Chance Technical Design Manual

HELIX MUST BE FORMED BY MATCHING METAL DIE

T112-0338

SIDE VIEW OF TRUE HELICAL SHAPE

LIGHTING FOUNDATION CAT NO T112-0592 FIGURE 10-1E

INSTANT FOUNDATION SYSTEM DESIGN STEPS

CHECK WITH LOCAL BUILDING CODE AGENCY. Determine general geotechnical soil conditions (see Section 2) • Soil Profile • Soil Classification • Standard Penetration Test Results • Other Test Results

SELECT INSTANT FOUNDATION PRODUCT

• Diameter • Shaft Length

PERFORM ULTIMATE CAPACITY ANALYSIS

• H ult - Lateral Load Capacity • M ult - Overturning Moment Capacity

POLE BASE FOUNDATIONS

(See design guidelines on following pages)

DEFINE THE LIGHT STANDARD OR COLUMN • Type • Size and Height

APPLY FACTOR OF SAFETY TO ULTIMATE CAPACITY H ult or M ult Compare results to selected Instant Foundation product design capacity or project requirements.

DETERMINE STRUCTURAL LOADS

• Dead Load (DL) • Lateral Load (H d ) • Overturning Moment (M d ) • Factor of Safety (FS)

COMPLETE DESIGN DETAILS

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