Answers_to_Questions.docx

Answers to Questions

1. This is a request for clarification of the bid document specification’s sections 07 12 00, and 07 13 53. These sections specify many different types of water proofing. Please clarify the application relationship between these two specification sections with regards to Bid Item #0009 Install Magazine Waterproofing.

Answer:

Item #0009 is install magazine waterproofing system. Detail 3 on sheet C3.0 shows how to do this. Spec sections 07 13 53 and 07 12 00 define the requirements of the materials that are used detail 3.

2. Spec. sectections 07 12 00, & 07 13 53 specify four different types of water proofing systems. All of which are to be attached to clean and prepared concrete surface with a back fill protection board attached. The plans are asking for one system from spec.section 07 12 00, and one system from spec. section 07 13 53 be applied in no certain order. How is this to be achieved?

Answer:

1. Prepare the magazine vault exterior surface as described on Plate C20, Demolition Notes and Section 07 12 00.3.2.A.

2. Apply Elastomeric Sheet Waterproofing according to manufacturer's printed installation instructions per Sections 07 13 53.3.3. through 3.6.

3. Apply Built-up Bituminous Waterproofing per Sections 07 12 00.3.3 and 3.4.A. Water test described in 3.4.B is not required.

4. Apply protective covering prior to backfilling per Section 07 12 00.3.5. Protective covering may consist of fiberboard or other suitable protective covering as submitted by the Contractor and approved by the Contracting Officer.