and other masonry. A perch of masonry is the volume of a stone wall one perch ({{convert|16+1/2|ft|m|2|disp=or}}) long, {{convert|18|in|cm|1}} high, and {{convert|12|in|cm|1}} thick. This is equivalent to exactly {{convert|24+3/4|cuft|cuyd m3 L|abbr=off}}.

There are two different measurements for a perch depending on the type of masonry that is being built:

#A dressed stone work is measured by the {{frac|24|3|4}}-cubic foot perch ({{convert|16+1/2|ft|m|2|disp=or}}) long, {{convert|18|in|cm|1}} high, and {{convert|12|in|cm|1}} thick. This is equivalent to exactly {{convert|24+3/4|cuft|cuyd m3|6|abbr=off}}.
#a brick work or rubble wall made of broken stone of irregular size, shape and texture, made of undressed stone, is measured by the ({{convert|16+1/2|ft|m|2|disp=or}}) long, {{convert|12|in|cm|1}} high, and {{convert|12|in|cm|1}} thick. This is equivalent to exactly {{convert|16+1/2|cuft|cuyd m3|6|abbr=off}}.<ref>See {{cite book |first1=William M. |last1=McClurg |first2=Morrell M. |last2=Shoemaker |name-list-style=amp |date=1970 |title=The Building Estimator's Reference Handbook |edition=17th |location=Chicago |publisher=Frank R. Walker Company |page=1644}}</ref>