Chance Technical Design Manual

INTRODUCTION Hubbell Power Systems, Inc. manufactures pole base founda tions to provide resistance to lateral loads and moment loads due to wind and other load conditions. The versatility and ease of construction of these pole base foundations, known as Chance® Instant Foundations®, permits great flexibility in a number of applications. Typical uses for these products are foundations for equipment pads, foundation supports for signs, supports for light standards and decorative poles, EV charging station foundations, 5G pole foundations, and other eccentric load applications.

DESIGN RECOMMENDED FACTORS OF SAFETY FOR DESIGN

The variability of soil conditions that may exist at a project site, plus the varied nature of loading on structures and how these loads are transferred through foundation elements, requires the consulting engineer and/or dealer/ installing contractor to use an appropriate factor of safety (FS) in design for use with the Chance® Instant Foundations® system. Generally this factor of safety is a minimum of 2:1 on all permanent loading condi tions and a minimum of 1.5:1 For any temporary load situation. National and local building code regulations may require more stringent factors of safety on certain projects. DESIGN GUIDELINES Instant Foundations provide manufactured single helix fixed length products for use as foundations for varied applications such as light poles, signs and equipment supports. There are many applications for these tubular helical specialty products. Each application will require: 1. An evaluation of the soil strata and soil characteristics of that stratum in which the product will be installed. 2. A selection of the appropriate Instant Foundation product shaft diameter, shaft length, base plate size, bolt diameter and bolt circle diameter. 3. A determination of the ultimate bearing capacity and suit able Factor of Safety. NOTE: The design should involve professional geotechnical and engineering input. Specific information involving the struc tures, soil characteristics and foundation conditions must be used for the final design. The following preliminary design guide information is intended to assist dealers, installing contractors, and consulting engi neers to select the appropriate Chance pole base foundation to resist overturning moment and lateral load. The Hubbell Power Systems, Inc. Pole Load Determination Data Sheet is provided in this section. This can be used to gather and record the information required to determine the loads to be applied to a light pole foundation. The loads and given soil conditions are then used to determine the appropriate Instant Foundation product size required for the job. The Select-a Base™ Lighting Base Program is an on-line program used for preliminary foundation selection. The program incorporates a database of Chance pole bases. The program inputs include loading conditions (wind, moment, and/or lateral), pole/pole arm details and soil data. The software is free and easy to use on-line at www.hpsapps.com.

PRODUCT BENEFITS Instant Foundations offer the following benefits: • Fast installation. • No vibration. • Ease of installation in limited access areas. • Minimum disturbance to site. • No excavation required. • All steel foundation. • Immediate structure installation. • Ready for immediate wiring. • All weather installation. • On-site load test capability.

This section describes the Chance Instant Foundations system products for overturning moment loads and lateral support that are typically maintained in stock to provide quick delivery to the project site. Table 10-1 and Figure 10-1 illustrate just a few of the Instant Foundations products that are available in each of the product series. Our manufacturing facility is capable of rapidly fabricating products to suit the application. For pole bases that require bumper/impact protection, a pre-cast collar option is available (see Figure 10-2)

INSTANT FOUNDATIONS SYSTEM PRODUCT SELECTION, TABLE 10-1

POLE BASE FOUNDATIONS

DETAIL CATALOG NO

PILE DIA LENGTH

A

T1120143

3-1/2”

5’ - 0”

B

T1120338

4”

4’ - 8”

C

C11232JG4VL

6-5/8”

5’ - 0”

D

C11242NG4VP

8-5/8”

5’ - 0”

E

T1120592

10-3/4”

5’ - 0”

Notes: 1. Manufacturer to have in effect industry recognized written quality control for all materials and manufacturing processes. 2. All material to be new, unused and mill traceable meeting specifica tions found on product drawing. 3. Additional lengths and configurations are available as standard cata log numbers.

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