Questions 36-40.pdf

36. Question 36. Per specifications section 21 13 13.00 10 Wet Pipe Sprinkler System, the sprinkler system is to be a wet pipe sprinkler system in all areas of the building. The elevator pit and top of shaft must be protected by the same supply pipe and must be an antifreeze filled system. Is the governments intent to have the entire fire suppression system to be an antifreeze filled system or just an anitifreeze system above the elevator pit and top of shaft? Would the government consider using a dry pipe system in lieu of the antifreeze filled system?

Answer 36: Please see design drawings, an antifreeze system is shown in the drawings and referenced in the specifications for application in the elevator pit. Elevator machinery is located in the pit. Dry pipe sprinkler systems are not preferred in this application. If the contractor can prove the dry pipe is a significant saving it can be considered. Please note the UFC requires Nitrogen Generators for all dry pipe systems.

37. Question 37. The windows specified on the project do not seem to require blast loading but the exterior doors do require blast loading requirements. Is this the government’s intention to not have blast loading requirements on the windows of the project, specifically the first floor windows?

Answer 37: The latest version of UFC 4-010-01, DoD Minimum Antiterrorism Standards, dated 12 December 2018 no longer requires door and window framing systems to be anchored to the surrounding wall systems for blast protection when the facility is within a protected perimeter fence and is a minimum distance away from said fence. The only requirement is that the glazing for ALL replacement exterior doors and windows must be blast resistant by utilizing laminated glass on the innermost pane of insulated glazing systems and to have a glazing frame bite in accordance with ASTM F 2248. Specifications Section 08 81 00 Glazing describes the types of systems required for exterior windows and doors, however, include the ASTM frame bite requirement noted above to this specification section as the section does not currently state this requirement.

38. Question 38. Sheets T-110, T-120, and T-130 show cable tray running throughout the corridors.

Sheets T-502 and T-503 show details for the cable trays as far as conduit connections and fire rated pass throughs, however there is not a sheet or a specification as to what size and type of tray are required. The specifications have a general description of both ladder and basket type cable tray, but once again a specific type or cut sheet is not available. We need to know what is specified so that we can get the right type/size of tray quoted.

Answer 37: The cable tray needs to be 12” x 2” wire basket tray designed for low voltage network cabling. The ladder runway is typical 12-inch ladder runway. We cannot specify a specific manufacturer on Federal projects so we have to keep the specifications generic.

Although, the tray and runway sizes are included on the drawings.

39. Question 39. Sheets E-601, E-620, E-630, and E-631 do not indicate the 480-120/208V 3P 4W panel MDP as being new. It does indicate that we are to re-use the existing secondary raceways and pull in new conductors as indicated on the 1-line diagram. What is not shown is the actual footage of the existing raceways. The electrical drawings refer us to sheet C-101 for a location of the existing utility transformer and the existing 800A MDP. Although both items are clearly visible, we still need to know the footage of the secondary raceways because sheet C-101 does not show us how or what path these secondary raceways are ran. Also, just want to confirm that panel MDP is existing and to remain. None of the previously mentioned E-sheets indicate that this is to be a new 800A MDP. The only new 800A panel shown is MDP-1.

Answer 39:

1. Provide a new MDP. See all demo sheets for General Note C. E-601 does state MDP

“LOCATED IN…”, this should state “LOCATE IN….”.

2. Provide secondary conductors, transformer, MDP, etc., per drawings. The existing B408

As-Builts do not indicate the existing secondary underground ducts from transformer to existing MDP. The new transformer and associated new pad will be located in the same location as the existing pad mounted transformer and the new MDP will be in the same location as the existing MDP. Estimate length based on location of transformer and MDP and add footage for ends and assume a depth.

40. Question 40. Sheets AL-110, AL120 & AL130 shows wall tags as TYPE DC, this wall is between Bedroom & Dayroom. Enlarged Standard Dorm Plans with Tags Detail B2/A-401. Show those same walls as TYPE AA. Which wall type is correct?

Answer 40: All walls between the dorm rooms and the lounge and corridors are to be type DC. The wall tag show on the ‘Enlarged Standard and ADA/ABA Dorm Plans with Wall Tags’ between the rooms and the lounge noted as type AA is incorrect.