California Department of Transportation
 

Contract 05-0N2504

The responses to bidder's inquiries, unless incorporated into a formal addendem to the contract, are not a part of the contract and are provided for the bidder's convenience only. In some instances, the question and answer may represent a summary of the matters discussed rather than a word-for-word recitation. The availability or use of information provided in the responses to bidder's inquiries is not to be construed in any way as a waiver of the provisions of Section 2-1.03 of the Standard Specifications or any other provision of the contract, the plans, Standard Specifications or Special Provisions, nor to excuse the contractor from full compliance with those contract requirements. Bidders are cautioned that subsequent responses or contract addenda may affect or vary a response previously given.


Q1) Special provisions page 79 describes the enclosure as fabricated from 0.125” galvanized steel. This is an unusually thick enclosure wall, and this dimension usually applies to aluminum cabinets. The enclosures are 24” x 24” x 12” and pole mounted with stainless steel banding. The weight of the enclosures with 0.125” thick steel walls will be heavy for banding to a pole. In view of this weight, did you intend to have the cabinets constructed of 0.125” thick aluminum?

A1) No. Please bid per contract documents. 10Mar10


Q2) Special provisions page 72 references IEEE Standard 587-1980 Category C for surge protection. This IEEE specification dates from 1980, and was superseded by the IEEE in 1991, and again in 2002. Please provide a specification for surge protection that is currently accepted engineering practice, such as IEEE Standard C62.41.2, EN 61000-4-5, or IEC 1000-4-5.

A2) Please refer to Addendum No. 2 dated March 8, 2010.10Mar10


Q3) Special provisions page 72 describes DIN rail mounted surge protection devices for DC power and RS232/RS485 communications signals. MVDS products should include surge protection internally, if they were built for the traffic industry. The special provisions and drawings appear to be a sole source specification for a specific vendor’s product, and that product was not designed to meet the requirements of the traffic industry. Will you accept an MVDS product which has internal surge protection meeting or exceeding IEEE Standard C62.41.2, or EN 61000-4-5, or IEC 1000-4-5?

A3) Please refer to Addendum No. 2 dated March 8, 2010. 10Mar10


Q4) Special provisions page 72 describes a “Serial to Bluetooth Radio” as a DIN rail mounted device. Drawings E16 and E17 show a DIN rail mounted Serial to Bluetooth radio. This is a retrofit of Bluetooth communications to an outdated MVDS product. Modern products incorporate Bluetooth communications internally since it requires just one integrated circuit chip in the product. The special provisions and drawings E16 and E17 appear to be a sole source specification for a specific vendor’s product, and that product is outdated and probably obsolete. Will you accept an MVDS product with Bluetooth communications internal to the product?

A4) Please refer to Addendum No. 2 dated March 8, 2010. 10Mar10