Slide Rule/Wheel Calculators

Slide Rule/Wheel Calculators
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  1. S-2 Walker's Self Computing Lumber Scale
    S-2 Walker's Self Computing Lumber Scale
    Special Price $6.25 Regular Price $6.95
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  2. Scheduling Wheel Chart
    Scheduling Wheel Chart
    Special Price $7.15 Regular Price $7.95
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  3. 2021 Natural Gas Pipe Sizing Calculator, IAPMO
    2021 Natural Gas Pipe Sizing Calculator, IAPMO
    Special Price $17.95 Regular Price $19.95
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  4. 2018 Natural Gas Pipe Sizing Calculator, IAPMO
    2018 Natural Gas Pipe Sizing Calculator, IAPMO
    Special Price $17.95 Regular Price $19.95
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  5. Duct Design Calculator Wheel
    Duct Design Calculator Wheel
    Special Price $7.15 Regular Price $7.95
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  6. DUCT CALCULATOR SLIDE RULE
    DUCT CALCULATOR SLIDE RULE
    Special Price $35.95 Regular Price $39.95
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  7. SMACNA Duct System Calculator
    SMACNA Duct System Calculator
    Special Price $53.95 Regular Price $59.95
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