DTI Sandwiches

The SQUIRTER® DTIs Sandwich is an assembly made for tensioning anchor bolts, easily.

These assemblies can be used directly against concrete or slotted holes. Possible applications are concrete crash barriers, bridge bearings, high mast light poles, sign structures and transmission poles.

The components of the SQUIRTER® DTIs Sandwich:

An F436 flat washer
Special load SQUIRTER® DTIs
A 1/4" thick plate washer (which can be used on non-standard holes and materials other than steel)

This product is available in calibrated assemblies to suit anchor bolts from 5/8" to 1 1/2" diameter. All are zinc coated assemblies.

Tension Loads Available

Standard assemblies are calibrated to squirt at the following bolt tensions: (custom loads available on request)

5/8"	13 -17 Kips	1"	36 - 45 Kips
3/4"	20 - 25 Kips	1-1/8"	39 - 47 Kips
7/8"	27 - 33 Kips	1 1/4"	50 - 62 Kips
1 1/2"	70 - 89 Kips

Just slip them over the anchor bolt and then turn down the nut against the sandwich until the silicone squirts out. Then stop. That's all there is to it. No guessing at torque or turn of nut.


Finished Sandwich Flat Washer on top SQUIRTER® DTIs in the middle. Plate washer on the bottom	Anchor bolt sandwich in place before tensioning.	Anchor bolt after tensioning. Note orange silicone squirts indicating the bolt is at the correct tension.

Benefits of SQUIRTER® DTIs Sandwiches

The hole in the base plate can be torch cut, oversized or slotted, the SQUIRTER® DTIs still works.

Tension in the anchor bolt at Squirt is set lower than with standard high strength bolts.
Tension is independent of the torque resistance of the nut
Visually inspectable. It's easy to see the bolt has been properly tensioned. Just look for the Squirt
Reduces liability. You know something has been done to put tensioned the anchor bolts.
Allows OSHA sign-off for anchor bolt tightening
Reliability: you can tell the bolt has been tensioned regardless of torque
Anyone can do it
Inexpensive, call for a price quote