BLOK-LOK RESTORATION
SPIRA-LOK ® WALL TIE SYSTEM
Spira-Lok ® Features and Benefits One Piece Anchor
Simplified handling and increased site productivity.
Austenitic Stainless Steel
Long term durability.
Helical Configuration Acts as a drip and maximizes cutting edge contact. Provides self-tapping action. Simulates thread conditions without pre-load stress. Accommodates in-plane cyclic loading. Provides flexibility to accommodate differential movement between wythes. Central Core Cruciform Shape Optimizes axial strength in tension and compression. Dissipates installation energy and centralizes load transfer. Pointed End Symmetry Easy installation. Only a Small Pilot Hole Required Minimal visual impact.
Can be used in any climatic condition. Eliminates substrate preparation, enhances in-plane ductility and is less problematic.
No Adhesive Required
Pullout Resistance Engineered Design
Up to TEN (10) times conventional wall tie capacity.
Can be tested for performance verification on site and will work in various building materials.
Spira-Lok ® Performance Characteristics
Ultimate Tension/Compression (lbs.) 8mm 10mm
Effective Minimum Embed (inches)
Material
Mortar Joint (100 psi) Solid Brick (9000 psi) Cavity Brick Normal Weight CMU
3-1/4
616
780
3-1/4
700
700
Reduced Diameter
3-1/4
1280
1390
1-1/4
801
907
Spira-Lok ® Properties (ultimate buckling strength) Unsupported Length in. (mm) Capacity (lb.) 8mm 10mm 1 (25) 1638 2335 2 (50) 1290 1613 4 (100) 690 1185 6 (150) 375 614 Spira-Lok ® Asymmetrical Ties are dual diameter Spira-Lok ® Stainless Steel Helical Wall Ties designed for use in connecting soft veneer materials to a hard back-up. Typically a larger installation pilot hole is required in hard substrates, such as concrete or brick, than, for example, in a soft veneer mortar. Since drilling a larger diameter pilot hole behind a small entry hole in the veneer is not possible, Blok-Lok supplies a dual diameter Spira-Lok ® Asymmetrical Tie with a smaller diameter on the end being installed in the substrate. This ensures the connection in both the veneer and substrate attain optimum pull-out loading in service.
Light Weight CMU
2
550
550
Concrete (3500 psi)
1-1/2
1200
1300
Kiln Dried Wood Stud 2x4
3
517
N/R
3
520
N/R
2x6
Metal Stud
16 Gauge
310
N/R 650 800 620 N/R
Granite
1-1/8
620 590 600
Travertine Limestone 3/16” Steel
7/8
3
3/16
520
Spira-Lok ® Physical Characteristics (nominal dimensions) Outside Diameter 8mm 10mm Pitch Length: in. (mm.) 0.84 (21.4) 1.0 (25.4) Tie Cross-Sectional Area: in 2 (mm 2 ) 0.017 (11.6) 0.022 (14.2) Yield Strength: ksi (MPa) 65.9 (455) 73.8 (509) Tensile Strength ksi (MPa) 137.0 (950 137.0 (950 *Material: ASTM A-167 Type 304 (Stainless Steel)
40
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