__MI0131MC-RMI00663-Addendum__02_WRITE_UP.pdf

Addendum No. 2

Project: GSA McNamara Federal Building Project No: 15005.00

Date: July 14, 2017

Notice

This addendum is issued by the Architect to all known individuals, firms or corporations who have obtained or received bidding documents and contract documents for the above-listed project. This addendum is hereby made a portion of bidding documents or contract documents, as appropriate. It is issued for the purpose of amplifying, clarifying or correcting originally issued bid documents. Bidders are required to acknowledge receipt of this addendum in the appropriate space on bid form.

A R C H I T E C T U R A L

Item AD2-A1 – Revise Spec Section 012100 Allowances Refer to attached Spec Section 012110:

Allowance No. 4 has been added for the cost of carpet “CPT-1”.

Allowance No. 1 has been divided into Base bid, and Option 1 for allowance totals.

Allowance No. 2 and No. 3 are to be included in base bid only.

Allowance No. 2 has been increased to $80,000 Allowance No. 3 has been increased to $45,000 Allowance No. 5 has been added for the cost of “artwork 1 and artwork 2” noted in the finish key and schedule.

Item AD2-A2 – Floor Height General Note Refer to attached sheets AE101- AE104:

Add note to general notes on floor plans.

13. Existing floor to floor height = 12’-10”. Bottom of existing concrete beam structure above varies – Typical height is 11’-4”.

Item AD2-A3 – Selective Demolition Refer to Spec section 024119 (not attached):

Remove 1.7 B.1from spec. Demountable wall removal will not be the owner’s responsibility.

Item AD2-A4 – Concrete wall removal Refer to attached sheets AD101, AD102, and AD103:

Existing concrete and plaster wall locations to be demolished are noted in the demolition plans. These locations are at some of the main entry doors from the main core area.

Item AD2-A5 – Existing flooring to remain Break Room 1468 Refer to attached sheet AD103:

Remove the flooring demolition note for Break Room 1468.

Item AD2-A6 – Demountable Wall demolition and reinstallation Refer to attached sheets AD101, AD102, and AD103 and spec section 102219:

Add to end of demo note 7:

o Demolition to be done by the same contractor that is to reinstall. Contractor must be a certified Trendway installer and work is not to void existing warrantee.

Add To Spec section 102219 - 1.5 F o All removal, storage, repair, handling and reinstallation of the demountable walls is to be done by a Certified Trendway installer and work is not to void any existing warrantees.

Item AD2-A7 – Revise Spec Section 013110 Summary Refer to attached Spec Section 011000:

Entire schedule is replaced.

Item AD2-A8 – Fire Suppression Test results Refer to Fire Suppression Plans and specs (not attached):

The last pump test results obtained by the A/E has the following flows at 100% capacity:

Static: 286 psi Residual: 276 psi Flowing: 990 gpm

Item AD2-A9 – Demountable wall removal in earlier phases.

Refer to attached sheet AD101:

Existing sections of demountable wall construction located in Phase 3B is to removed and salvaged in earlier phases as noted. This work will take place in occupied spaces and will need to be done during unoccupied hours. These sections of demountable wall will be available for new construction in earlier phases to increase the available salvaged material that is to be relocated and reinstalled.

Item AD2-A10 – Additional information for Spec Section 084229.23 Refer to Spec Section 084229.23 (not attached):

Refer to paragraph 1.5 E - no engineer’s stamp will be required.

Item AD2-A11 – Revise Spec Section 088000 Refer to attached Spec Section 088000 (not attached):

Refer to paragraph 1.3 D - no engineer’s stamp will be required.

Item AD2-A12 – Concrete wall removal Refer to attached sheet AE104:

Provide corner guards at outside corners shown near Conference room 1442, Training room 1426, and opening 1473B.

Item AD2-A13 – Remove Fire Proofing repair note.

Refer to attached sheets AD101, AD102, and AD103:

Remove general demo note “18” from demolition plans.

Item AD2-A14 – Construction Walls – Rating Requirement Refer to GC, GI, and AE sheets (not all attached):

Refer to all notations to construction wall separations:

o All construction separation walls are to be rated one-hour.

o Remove the portion of the note that permits a non-rated separation when an

“approved” sprinkler system is in place.

Item AD2-A15 – steel angles and brackets Refer to sheet AE502 (not attached):

Refer to detail 10 on AE502 o Use Rakks EH-1818-FM fo counter brackets.

o Use ¼” x 3” x 3” steel angle wall stiffeners.

