Concrete Chimneys

• One 320’ high tapered jumpform concrete chimney with an acid resistant concrete liner.
  • Mat foundation
  • Refractory liner

• One 350’ high jumpform concrete chimney.
  • 316L stainless steel liner
  • Testing platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb
• One 350’ high jumpform concrete chimney.
• • COR-TEN liner
  • Testing platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb

• One 198’ high jumpform concrete chimney.

  • Five (5) steel liners. (two (2) 316L stainless steel liners and three (3) carbon steel liners)
  • Testing platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb

  Hoffmann also constructed on site:

  • One 30’ dia. x 77’ high slipform concrete silo for clay storage.
  • One 36’ dia. x 116’ high slipform concrete silos for clay storage.

• One 180’ high plumb jumpform concrete chimney.

  • Dual wall
  • Partial test platform
  • Full-height ladder with SAF-T-Climb

  Hoffmann also constructed on site:

  • Two 34’ dia. x 84’ high jumpform coal silos and one 16’ dia. x 72’ high jumpform ash silo.

• Two 387’ high x 24’ dia. plumb jumpform concrete chimneys with one 400’ high x 10’3” dia.

  COR-TEN liner.

  • Test platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb
  • 900 lb personnel elevator

• One 225’ high plumb jumpform concrete chimney with two 7’6” insulated steel liners.

  Hoffmann also constructed on site:

  • One 30’ dia. X 100’ jumpform limestone silo with three outlets in the mass flow, stainless steel hopper.

• One 200’ high heat recovery steam generation plumb jumpform concrete chimney with three 15’2” Insulated steel liners.
• One 200’ high supplementary process steam generation plumb jumpform concrete chimney with two 4’11” insulated steel liners.

Both chimneys were constructed with:

• • Mat foundations
  • Test platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb

• One 388’ high x 30’ dia. plumb jumpform concrete chimney.

  • FRP liner
  • Test platform
  • Lighting platform
  • Full-height ladder with SAF-T-Climb
  • Personnel elevator

• One 208’ high Plumb Jumpform Concrete Chimney with 12’0” Liner of Castible Acid Resistant Concrete.

  Hoffmann also constructed on site:

  • Two 40’ dia x 84’ high Jumpform Concrete Silos Storing Wood

Hoffmann provides comprehensive design and engineering with silo; based on soils report.

• Spread Foundations
• Ring Beams
• Mat Foundations

Ladders, platforms, and winding staircases offer a form of egress and ease in access to equipment. Hoffmann provides custom design, fabrication, and installation. These components can be fabricated from stainless steel, aluminum, or carbon steel with a galvanized or painted finish.

• Caged Ladders
• Ladder with SAF-T-Climb

Hoffmann chimney cap designs are based on the chemical makeup of the flue gas.

The flue gas flow rates determine the outlet size.

Hoffmann’s chimney or stack design is based on the NFPA780 standard for Installation and the National Electrical Code.

Additionally, Hoffmann can provide aviation lighting and follows the FAA set guidelines for obstruction lighting (FAA Circular AC 707460-1K Obstruction Marking Lighting) on concrete chimneys and steel stacks.