Patent ID: 6443238
Filing Date: 2002-09-03
Classification: B23B,B25F,E04G,Y10T

Abstract:
A method of securing two or more wythes in a building structure utilizing a helical tie member having longitudinal helical flutes terminating at a cutting end at one end and terminating at a remote end opposite the cutting end comprising the steps of:drilling a first wythe pilot hole to a diameter less than a diameter of the flutes on the tie to be inserted; drilling a pilot hole in a second wythe to a predetermined depth; proportioning said tie to a diametrical range between 4 and 12 millimeters; forming said tie out of austenitic steel of grades 304 or 316 stainless steel and limiting the longitudinal dimension of such ties to the range of 6 to 12 inches; forming a chiseled end on at least one end of said tie; inserting the remote end of the tie into a reciprocating power driven tool which has a rod which engages and impactingly drives the tie with a hammer like impact in the absence of any driven torque and permits the tie to rotate while confined around its longitudinal axis as a helical bed is developed in the first wythe due to the torque free impact penetration by the tie; passing the flutes into the second wythe and continuing to impactingly drive the tie to a base of the pilot hole; removing the driving tool from the remote end of the tie; and thereafter finishing the remote end of the tie in accordance with mandates of the site.