The Dayton Superior Bar Lock Coupler System provides a simple, quick,
cost effective method for splicing deformed rebar in tension and/or
compression applications. Bar Lock couplers are effective when used as a
"positional" coupler when the rebar is fixed in place or when the rebar
is free to rotate. Bar Lock couplers utilize lock-shear bolts and
serrated grip rails to mechanically splice the rebar. The serrated grip
rails are embedded in the rebar as the lock-shear bolts are tightened.
The heads of the lock-shear bolts are designed to shear off at a
prescribed torque to ensure proper installation
Product Data Sheet for Dayton Superior D250 S/CA
INSTALLATION
1. Insert the end of the first rebar halfway into the coupler until it contacts the center stop pin.
2. Holding the first rebar in place, tighten all the bolts on that half until they are hand tight against the rebar.
3. Insert the end of the second rebar halfway into the coupler until it contacts the center stop pin.
4. Holding the second rebar in place, tighten all the bolts on that half until they are hand tight against the rebar.
5. In a random alternating pattern, tighten all bolts to approximately 50% of the specified bolt torque value
6. In a random alternating pattern, tighten all bolts to approximately 75% of the specified bolt torque value.
7. In a random alternating pattern, tighten all bolts until all the heads of the bolts shear off.
8. Prior to bolt tightening, the serrated rails MUST remain aligned in the same position as they were manufactured. If they are damaged or knocked out of alignment while positioning, installation MUST cease and a new coupler used.
9. Bolt tightening MUST be done in a random alternating pattern similar to tightening the lug nuts on an automobile wheel.
10. A high quality 1" pneumatic drive impact wrench,with at least 100 psig air flow and 185 CFM of delivered air through a no less than 0.75" hose MUST be used for installation.