Page 285 - ZSi-Foster Product Catalog
P. 285
Concrete Inserts
Standard Finish: Pre-Galvanized (PG)
Flared Wedge Concrete Inserts Unlike hook type inserts, higher stress concrete increases
VC9000 loading capabilities
1 ⁄8" x 1 ⁄8" x 2 ⁄16" - 12 Gauge
11
7
5
The VC9000's distinctive shape, consisting of a standard strut channel Introduction
backed by an abruptly flared wedge, is a multi-purpose design. In addition
to incorporating the anchoring wedge, the design gives the insert an
extremely rigid beam strength. This stiff beam characteristic helps the
VC9000 to distribute concentrated spot loads over its embedded length
with maximum efficiency. Thus the VC9000 minimizes spot loadings on Channel
the supporting concrete and simultaneously eliminates cracking problems
caused by sharp edges of hook anchors which act as stress risers.
The VC9000 does not rely on hooks or straps to anchor its load to the
concrete but rather distributes the load evenly upon mating surfaces of
concrete and insert wedge area. Hook and strap inserts have an anchoring Channel Nuts & Hardware
capacity determined by the anchor's resistance to pull out. Loading failures
of this type insert are generally characterized by straightening or tearing
of the hooks or straps during pull out If the anchors are welded to the
insert, then weld failure can further lower 6 the loading capacity. Increasing
the concrete's compressive strength above the minimum required does General Fittings
not increase the hook or strap style insert's loading capacity. Since the
VC9000's flared wedge locks the load within the encasing concrete, then
by increasing the concrete's strength, the VC9000's loading capacity is
Uniform Design Load increased. Because the VC9000 has this unique loading characteristic,
Concrete Strength designers can take best advantage of the extra supportive strength
per L.F. † Lbs. (kN) automatically provided by the modern higher strength concretes. Brackets
3,500 psi 2,100 (9.34 kN)
4,000 psi 2,500 (11.12 kN) NOTE: To reach maximum resistance to pull out of the nut in continuous
5,300 psi 2,650 (11.79 kN) concrete inserts, a fitting should be mounted on the slot surface and the
† Safety Factor = 3 rod or bolt connected. Without an exterior fitting, nut pull out resistance is Beam Clamps
reduced to approximately one half of the normal load rating. Pull out load
ratings for channel nuts are shown on page 74. VCN style concrete insert
nuts also work with VC9000 and can be found on page 276.
COMPARATIVE PERFORMANCE CHARACTERISTICS OF Pipe & Conduit Supports
CONCRETE INSERTS IN HIGHER STRENGTH CONCRETES
3000
FLARED WEDGE INSERT Electrical Fittings
INSERT ANCHORING CAPACITY, UNIFORMLY DISTRIBUTED LOAD, LBS./LINEAL FT. SAFETY FACTOR = 3 2000 AVERAGE FOR 12ga ANCHOR INSERT Spring Concrete Steel Inserts
2500
1500
1200
Rooftop Supports
AVERAGE FOR 14ga ANCHOR INSERT
3000 3500 4000 4500 5000 5500
CONCRETE COMPRESSIVE STRENGTH , P.S.I. Technical
Uniform Design Load (S.F. 3) Data
7
5
9
1
13
Hole Diameter: ⁄16" (14mm); Hole Spacing - From End: ⁄16" (21mm); Hole Spacing - On Center: 1- ⁄8" (48mm); Width: 1- ⁄8"(41mm); Thickness: ⁄4" (6mm)
In 3500 psi. concrete: 2100 lbs. (9.4 kN) per L.F.
www.zsi-foster.com In 4000 psi. concrete: 2500 lbs. (11.3 kN) per L.F. – 285 –
In 5300 psi. concrete: 2650 lbs. (11.9 kN) per L.F.
WARNING: Cancer and Reproductive Harm Warning. For more information go to www.P65Warnings.ca.gov.