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General Technologies, Inc.® is proud to present the most reliable Fully Encapsulated Corrosion Protection System available to the Post-Tensioning Industry today. The GTI Zero Void® Encapsulation System is a proven method of providing corrosion protection for unbonded tendons.

The Zero Void® System eliminates the need to strip the plastic sheathing protecting the strand prior to stressing. GTI has perfected a special tool, the GTI Sheathing Stripper®, to remove the sheathing from inside the anchor cavity immediately prior to stressing. There is no bare strand exposure.

The Zero Void® System eliminates the need to fill tubes with grease as required by ACI 423.6 & the PTI Guide Specification. The Zero Void® System uses seals to provide thermal tolerance for shrinkage of the sheathing. The Zero Void® Fixed End, or Dead End, anchor can be push seated in the fabricator’s plant or hand installed by using a Zero Void® anchor with spring-loaded wedges in the field, thus eliminating pull seating of the fixed-end wedges and the need for a grease filled tube to protect the strand.

The Zero Void® Nail-Less Pocket Former® was designed to eliminate the use of nails to fasten the stressing anchor to the edge form, eliminating staining of the concrete surface.

The Zero Void® System utilizes the GTI Plasma Cutter® to cut tendon tails after stressing. The GTI Plasma Cutter® generates a minimal amount of heat during cutting and has no effect on the heat treatment on the strand and the wedges compared to oxy-acetylene torch cutting. The GTI Plasma Cutter® quickly cuts the tendon tail to a precise length, unlike other methods, so that the Zero Void cap can be quickly and permanently locked in place.

GTI’s patented Zero Void® Grease Cap was created especially for the Zero Void® System. The cap is supplied as part of the Zero Void® system and is pre-filled with grease that is held in place by our patented clear membrane. The clear membrane will be broken by the cut tail of the PT tendon when the cap is locked into place. Once the clear membrane has been broken, the grease displaced by the tendon tail will fill the wedge cavity, further increasing the corrosion protection within the assembly.

Our patented system consists of a cast anchor encapsulated in a thick (80 mil) high density polyethylene material with excellent chemical and cold temperature resistance. This hard coating makes the system more dependable than the ordinary epoxy coating that is currently available in the market today.

GTI’s Zero Void® System meets or exceeds the latest PTI & ACI requirements for mono-strand corrosion protection systems. The GTI Zero Void® System is a significant advancement in corrosion protection of unbonded tendons for post-tensioned concrete construction.

US PATENT No. 4,896,470; 5,072,558; 5,436,425; 5,440,842; 5,755,065; 5,770,286;

5,788,398; 5,839,235; 5,897,102; 6,017,165; 6,151,850; 6,176,051

US AND FOREIGN PATENTS PENDING 1/07

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206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Translucent Seal

206314 6" Zero Void ®

Seal

206303 Zero Void ®

Pocket Former, 2"

2043032" Pocket Former

207301 Zero Void ® Encapsulation

w/Metal Ring (Oxyacetylene)

206304 Zero Void ®

Pocket Former, Mandrel

206109Clear D.E./ L.E.

Cap with Grease206302

Zero Void ®

Cap with Grease

206310 Zero Void ® Encapsulation

withSpring-Loaded Wedges

206302 Zero Void ® Cap with Grease

201102 Wedges

Detail: Metal Ring

with Groove

201102 Wedges

206305 Zero Void ®

Pocket Former Nut

US PATENT No. 4,896,470; 5,072,558; 5,436,425; 5,440,842; 5,755,065;5,770,286; 5,788,398; 5,839,235; 5,897,102; 6,017,165; 6,151,850; 6,176,051US & FOREIGN PATENTS PENDING

206301 Zero Void ®

Encapsulation (Plasma)

Spring-Loaded Fixed End

Fixed End

Stressing End

206301 Zero Void ®

Encapsulation

206301 Zero Void ®

Encapsulation

206301 Zero Void ®

Encapsulation

206350 Zero Void ®

Intermediate Coupler

Assembly

206350 Zero Void ®

Intermediate Coupler Assembly

Intermediate Anchorage

0.5" Zero Void®

Mono-Strand Corrosion Protection System

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1/07

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Translucent Seal

206414 6" Zero Void ®

Seal

206403 Zero Void ®

Pocket Former, 2"

2044012" Pocket Former

207401 Zero Void ® Encapsulation

w/Metal Ring (Oxyacetylene)

206404 Zero Void ®

Pocket Former, Mandrel

206209Clear D.E./ L.E.

Cap with Grease206402

Zero Void ®

Cap with Grease

206410 Zero Void ® Encapsulation

withSpring-Loaded Wedges

206402 Zero Void ® Cap with Grease

201202 Wedges

Detail: Metal Ring

with Groove

201202 Wedges

206405 Zero Void ®

Pocket Former Nut

US PATENT No. 4,896,470; 5,072,558; 5,436,425; 5,440,842; 5,755,065;5,770,286; 5,788,398; 5,839,235; 5,897,102; 6,017,165; 6,151,850; 6,176,051US & FOREIGN PATENTS PENDING

206401 Zero Void ®

Encapsulation (Plasma)

Spring-Loaded Fixed End

Fixed End

Stressing End

206401 Zero Void ®

Encapsulation

206401 Zero Void ®

Encapsulation

206401 Zero Void ®

Encapsulation

206450 Zero Void ®

Intermediate Coupler

Assembly

206450 Zero Void ®

Intermediate Coupler Assembly

Intermediate Anchorage

0.6" Zero Void®

Mono-Strand Corrosion Protection System

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