M00263-17-Q-0022_Amendment_0002_Q&A.docx

M00263-17-Q-0022 Amendment 0002

RFQ CONCRETE BARRIERS

QUESTIONS AND ANSWERS

1. Question: Please clarify what type brick is to be used for the concrete barriers: brick facing panels, reinforced stone panels, regular bricks or other brick-type materials?

Answer: No brick, panels, or brick type materials are to be used on the concrete barriers. (See #2)

2. Question: Can brick facing panels or similar materials be used in lieu of painting the bricks on?

Answer: No, the barriers must be solid in construction and match existing barriers. The barriers are designed to delay, deter, and prevent vehicle ramming attacks and provide stand-off to protect assets from attacks. The usage of brick facing panels or similar materials, instead of painting/staining the bricks, creates an unacceptable level of risk: there would be risks associated with the composition of the barrier (not solid concrete) and risks associated with the long term maintenance of the barrier.

3. Question: Before and after WHAT? It appears from addendum #1 that the 'before' is before colorization of the faux brick form liner and the 'after' is after adding concrete STAIN to the precast concrete piece. In other words, the barrier is NOT brick veneer over a concrete core but the barrier is solid concrete, poured with a form liner to mimic the detail of brick. After removing the forms, the brick shape is then colored with concrete stain. However, another option to EXACTLY duplicate the existing would be to pour the bottom section in normal gray concrete, then pour the center form liner section with integrally colored concrete, then pour the topsection with concrete matching the bottom section. The center section 'grout' joints are then federal specifications for traffic barriers is the monolithically poured first option, which makes this all one piece with no cold (pour) joints. An actual brick veneer would not meet specifications because in a crash the veneer detaches and basically 'explodes.'

Answer: The pictures are the “before and after” of the barrier. Specifically, the after is when stain was applied to the barrier. The MCRDPI barriers were monolithically poured, which makes the barrier a one (1) piece unit with no cold (pour) joints.

4. Question: I can't find any details on the placement of rebar in the barrier. I see the size but nothing else.

Answer: Placement of rebar must be similar to standard rebar placement in Jersey Barriers to provide reinforcement, and to prevent cracking and/or structural failure.

In the technical proposal portion of the quote, each characteristic of the barrier identified in Section B of the solicitation, which includes “The barriers must be solid concrete with rebar: 4000-PSI concrete with ½ or ¾ stone steel reinforce”, must be addressed by the quoter.

The technical proposal must contain information regarding the placement of rebar and why the method of placement was chosen by the quoter to provide reinforcement in the barrier to reduce or eliminate unacceptable cracking and/or structural failure. This information shall be used in the evaluating each quote and determining if the quoted product meets or exceeds the Government requirement as defined in Sections B and C.