QandA W50S6V-20-B-0001 20JUL20.pdf

QUESTIONS AND ANSWERS FOR SOLICITATION W50S6V-20-B-0001

COANG-Space Control Facility

Project No. TDKA 16-9004 20 July 2020

Date: 20 July 2020

Question 1: Exterior door 121B enters into access flooring area. The concrete floor is 2 feet below finish floor. Should there be a concrete beam or cap at sill of door in masonry wall?

Answer 1:

The CMU masonry foundation wall is grout solid from top of footings to finished floor elevation, with additional reinforced cells grout solid. A concrete beam across door threshold should not be necessary, but we recommend full depth threshold cover plate extending across to access flooring.

Question 2: Is reference to note 13 on S-101 intended to reference general note M for future blockout? Will there be ACM reveals coordinated with this future block out? There are not any references to future block out on Architectural sheets.

Answer 2:

YES. Sheet S-101 Floor Plan to indicate see General Note M, in lieu of see Note 13. The ACM does not require reveals for future block out. Addendum 1 pending.

Question 3: Sheet A-402 Keynote 18 indicates Steel Ladder. Detail C6 indicates MFGR Aluminum ladder. Which is correct?

Answer 3:

A-402 Keynote 18 to indicate ‘ALUMINUM LADDER TO ROOF SCUTTLE/HATCH’, in lieu of steel ladder. Addendum 1 pending.

Question 4: Sheet A-502 Wall Sections detail E6 is indicating Keynote 24 – modified bitumen roof membrane on parapet wall as appears to top of wall. Should this detail indicate modified bitumen roof membrane up wall a minimum of 8” with elastomeric coating on CMU to top of parapet wall as is required for all exposed CMU?

Answer 4:

YES. A-502 Keynote 24 to indicate ‘MODIFIED BITUMEN ROOF MEMBRANE UP WALL A

MINIMUM OF 8” WITH ELASTOMERIC COATING ON CMU TO TOP OF PARAPET WALL AS

IS REQUIRED FOR ALL EXPOSED CMU.’ Addendum 1 Pending.

Question 5: Specifications include section 034500 Precast Architectural Concrete. We are not finding the location for precast concrete sills. The sills below windows in brick veneer are shown as brick rowlock. Are there other locations that require precast concrete sills?

Answer 5:

NO. Omit Specification Section 034500 Precast Architectural Concrete.

Precast Window Sills were included in the project prior to changing to ACM Exterior Finish, and this section should have been removed. Addendum 1 pending.

Question 6: Sheet A-101 Floor Plan wall section E6 has note 4 (2 ½” steel studs) and note 41 (2 ½” rigid board insulation) on inside of wall. This conflicts with referenced typical detail A6/A-521 on section E6. A6/A-521 indicates 2 ½” steel studs with fiberglass batt insulation. Is A6/A-521 correct and is this typical condition on all masonry walls around admin area?

Answer 6:

The portion of wall with brick veneer requires a continuous insulation (R-11.5 minimum).

Due to the percentage of CMU cells grout solid, the foamed insulation will not provide the continuous thermal barrier required, and fiberglass insulation can’t provide with that minimum thickness. Provide rigid board insulation for the portion of wall with brick veneer. The portion of walls with ACM have continuous rigid insulation at part of their system, and the use of fiberglass for the balance of the exterior walls surrounding the Administration Areas and Operations Areas will provide adequate minimum continuous insulation.

Question 7: Sheet A-521 Exterior Details, D3 Storefront sill- ACM Panels. Should this detail indicate simulated stone stool typical for storefront windows?

Answer 7:

YES. Detail D3/A-521, to include note ‘solid surface window stool’ at the inside of storefront windows in lieu of illustrating a gypsum board return. Addendum 1 pending.

Question 8: Sheet A-521 Exterior Details, G3 Storefront Jamb -ACM Panels indicates 12” CMU. Should this indicate 8” CMU as there are not any storefront in 12” CMU walls?

Answer 8:

YES. Detail G3/A-521 to indicate 8” CMU in lieu of 12” as shown, and change the plan south dimension leader to face of CMU in lieu of to outside face of wall as shown. Addendum 1 pending.

Question 9: Sheet A503 Wall Sections, A6 Wall Sect. – Maint. @ O.H. Door has keynote 38 ACM Panel Insulation. This wall does not have ACM Panels. Should this note be removed?

Answer 9:

YES. Delete keynote #38, reference to ACM, on detail A6/A-503 The ACM was included on a previous iteration, but is no longer included on the referenced wall.

Question 10: Sheet A702 Partition Types, wall type 9 indicates 3 5/8” 20 GA Steel Studs @ 16” O.C. (2) layers 5/8” gyp board each side and abuse resistant gypsum board on uncontrolled area side. Should this partition type include (2) layers 5/8” gyp board required on uncontrolled area side.

Answer 10:

Detail (Partition Type 9) on sheet A-702 to indicate 2-layers 5/8” gypsum board one side (Controlled Area) and 1-layer abuse resistant gypsum board opposite side (Uncontrolled Area), in lieu of 2-layers gypsum board each side. Omit reference to ‘each side’.

Question 11: Item 3 below says must use JCI Metasys for EMCS & DDC. There are multiple manufacturers with less proprietary functionality that can meet the needs of the air force and the mission of this facility. Likely at a more preferable price point for the government while meeting the demands of cybersecurity. Will the government be will to adjust for this?

Answer 11:

A single controls vendor on Peterson AFB allows for simplified and reduced training costs for our end users, reduced maintenance costs over the lifecycle of the building, reduced cost of spare parts and service maintenance contract costs, and in the event of a system failure reduced downtime for the unit. Johnson Controls Metasys will remain a brand name specific product.