Tips & News - April 2011
GROUTED ROCK ANCHOR NEW SOLUTION FOR BROKEN ROCK TIPS NEWS &
helps improve lightning protection WEB APPLICATION TOOL NEW OHIO BRASS
Installing anchors in rocky soils is a difficult and expensive task for utilities. For solid rock conditions, our wedge-style rock anchors work great. Now, for broken rock conditions too tough for a screw anchor to penetrate, our new Grouted Rock Anchor can be just the right solution!
Visit http://www.hpsapps.com/protec- talite/ to use a new tool to help you evaluate lightning performance for typi- cal 34.5, 69, 138 and 230 kV lines. Using the tool, you can determine impact of structure footing resistance on shield wire protection while you see the impact of adding surge protection to line insula- tion. You can study the impact of various arrester spacings, too. An easy link takes you to technical field support for more detailed analysis of specific lines. It’s quick, easy and informative. Try it today!
GROUTED ROCK ANCHORS Application Table for Cat. No. W104-0004 and W104-0055
Allowable Load Capacity for 6" dia x 1' long
Ultimate Bond Stress between Rock & Grout psi
grout column lb/ft of length
Granite Basalt
200
1500
Dolomitic Limestone
Soft Limestone Slates & Hard Shales
100
7500
Sandstone
Soft Shales
30
1800
www.hpsapps.com/protectalite/
Soil Class 5
8
600
For details on our Grouted Rock Anchor, see Catalog Supplemental Bulletin 4-24.1&2 on our web site or request your copy today! Grouted Rock Anchor SystemBenefits • Employs our RR or SS extensions and guy adapters • Uses standard grout sold at home center stores • Holding capacity chart provides engineering reference for various rocks and soils
For all our Anchors and Anchor Tools,see our Catalog Sections 4 & 4A on our web site.
For more information, contact your Hubbell Power Systems repre- sentative, fax 573-682-8714 or e-mail hpsliterature@hps.hubbell.com.
14 www.hubbellpowersystems.com
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