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Steel Dog SCL-4 Coil-Lag with 3/4" hex head lag bolt

Quick Overview

  • 3/4" hex head lag bolt with swiveling loop coil tie
  • Available for 1/2" coil rod or 1/2"-13NC machine thread
  • Useful for one-sided walls against wood lagging
  • 3000 lbs Max. Safe Working Load (see load tables)
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Details


3/4" hex head lag bolt with swiveling loop coil tie
Available for 1/2" coil rod or 1/2"-13NC machine thread
Useful for one-sided walls against wood lagging
3000 lbs Max. Safe Working Load (see load tables)
The Steel Dog Coil-Lag is designed to provide a temporary means of attaching formwork to wood timbers. Typical application: one-sided forming against soldier piles with wood lagging, or other timber retaining walls.

FEATURES :
Standard hex head lag bolt for socket wrench or powered driver installation.
Swivel loop coil tie end to accommodate misalignment between lag bolt placement and formwork tie location.
Accepts standard ½”coil rod or ½”-13 NC rod (SCL-4NC)
Less expensive than toggle ties, and doesn’t require clear space behind timber (compacted fill not a problem).
Eliminates expensive external bracing or welding.

MATERIAL :
Bolt is ASTM A307. Swivel loop wire is AISI C1038.

FINISH :
None. Zinc coatings available: consult factory.

MAXIMUM SAFE WORKING LOAD :
3000 Lbs. (2-to-1 safety factor). Actual Safe Working Load will depend on pull-out strength of lag in wood and off-axis loading angle. See tables at right.

INSTALLATION :
Install only into pre-drilled hole (9/16” diameter MAX) Use wax or other suitable solid lubricant on lag bolt threads (especially in hardwood species.)

Screw bolt into wood using wrench on bolt hex head only. Do not use swivel loop to turn bolt. If excessive resistance is met, unscrew bolt and re-lubricate or change bolt location. If using powered socket driver (such as right angle drill or impact wrench), apply 400 ft-lb max torque. Bolt must be screwed into wood until swivel loop is just in contact with wood surface.

If wood splits when installing lag bolt, the bolt will not hold the rated load. Move bolt location at least 1-1/2” across grain.

Swivel loop may be loaded up to 30° off-axis when rotated in “A” direction, and up to 90° off-axis when rotated in the “B” direction (see diagram at right).

Generally, the withdrawal resistance of the bolt from the wood and the off-axis load angle will determine the allowable tie load on the swivel loop coil. When loading off-axis, (see tables at right), consideration must be given to translation forces or torque on timber element due to lateral bolt loads. Not intended for installation into end grain.

WOOD LAGGING LOADS

Because wood lagging timber widths vary, and are unlikely to match the formwork tie spacing, the lag bolt locations will vary on the pattern of wood lagging. Ideally, there should be a row of Coil-Lags attached to every lagging timber so that the liquid concrete pressure is spread evenly. If some timbers are skipped, then timbers without Coil-Lags will see a net bending moment in a direction opposite to the soil pressure loading, and adjacent timbers with Coil-Lags will see a net bending moment in the same direction as the soil pressure load. THIS ADDITIONAL LOAD ON THE TIMBERS MUST BE FACTORED INTO THE DESIGN OF THE SOLDIER PILING, FORMWORK, AND ALLOWABLE POUR PRESSURE. Using Transition Ties and Coil-Lags This example shows how Steel Dog Coil-LagsTM are used to secure Steel-Ply forms to wood lagging for a one-sided pour. (The same concept applies to 1-1/8” forms, aluminum forms, or the other forming systems that Transition TiesTM connect to.)

Additional Information


Manufacturer: Steel Dog
For More Information on the Coil-Lag, [Click Here] to Link to Manufacturer Web Site