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SALSA

SALSA. FLORENCE & HUTCHESON LEE SEWELL, PE, SE. WHAT IS SALSA?. SIGNAL AND LIGHTING STRUCTURAL ANAYLSIS (SALSA ) ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES. HISTORY OF PROJECT. STARTED IN 2007 EXPAND ON EARLIER GEOTECHNICAL EVALUATIONS DONE BY DARRIN BECKETT IN 2004.

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SALSA

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  1. SALSA FLORENCE & HUTCHESON LEE SEWELL, PE, SE

  2. WHAT IS SALSA? • SIGNAL AND LIGHTING STRUCTURAL ANAYLSIS (SALSA) • ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES

  3. HISTORY OF PROJECT • STARTED IN 2007 • EXPAND ON EARLIER GEOTECHNICAL EVALUATIONS DONE BY DARRIN BECKETT IN 2004. • AT THE TIME, POLE BASES DIDN’T HAVE DOCUMENTED DESIGN. • 10FT BASE • BRING THE DESIGN UP TO CURRENT CODE. • AASHTO STANDARD SPECIFICATIONS FOR STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS, LUMINAIRES AND TRAFFIC SIGNALS.

  4. HISTORY OF PROJECT • REMOVE THE NEED FOR PERFORMING SITE-SPECIFIC GEOTECHNICAL INVESTIGATIONS. • CHALLENGES • ENCOMPASS ALL TYPES OF SOIL THAT COULD BE ENCOUNTERED • CONSERVATISM

  5. HISTORY OF PROJECT • MODELED FOUNDATIONS UNDER VARYING SOIL AND SLOPE CONDITIONS. • COHESIVE AND COHESIONLESS SOILS AND ROCK • COHESION = 1 KSF • FRICTION ANGLE = 30 DEG • 3:1, 2:1, 1.5:1

  6. DRILLED SHAFT DESIGN • DIAMETER • DRIVEN BY ANCHOR BOLT CIRCLE OF POLES • 36” MAST ARM AND WIRE SPAN POLES • 48” HIGH MAST • EMBEDMENT (AASHTO 13.6.1) • BROMS DESIGN METHOD • BASED ON ULTIMATE STRENGTH DESIGN, SO SAFETY FACTORS ARE APPLIED TO SHEARS AND MOMENTS.

  7. DRILLED SHAFT DESIGN • BROMS DESIGN METHOD • SAFETY FACTORS (AASHTO RECOMMENDS) • UNDERCAPACITY FACTOR OF SOIL: 0.7 • OVERLOAD FACTOR FOR LOADINGS: 3 • SAFETY FACTOR = 4.3 • THE HIGH SAFETY FACTORS WERE AGREED ON BY THE GEOTECHNICAL DEPARTMENT DUE TO THE UNCERTAINTY OF THE TYPE OF SOIL.

  8. DRILLED SHAFT DESIGN • DESIGN TABLE DEVELOPED

  9. POLE BASE LOADS • AASHTO SECTION 3: LOADS • OUTLINES LOADING ON POLES AND ATTACHMENTS • SALSA IS USED TO FIND LOADS ON POLE BASES

  10. SALSA

  11. SALSA • ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES • MAST ARM AND HIGH MAST LOADS ARE FOUND BY SIMPLE STATICS • SPAN WIRE ANAYLSIS • DETAILED METHOD OF ANALYSIS • AASHTO A8

  12. SALSA • MAST ARM AND HIGH MAST • LOADING FOR BASE DESIGN • WIRE SPAN • LOADING FOR BASE DESIGN • LOADING FOR POLE SELECTION FROM STORAGE YARD

  13. SALSA • WIRE SPAN POLE SELECTION • PREVIOUS DESIGN • IN-HOUSE SPREADSHEET FOR WIRE SPAN STRUCTURES • NEGLECTED WIND AND ICE LOADS • SALSA • CALCULATES MOMENTS COMPARES THEM TO THE ALLOWABLE MOMENTS FOR POLES IN THE YARD.

  14. SALSA • PROBLEMS • EXCEL COMPATIBLITY • DELIVERY • LIMITATIONS

  15. FUTURE OF SALSA • MOVING TO A WEB BASED APPLICATION

  16. FUTURE OF SALSA • WEB BASED ADVANTAGES • GREATER ACCESS • FILE SHARING • UPDATES ARE SEAMLESS • MORE USER FRIENDLY

  17. FUTURE OF SALSA • POSSIBLE ADVANCEMENTS • STATEWIDE SOIL PROFILING • ADDITIONAL FEATURES • POLE BASE VOLUME CALCULATOR • ATTACHMENT HEIGHT PLACEMENT

  18. QUESTIONS???

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