DESIGN CRITERIA: Specifications set forth by the American Institute of Steel Construction (AISC) are utilized as a minimum.

WELDING CODE: Specifications set forth by the American Welding Society (AWS) D1.1. are utilized.

QUALITY CRITERIA: Specifications set forth by the American Institute of Steel Construction (AISC) are utilized.

INSPECTION: During the manufacture of each PEMCO mast, continual inspections occur.

 

Each inspection is performed by a minimum of four of the following:

• Engineering Department Quality Control Inspector

• Sales Independent Inspector

• Fabrication Foreman Plant Supervisor

• Paint Shop Foreman 

 

PEMCO FABRICATION INSPECTIONS:

 

Mast Record Sheets

• Correct production drawings

• Correct grade, quality of material

• Record mill test reports & heat numbers of material

 

Mast Shop Check List:

• Check dimensions per drawings

• Square is 90° & Straight is 1/8” over 100 feet

• Saw cut material, 90% of the mast is assembled with saw cut material to assure proper fit

• Gauge of each section

 

Mast Check List:

• Items as per Record Sheet

• Hydraulic System

• Latch Mechanism

• Stabilizer – Scope Cylinder

• Tubing Board

• Rod Board

• Crown – Sheaves

• Base

• Paint

• Miscellaneous

 

Independent Inspection:

• X-Ray – ASME VIII main leg splices

• Magnetic Particle Inspection

 

Paint Work:

• All pieces are sand blasted to SP-10

• All pieces are primed with a zinc rich epoxy – ester primer (standard) or as specified by customer

• All pieces are top coated with Dupont Imron, PPG Del Fleet or as specified by customer

• Inspection of each coating is performed via mill gauge and visual

 

Final Assembly:

• All components are assembled

• All bearings and friction areas greased

• Wire rope installed (Bridon American)

• Paint touch up

• Check list performed

Records:

• File kept per serial number

• Customer and Purchase Order

• Mast Record Sheet

• Independent Inspections

• Materials Record

• List of Workmen

• Notes  (Order & Fabrication Changes, Shipping)

• Installation item list

• Photographic Record

Material Storage:

• All materials are stored indoors