P L U M B I N G

Item AD2-P1 – Plumbing Revisions Not reissued Drawing P601:

For clarification, revise electric water heater schedule (to match plans) to indicate that location for EWH-1402 is “Break room 1434”, not “Office of the director 1457”.

M E C H A N I C A L

Item AD2-M1 – Mechanical Revisions Refer to Reissued Drawing MD103:

Temporary HVAC provisions. Revise drawings to reflect provisions to keep existing cooling/ventilation active in phase 4 construction boundary during phase 2 construction. This includes connecting flex ducts between separate existing systems and cutting and capping existing ductwork near phase 2/4 boundary as shown. The interior linear diffuser extended from phase 3 boundary will be from phase 3 temperature sensor control. The exterior diffuser control will require connecting associated duct dampers and temperature sensing to operate parallel with existing 14NW induction unit. Phasing key notes 1 thru 4 have been added and applied in this drawing. Because this work is to occur at the start of phase 2 but occurs in phase 4 construction boundary, this work needs to occur after hours and without disturbance to phase 4 occupied space.

Refer to Reissued Drawing M103:

Temporary HVAC provisions. Revise drawings to reflect provisions to provide cooling/ventilation from new phase 2 ductwork to serve phase 4 construction boundary during phase 3 construction. This includes installing VAV-14.01 and associated diffusers and temperature sensor all in temporary location shown. Once phase 4 begins, these HVAC components should be relocated to final destination (different than previously shown) on plans. Note that some increased duct sizing and reconfiguration of upstream 14NE ductwork has been applied. Ductwork installed at temporary VAV-14.01 will be temporary in nature and diffuser runouts can be routed using flex duct. New phasing key note 8 has been added and applied in drawing.

E L E C T R I C A L

Item AD1-E1 – Mechanical Schedule Revisions Refer to Re-issued Sheet M601:

Refer to Transfer Fan Schedule o Feed TF-12.1 from panel RP12B in lieu of panel RP12BB.

Item AD1-E2 – Plumbing Schedule Revisions Refer to Re-issued Sheet P601:

Refer to Electric Water Heater Schedule o Feed EWH-1201 from circuit RP12D-28 in lieu of circuit RP12DA-12.

Item AD1-E3 – Power Revisions Refer to Re-issued Sheet EP101:

Refer to Shared Conference RM 1239 o Omit redundant water heater connection.

Refer to Conference Orientation RM 1201 o Omit redundant water heater connection.

Refer to Elect. C1202 o Omit proposed panel RP12BB and associated branch breaker in panel 12B.

o Omit raceway and conductors associated with installation of panel RP12BB.

Refer to Elect. C1207 o Omit references to panel RP12DA.

o See devices fed from panel RP12D in lieu of panel RP12DA.

Refer to IDF #1 1235 o Feed equipment rack from panel RP12B in lieu of panel RP12BB.

o Provide ground bus bar according to detail 06/E501.

Refer to Office 1233 / DAV 1234 o Feed (2) receptacles from panel RP12B in lieu of panel RP12BB.

Refer to Conference RM 1239 o Feed floorbox from panel RP12B in lieu of panel RP12BB.

Refer to MOPH 1229 o Feed (5) power poles from panel RP12B in lieu of panel RP12BB.

Refer to IDF #2 1255 o Provide ground bus bar according to detail 06/E501.

Refer to Re-issued Sheet EP102:

Refer to IT RM 1322 o Provide ground bus bar according to detail 06/E501.

Refer to IDF Closet 1309 o Provide ground bus bar according to detail 06/E501.

Refer to Re-issued Sheet EP103:

Refer to Computer RM 1472 o Provide ground bus bar according to technology plans.

Refer to IDF Closet 1 1413 o Provide ground bus bar according to detail 06/E501.

Refer to IDF Closet 2 1428 o Provide ground bus bar according to detail 06/E501.

Refer to Conference RM 1442 o Omit redundant water heater connection.

Refer to Break RM 1434 o Omit redundant water heater connection.

Item AD1-E4 – Lighting Revisions Refer to Re-issued Sheet EL102:

See revised life safety fixture designations.

Refer to Re-issued Sheet EL103:

See additional life safety fixture locations.

Item AD1-E5 – Grounding Detail Revisions Refer to Re-issued Sheet E501:

See revised Ground Bus Bar Details.

Item AD1-E6 – Panel Schedule Revisions Refer to Sheets E602,E603 & E604 re-issued for clarification:

Circuits previously allocated for feeding Fire / Smoke Dampers are spare.

END OF ADDENDUM No. 2