HECKMANN BUILDING PRODUCTS INC.
1501 N. 31st Avenue
Melrose Park, IL 60160-2911
800-621-4140 and 708-865-2403
FAX: 708-865-2640

SUBMITTAL SHEET:
#425 WEDGE INSERTS (SHELF ANGLE INSERTS)
#427 ASKEW HEAD BOLTS

Standard Sizes:
Inserts: 5/8", 3/4", and 3/4" Long. Available in Plain Malleable Iron or Hotdip Galvanized After Fabrication.
Bolts: 5/8" diameter x 1-1/2", 2", 2-1/2", and 3" long.
3/4" diameter x 1-1/2", 2", 2-1/2", 3", and 3-1/2" long.
Available in Plain, Electro Galvanized After Fabrication, or Hotdip Galvanized After Fabrication. Bolts come with a nut and washer. Bolts extend 1/4" less than above lengths when installed in inserts. Wedge Inserts should be installed a minimum of 1-1/2" from the edge of the concrete.

(1) E is length of vertical adjustment for Askew head Bolts.
(2) Long Inserts provide greater adjustability and can be placed near bottom of concrete beams. Anchor loops are 3-1/2" (89)mm above bottom of insert and can be secured to bottom layer of beam reinforcing.

#425 TEST DATA

TEST 1

Method of Test: Two inserts of each kind were cast in concrete blocks intended to be of 3,000 psi compressive strength. Companion 6" x 12" cylinders tested at the time the inserts were tested showed an actual compressive strength of 3,010 and 3,280 psi. The inserts were cast flush with the 16" x 16" surface of blocks having a thickness of 10". A short length of 1/2" reinforcing bar was placed thru the insert loop in the concrete. Blocks were allowed to cure under room conditions for 28 days. Tests were made loading the bolts in two different directions, directly outward (perpendicular to the surface in which the inserts were cast Pullout), and also downward (parallel to the same surface Shear).

PULLOUT TEST: Bolts were loaded in a direction perpendicular to the surface with the bolts at the midpoint of the slots in the inserts.

SHEAR TEST: The tests pulling in a direction parallel to the surface of the concrete were made with a heavy angle block bolted at the mid point of the slot of the insert. The load was applied 2" out from the surface of the concrete. This would place some tension on the bolt, but would primarily tend to force the bolt to slip downward in the slot. The following Results were obtained:

TEST 2

Shear Test: METHOD OF TEST: ASTM E 488-76 Shear Strength of Anchor in Concrete. Parallel to Concrete Face from top of Anchor.

Concrete Fractured in all specimens, but insert did not fail. Compressive strength of concrete used at 28 days was 5,860 psi.

TEST 3

Pullout Test: METHOD OF TEST: ASTM E 488-76 Test for Strength of Anchors in Concrete.

a: Snapped Hood - Cracked Insert Slot
b: Pulled Out - Insert Intact
c: Broke Concrete - Insert Intact. Concrete Strength 6,040 psi

TEST 4 - 3/4" Long Insert Only

Concrete was poured into molds measuring 11-1/2" x 20" x 20". One insert was imbedded in the center of each mold. The inserts were malleable iron to the ASTM A-47 Grade 32510 specifications. No additional reinforcement, such as hairpins or rebar, were used in the concrete or inserts. The concrete used was 5,000 psi high early mix with the following proportions:

Cement 830 lbs Sand 1,168 lbs SSD
Stone 1/2" 1,802 lbs SSD Water 2,75 lbs
Daracem 100 66 ounces

Pullout tests were performed 6 days later when the concrete had reached a compressive strength of 4,758 psi as recorded from laboratory testing of 6" x 12" cylinders.

A Pair of I-Beams were used to span the concrete molds with a steel channel acting as a bridge. The channel held a 30 ton hydraulic jack powered by a manual pump. A hardened 3/4-10 NC threaded rod ran through the jack and bridge threading into the nut in the insert. Pressure readings were obtained using a certified calibrated gauge connected to the pump. The inserts were pulled to failure:

TEST 5: Askew Head Bolt Test

Axial Tensile Results (Requirements = 64,000 PSI Min.)
Ultimate Tensile Strength
(Tensile Testing was performed in Accordance with ASTM-F606-98)

For additional information on Specifications of Shelf Angle Inserts refer to the following:

NCMA TEK 93 - National Concrete Masonry Institute - Curtain and Panel walls of Concrete Masonry. 1977

BIA TECH NOTE 28B - Brick Institute of America - Brick Veneer Panel and Curtain Walls. February 1980

ANSI B18.2.1 1965 revised 1970 - Askew Head Bolts - American National Standards Institute.

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