surface roughness given in
the section on Capping Plates of Practice C 617. Provision
shall be made for fixing both end plates firmly to the mold. The
inside surface of each end plate shall be provided with at least
three lugs or studs approximately 1 in. [25 mm] long, firmly
fastened to the plate for embedment in the concrete. One base
plate shall be drilled from the inside at an angle to permit the
lead wire from the strain gage to exit the specimen through the
edge of the plate. Provision shall be made for accurately
positioning the strain gage. All necessary holes shall be as
small as possible to minimize disturbance to subsequent strain
measurements and shall be sealed to prevent leakage