Dayton Loads

  • Rated load – The maximum load that should be applied to a Form Hanger, Bridge Overhang Bracket or related item. Safe working load or S.W.L. are other terms used in this handbook for rated load.
  • Ultimate load – The average load or force at which an item fails or will no longer support or carry a load.
  • Formwork Dead Load – The weight of the reinforced concrete plus the weight of the formwork.
  • Formwork Live load – Additional loads imposed during the process of construction such as materials storage, workmen, and equipment.
  • Formwork Design Load – Dead Load plus live load per square foot of form contact area.
  • Formwork Impact Load – A resulting load from dumping of concrete or the starting and stopping of construction equipment on the formwork. An impact load may be several times a design load.
  • Factor of Safety – A term denoting theoretical reserve capability which has been determined by dividing the ultimate load of the product by its rated load. This in expressed as a ration; for example 2 to 1.

Dayton Superior A-27 Turnbuckle Form Aligner

  • Turnbuckle form aligners accurately position forms.
  • The 1/5” x 1.5” x 20” angle is provided with nail holes at 6” on center for nailing to a 2 x 4 or 2 x 6.
  • The turnbuckle section is 1” diameter coil thread which is self-cleaning and gives rapid adjustment. 3.5 turns of the turnbuckle gives 2” of adjustment. The overall length of 37” closed, 40” extended with 3” of adjustment.
  • The nailer plate has a 15/16” diameter hole that can be used with either a ¾” or 7/8” diameter steel stake or bolt.
  • The safe working load is limited by the lumber, as well as the mailing and staking procedures used.


Dayton Superior B-12 Continues Coil Threaded Rod


  • May be field cut with Carborundum blades without damaging threads.
  • Requires two B-13 or one B-25 Coli Nut in order to develop the Safe Working Load.
  • Available in any length – up to 20 ft on special order
  • Also available in 1”, 1.25” and 1.5” diameters


Dayton Superior Adjustable Coil Bolt


  • An adjustable coli bolt consists of a length of coil rod having a B-13 hex nut welded at one end, along with a free running B-13 hex nut.
  • The B-14-A Adjustable Coil Bolt permits formwork adjustments to be made with the use of the free running nut. This adjustable bolt accommodates different thicknesses of lumber, easily handles bridge deck forming, and is a versatile bolt for use in all types of formwork applications.
  • Adjustable bolts may be reused – however they do wear and must be continually inspected and replaced when wear or damage is noted. A water proof grease should be applied to that portion of the bolt which will be embedded in the concrete.


Dayton Superior B-13 Coil Nut and B-25 Heavy Coil Nut

  • Also available for use with 1”, 1.25” and 1.5” diameter coil rod and bolts

Dayton Superior B-32 Handle Coil Nut

  • The B-32 handle coil nut is a B-13 hex coil nut which has a wire loop handle to it. It is designed for use in situations which requires the quick application or removal of a nut. Coil nuts can speed up the installation and stripping of formwork.

Dayton Superior B-27 Nut Washer

  • The nut washer combines the advantages of a washer and nut into a one piece unit. Nut washers are designed to spread colt loads over wood form members. It has four nail holes for securing the nut washer to the form work.

Dayton Superior B-39 Wing Nut Cast, Coil Thread

  • The B-39 wing nut is made of ductile iron and can be used for any application requiring quick removal and application of a nut.

Dayton Superior Flat Washer

  • For use with all size and types of bolts and coil rods
  • Made from carbon steel
  • The B-11 washer is designed for a maximum space between ledgers not to exceed bolt diameter plus ½”
  • Also available for use with 1”, 1.25” and 1.5” diameter bolts.

Dayton Superior Batter Washers

  • Batter washers are use when the ledgers are at any angle to the coil rod. Permitting any angle form 90 degrees to 45 degrees. For use with coil rod and B-39 wing nut cast.
  • Nail holes are provided for securing to wood form members.






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