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Historic Preservation - Technical Procedures

Spectitle:

Installing Steel Bar Anchors Into Brick Unit Masonry With Resins

Procedure code:

0415002R

Source:

Jacob Weinberger Us Courthouse, San Diego, Ca

Division:

Masonry

Section:

Masonry Accessories

Last Modified:

02/24/2012

Details:

Installing Steel Bar Anchors Into Brick Unit Masonry With Resins



INSTALLING RESIN ANCHORS INTO BRICK UNIT MASONRY


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on embedding threaded
         rods in epoxy or polyester resin in holes drilled into
         brick masonry walls to provide anchors for attachment to
         hardware connected to the framing of the building.  

         CAUTION: THIS PROCEDURE CAN DAMAGE AND/OR HAVE AN ADVERSE
         EFFECT ON HISTORIC MASONRY IF NOT PLANNED AND IMPLEMENTED
         PROPERLY.  CONSULT THE REGIONAL HISTORIC PRESERVATION
         OFFICER FOR APPROVAL BEFORE PERFORMING THIS TYPE OF WORK
         TO ENSURE THAT THE MOST UNOBTRUSIVE RESULTS WILL BE
         OBTAINED.

    B.   See 01100-07-S for general project guidelines to be
         reviewed along with this procedure.  These guidelines
         cover the following sections:

         1.   Safety Precautions

         2.   Historic Structures Precautions

         3.   Submittals

         4.   Quality Assurance

         5.   Delivery, Storage and Handling

         6.   Project/Site Conditions

         7.   Sequencing and Scheduling

         8.   General Protection (Surface and Surrounding)

         These guidelines should be reviewed prior to performing
         this procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Abatron, Inc.
         141 Center Drive
         Gilberts  IL  60136
         (312) 426-2200

    B.   Sika Corporation
         P.O. Box 297
         Lyndhurst  NJ  07071
         (201)933-8800

2.02 MATERIALS

    A.   Resin:  The resin shall be a two-component, structural
         epoxy or polyester resin adhesive.  The components shall
         be pre-measured in separate cartridges.

    B.   Threaded Rods:  Threaded rods shall be sized according to
         need and loading requirements.  Consult with structural
         engineer and Regional Historic Preservation Officer
         (RHPO).

    C.   Screen Tube:  Screen tubes shall be 7/8 inch diameter,
         approximately 28 wire per inch square mesh screen.

    D.   Mixing Nozzle:  The resin components may be automatically
         mixed by a nozzle that is secured to the component
         cartridge.

2.03 EQUIPMENT

    A.   Electric drill with mixing paddle provided by adhesive
         manufacturer.

    B.   Pail in which to hand mix adhesive.


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Holes:

         1.   The drill holes should be sized according to the
              rod used.  Typically, the hole shall be no greater
              in diameter than 1/8-inch or 1/4-inch (depending on
              the adhesive used) larger than the pin to be
              embedded, and ten to fifteen bar diameters deep.  

         2.   Drill shall be non-impact type rotary drill with a
              masonry bit.

         3.   Clean holes with high pressure air and a stiff
              nylon brush.

    B.   Installation:

         1.   Verify the rod length as appropriate for the depth
              with at least 1-1/2" projection.  NOTE:  Projection
              may be more or less depending on use.

         2.   If using automatic pressure-injection equipment,
              resin shall be automatically measured and mixed in
              the mixing nozzle.  

         3.   If mixing by hand, mix each component by volume as
              directed by manufacturer into clean pail.
              Components shall be used straight, without any
              additives.  Mix thoroughly for time specified by
              manufacturer with low-speed drill (400-600 rpm)
              fitted with appropriate paddle.  Blend until
              uniform color is achieved.

         4.   Place the resin into the screen tube.  Completely
              fill the screen tube.  Begin placement at the end
              of the screen and withdraw the nozzle as the screen
              fills.

         5.   Insert the screen tube and resin into the hole.

         6.   Slowly insert the threaded rod into the resin to
              the full depth of the hole.

         7.   Do not disturb the anchor until the adhesive has
              cured.  Follow manufacturers instructions.

         8.   No gaps shall be visible between the rod and the
              masonry.

         9.   Conform with all requirements of the ICBO Research
              Report for the product, Manufacturers'
              Recommendations, and all applicable Building and
              Safety Guidelines.  These referenced documents
              shall be on the job and referred to when the work
              of this Section is underway.

3.02 ADJUSTING/CLEANING

    A.   Remove spills and excess adhesive with absorbent
         material, flush with water.  

    B.   Uncured material can be removed with solvent as
                   recommended by adhesive manufacturer.  

    C.   Do not allow excess material to cure as cured adhesive
         can only be removed mechanically.

                         END OF SECTION