MODIFICATION
66 -- Carbon Fiber Beam and Support Structure
- Notice Date
- 9/9/2005
- Notice Type
- Modification
- NAICS
- 334516
— Analytical Laboratory Instrument Manufacturing
- Contracting Office
- Department of Commerce, National Institute of Standards and Technology (NIST), Acquisition Management Division, 100 Bureau Drive, Building 301, Room B129, Mail Stop 1640, Gaithersburg, MD, 20899-1640
- ZIP Code
- 20899-1640
- Solicitation Number
- SB1341-05-Q-1043
- Response Due
- 9/12/2005
- Archive Date
- 9/27/2005
- Point of Contact
- Carol Wood, Contract Specialist, Phone 301-975-8172, Fax 301-975-8884, - Patrick Staines, Contract Specialist, Phone (301)975-6335, Fax (301)975-8884,
- E-Mail Address
-
carol.wood@nist.gov, Patrick.Staines@nist.gov
- Description
- The above referenced solicitation is hereby amended to respond to technical questions submitted with respect to the Carbon Fiber Beam. The Carbon Fiber Beam is a beam made of carbon fiber that has the dimensions described in the body of the solicitation. The due date for quotations remains unchanged. QUESTION 1: Line Item 0001 - Carbon Fiber Beam Paragraph 1(d) - Mounting holes along neutral axis and positioned at airy points. - Please define what is meant by airy points. RESPONSE: The Airy points are points that you support a gage block or other length artifact when you are measuring them. These points are unique in that a beam supported at these points will have minimum elongation in the measurement direction. This is a standard metrology term. The specific points are determined by the loading and the length of the beam. The vendor should look up the term and calculate the appropriate position of the support points given the length of their proposed beam. QUESTION: Paragraph 1(e) - Sealed ends - Please define what is meant by "sealed"? RESPONSE: Carbon fiber has very poor hygroscopic properties. That is when the relative humidity in the surrounding environment changes the length, shape and size of objects made from this material changes as well. Metrology system manufacturers who make artifacts and machine components from these materials have developed a process referred to as "sealing" which eliminates the ability of the material to absorb water at the ends of the fibers. That is to say, they coat the end of the fiber so that they cannot absorb water and do not distort as a function of the change in relative humidity. QUESTION: Paragraph 2 - What discreet inclinations are preferred? RESPONSE: Discreet means that they may have a push pin or other mechanical locking mechanism which will allow the bar to be inclined at certain positions, say for instance 0, 22.5, 45, 67.5 and 90 degrees (angle the long axis of the beam makes with the ground). Other systems may simply clamp the beam along its side so that the beam can be positioned in any arbitrary incline angle. Both options are acceptable as long as the beam can be supported at 0, 45 and 90 degrees. QUESTION: What is the intended operating environment for the beam? RESPONSE: 20-90 percent relative humidity 740-780 mmHG 15-25 degrees Celsius QUESTION: Would the government ever desire to transport beam to other locations? RESPONSE: Yes QUESTION: What would be the method of transport? RESPONSE: Ship in transport case. QUESTION: Does the government require reusable shipping containers for the Carbon Fiber beam and support tripods? RESPONSE: No
- Place of Performance
- Address: Contractor's Site
- Record
- SN00891131-W 20050911/050909211822 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
(may not be valid after Archive Date)
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