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1992 PERRYGRAF FHWA Slide Rule DOT Metric & Pressure Converter Civil Engineering
1992 PERRYGRAF FHWA Slide Rule DOT Metric & Pressure Converter Civil Engineering
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A 1992 PERRYGRAF slide rule issued by the U.S. Department of Transportation’s Federal Highway Administration (FHWA), designed for temperature-pressure and metric-English conversions. Before smartphone apps, transportation engineers used tools like this FHWA slide rule for quick and precise conversions in the field.
Issued by the Federal Highway Administration (FHWA), this tool was used in transportation engineering, regulatory fieldwork, and infrastructure projects before digital calculators were widely adopted. Perfect for civil engineering historians, transportation collectors, STEM enthusiasts, and those who appreciate pre-digital measuring tools.
Very Good vintage condition with minor wear from use. Slide mechanism functions smoothly, and all conversion scales remain clear.
- Cosmetic Condition: Shows minor signs of use and slight yellowing, but no cracks or missing components.
- Functional? Yes, the slide mechanism moves smoothly, and all markings remain legible.
- Tested? Manually checked for smooth sliding and accurate scale readability.
Key Features & Details
Manufacturer: PERRYGRAF, L.A., CA
Year: 1992
Model: PG920526-96
Material: High-quality glossy paperboard
Notable Design Features:
Dual-purpose temperature and pressure converter
SI Metric-English conversion scale
Compact, durable plastic construction for field use
Official U.S. DOT and FHWA branding
Included:
1992 FHWA PERRYGRAF slide rule
Pictures are of the actual item available for purchase. Rhuckus uses safe and sustainable packaging materials. Please contact us with any questions, any time.
Issued by the Federal Highway Administration (FHWA), this tool was used in transportation engineering, regulatory fieldwork, and infrastructure projects before digital calculators were widely adopted. Perfect for civil engineering historians, transportation collectors, STEM enthusiasts, and those who appreciate pre-digital measuring tools.
Very Good vintage condition with minor wear from use. Slide mechanism functions smoothly, and all conversion scales remain clear.
- Cosmetic Condition: Shows minor signs of use and slight yellowing, but no cracks or missing components.
- Functional? Yes, the slide mechanism moves smoothly, and all markings remain legible.
- Tested? Manually checked for smooth sliding and accurate scale readability.
Key Features & Details
Manufacturer: PERRYGRAF, L.A., CA
Year: 1992
Model: PG920526-96
Material: High-quality glossy paperboard
Notable Design Features:
Dual-purpose temperature and pressure converter
SI Metric-English conversion scale
Compact, durable plastic construction for field use
Official U.S. DOT and FHWA branding
Included:
1992 FHWA PERRYGRAF slide rule
Pictures are of the actual item available for purchase. Rhuckus uses safe and sustainable packaging materials. Please contact us with any questions, any time.
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