Draft SOW tower materials ORD North ASDE.pdf

ORD North ASDE

Scope of work: ORD North ASDE structural tower materials.

Material fabrication of a seventy-seven foot tall Airport Surveillance Radar (ASR) type tower.

Consisting of six (6) ten foot sections and one (1) seventeen foot section. Tower materials to be hot dipped galvanized steel. When assembled materials shall conform to the latest EOSH and

ANSI safety requirements for stair hand railing. Including 42” guard rails, head clearances when climbing tower, stair riser and runs, toe boards, etc. Any potential sharp edges along tower walk ways are to be corrected in factory prior to the hot dip galvanizing. No field modifications, cutting, drilling or grinding to the delivered materials will not be allowed during the assembly and erection. Tower materials and pre-drilled holes as delivered to conform to current EOSH and ANSI requirements when assembled.

1. Standard 77 ft. ASR tower:

A. Field assembly drawings and instructions.

B. Fabrication and delivery for one seventy-seven foot tall ASR type tower.

C. Hot dipped galvanized steel material finish, no painting. Can galvanizing spray will not be allowed on large areas missed in the hot dipped galvanizing process.

D. Include an additional 10 % overage of hardware, nuts, bolts, etc.

E. Structural materials only, erection by others.

F. Recommended tower foundation.

G. Bolt templates

2. Scope of work for a special design and fabrication of supplied tower to adapt top of tower to accept the smaller ASDE antenna stand. (stand drawing provided)

A. Design by a structural and fabricate an “adapter” to accept the FAA antenna stand/adapter from a standard ASR platform to a modified smaller SMR mount atop the tower. As determined by the structural engineer, possibly adding wide or T-flanges to the existing tower member to meet of with the antenna stand.

B. Fabricate the additional steel (hot dipped galvanized) members to fit the SMR (radar antenna) stand/adapter on top. Stand mounting specifications per drawing number

Sensis 600-013004 sheets 1 through 4. Attached.

(cont.)

Guadalupe Gonzalez Typewritten Text

DRAFT SOW

Guadalupe Gonzalez Typewritten Text

Guadalupe Gonzalez Typewritten Text

Guadalupe Gonzalez Typewritten Text

Guadalupe Gonzalez Typewritten Text

ORD North ASDE

C. Design and fabricate additional walk way grading or non-slip plate, to fill in the openings areas due to the new smaller stand. Design must meet OSHA and ANSI for service decking.

D. Adapter deliverables: Structural Engineer Stamped fabrication drawings for FAA review and acceptance. Prior to adapter parts fabrication

E. Provide any special adapter field erection/drilling/assembly instructions.

Material delivery Location and Schedule:

A. Deliver to Chicago O’Hare International Airport North ASDE construction staging area, Wolf Road Gate #24 South of Touhy Ave. Des Plaines IL. If delivery day is pre-arranged during normal week day business hours, and delivered in an open top flatbed(s). The

FAA construction contractor will off load the bundled materials to the ground at the construction staging area.

Fabrication Schedule:

Delivery of foundation anchor bolts and double nuts and layout template 60 days after award

Delivery of bundled tower materials: 120 days after award

Delivery of special plate: 150 days after award