EWP Hangers - USP Connectors
EWP Hangers - USP Connectors
EWP Hangers - USP Connectors
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Undercut Anchoring Systems - DUC Ductile Undercut Anchors<br />
Mechanical anchor expanded into a hole that has been undercut at the<br />
bottom using an undercutting drill bit creating a true bearing type anchor<br />
that performs like a cast-in-place headed anchor. Load is transferred into<br />
the concrete through bearing, not friction like traditional expansion<br />
anchors. Excellent performance in seismic and dynamic loading<br />
conditions. Meets ACI 318-02 Appendix D requirements as a code<br />
anchor, including seismic loading, tension zone, and cracked concrete<br />
provisions.<br />
DUC<br />
Undercut Anchor<br />
© Copyright 2013 <strong>USP</strong> Structural <strong>Connectors</strong> ®<br />
Rod Materials: ASTM A36 (L Series), A193 Grade B7<br />
(H Series), or AISI 316 Stainless Studs<br />
Anchor Body Materials: ASTM A 513 Type 5, or AISI 316 Stainless<br />
Installation:<br />
UCB<br />
Undercut Drill Bit<br />
Concrete & Masonry<br />
Drill the hole to<br />
proper depth<br />
and diameter<br />
per specifications<br />
using<br />
rotohammer<br />
and stop drill.<br />
Clean the<br />
hole using a<br />
blow-out bulb<br />
or compressed<br />
air.<br />
Insert the<br />
undercut bit<br />
and start the<br />
rotohammer.<br />
Undercutting is<br />
complete when<br />
the stopper<br />
sleeve is fully<br />
compressed<br />
(gap closed).<br />
Clean the hole<br />
again using a<br />
blow-out bulb<br />
or compressed<br />
air.<br />
Insert anchor<br />
into hole. Place<br />
setting sleeve<br />
over anchor<br />
and drive the<br />
expansion<br />
sleeve over<br />
the expansion<br />
coupling.<br />
Verify that the<br />
setting mark<br />
is visible on<br />
the threaded<br />
rod above the<br />
sleeve.<br />
Apply proper<br />
torque.<br />
lb<br />
dc<br />
db<br />
Tension and Shear Capacities for DUC<br />
Anchors in f’c > 2,500 psi concrete<br />
hef<br />
ho<br />
<strong>USP</strong><br />
Stock No.<br />
DUC38-275L<br />
DUC38-275LT<br />
DUC38-400H<br />
DUC38-400HT<br />
DUC12-400L<br />
DUC12-400LT<br />
DUC12-500H<br />
DUC12-500HT<br />
DUC12-675H<br />
DUC12-675HT<br />
DUC58-450L<br />
DUC58-450LT<br />
DUC58-750H<br />
DUC58-750HT<br />
DUC58-900H<br />
DUC58-900HT<br />
DUC34-500L<br />
DUC34-500LT<br />
DUC34-1000H<br />
DUC34-1000HT<br />
Rod Dia. d b<br />
Expansion<br />
Coupling Dia. d c<br />
Drilled Hole<br />
Depth of Stop Bit h o<br />
Anchor<br />
Length, l b<br />
in mm in mm in mm in mm in mm Lbs kN Lbs kN<br />
3-1/8 79.4 2-3/4 69.9 5-1/2 139.7 4650 20.69 2790 12.41<br />
3/8 9.5 5/8 15.9<br />
4-3/8 111.1 4 101.6 6-3/4 171.5 9690 43.10 5815 25.87<br />
1/2<br />
5/8<br />
3/4<br />
12.7<br />
15.9<br />
19<br />
3/4<br />
1<br />
1-1/8<br />
19<br />
25.4<br />
28.6<br />
1) Factored resistance and shear capacities are for anchors installed at standard edge distance and spacing in<br />
uncracked concrete. For cracked concrete capacities, see the <strong>USP</strong> Anchoring Systems Design Guide.<br />
4-1/4<br />
5-1/4<br />
7<br />
5<br />
8<br />
9-1/2<br />
5-7/8<br />
10-7/8<br />
107.9<br />
133.4<br />
177.8<br />
127<br />
203.2<br />
Effective<br />
Embedment h ef<br />
4<br />
5<br />
6-3/4<br />
4-1/2<br />
7-1/2<br />
114.3<br />
190.5<br />
7<br />
8<br />
9-3/4<br />
7-3/4<br />
10-3/4<br />
13-5/8<br />
177.8<br />
203.2<br />
247.6<br />
196.9<br />
273.1<br />
241.3 9 228.6 12-1/4 311.2<br />
149.2<br />
276.2<br />
5<br />
10<br />
101.6<br />
127<br />
171.5<br />
127<br />
254<br />
8-5/8 219.1<br />
346.1<br />
Ultimate<br />
Tensile<br />
Capacity, N s<br />
8515 37.88 5110<br />
17740<br />
13560<br />
78.91<br />
60.32<br />
28250 125.67 16950<br />
Ultimate<br />
Shear<br />
Capacity, V s<br />
10645<br />
8135<br />
20040 89.15 12025<br />
41750 185.72 25050<br />
22.73<br />
47.35<br />
36.19<br />
75.40<br />
53.49<br />
111.43<br />
1-800-328-5934 • www.<strong>USP</strong>connectors.com<br />
25<br />
<strong>USP</strong>2240-131
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