Large Binocular Telescope Project

Questions & Answers

concerning the RFP for the

Enclosure Cranes

August 20, 1997

Question 1. (received 11 August 1997)
What is the length of the runways for the upper (rotating building) crane for the travel of the main bridge?

Answer 1. The length of main rails for the upper crane is 101 feet (not accurate for construction - only for estimating purposes). The main runway for the lower crane is 84 feet long.

While answering the question, we have realized that there was an omission in the drawings that were distributed with the Request for Proposals. The missing drawing is the ninth level plan; b210m010.dwg. A revised list of reference drawings for the Statement of Work is shown below.

3.2 Reference Drawings and Documents

Document
Type 		Drawing
CAN # 		Revision
Date 		Assembly / Part Name
Autocad Drawing 320a003c.dwg 08 Feb 1997 Rotating Building 60t (35t + 35t) Crane,
Parking Position Obscuration
Autocad Drawing 250a006b.dwg 05 Mar 1997 General Assembly,
Crane Obstruction
Autocad Drawing 213m003a.dwg 20 Mar 1997 Fixed Enclosure
Third Level Plan
Autocad Drawing 213m010a.dwg 20 Mar 1997 Fixed Enclosure
Wall Sections
Autocad Drawing b210m010.dwg 16 Sep 1996 Ninth Level Plan
Autocad Drawing b210m016.dwg 21 Oct 1996 Building Section C-C
Autocad Drawing b210m020.dwg 21 Oct 1996 Wall Section Details
Reference 001s006c.htm 02 Jun 1997 LBT Drawing Standards

Question 2. (received 15 August 1997)
What is the elevation above sea level of the LBT site? And what is the range of ambient temperature for operation of the equipment?

Answer 2. The cranes for the upper Rotating Enclosure and the lower Annex Building are installed at altitudes of 10616 and 10508 feet respectively (3236 and 3203 meters) above sea level. We have adopted the following environmental conditions for operation and storage of the telescope equipment:

Question 3. (received August 20, 1997, regarding proposal deadline)
Could the proposal deadline be extended by a few days? We are having problems related to delivery of some computer parts through UPS.

Answer 3. Yes, due to the general disruption of package and courier delivery by the UPS strike, we will agree to extend the proposal deadline for the proposals regarding Enclosure Cranes by four days. The new deadline will be August 26, 1997.