50013-BTB2859-1.pdf

PDF 1 MB Posted May 19, 2025

Attached to: CHEMICAL SCIENCE ANNEX FUME HOOD CONTROLS REPLAC - addendum 2
Solicitation number: 50013-BTB2859
Issued by: Orleans Parish, New Orleans City, Louisiana

About this file

Written by GovTribe AI · May 26, 2025

This document is an Addendum (Number 1) issued by Crumb Engineering, LLC for the Fume Hood Controls Replacement – Phase I project at the Chemical Science Building of the University of New Orleans. The addendum, dated May 19, 2025, provides critical clarifications for the project, including requirements for fume hood exhaust ductwork (304 stainless steel, minimum 18 gauge with fully welded joints), integration with existing building control systems, and work scheduling constraints. A non-mandatory pre-bid conference was held on May 13, 2025, and the addendum includes specific instructions about connecting to existing JCI Jace controllers, updating control graphics, and coordinating work across 4-6 available labs at a time.

The addendum includes technical specifications and prior approvals for manufacturers, with Accutrol specifically approved for lab exhaust controls. The document indicates that the project involves removing pneumatic tubing, replacing existing fume hood monitors, sensors, and temperature controls, and providing new system controllers and integration modules. The new work in certain labs is to be included as Alternate #1 on the Bid Form. Contractors are advised that they must demonstrate their equipment meets or exceeds specification requirements, fits available space, and has the necessary capacity and performance characteristics. The addendum is part of the comprehensive bid documents and takes precedence over previous documentation, requiring bidders to adjust their proposals accordingly.

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File	Type	Posted
50013-BTB2859-3.pdf	PDF	May 19, 2025
50013-BTB2859.pdf	PDF	Apr 29, 2025

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Crumb Engineering, LLC

4609 Fairfield Street (504) 455-4450 Metairie, LA 70006 Fax (504) 455-4451

ADDENDUM NUMBER 1 May 19, 2025

Fume Hood Controls Replacement – Phase I Chemical Science Building University of New Orleans Project No. 01-107-24-05, F.01004601

NOTICE TO BIDDERS:

This addendum, which consists of 6 pages, shall be considered part of the Bid Documents for the above-mentioned project as though it had been issued at the same time and incorporated integrally therewith. Where provisions of the following supplementary data differ from those of the original Bid Documents, this addendum shall govern and take precedence.

Bidders are hereby notified that they shall make any necessary adjustments to their Bid on account of this addendum. It will be construed that each bidder’s proposal is submitted with full knowledge of all modifications and supplemental data specified herein.

Attention is called to this:

1. Clarifications:

a. Any modifications to the fume hood exhaust ductwork shall be made with 304 stainless steel, minimum 18 gauge with fully welded joints and seems.

b. There is an existing JCI Jace controller in the 2nd floor mechanical room dedicated to the fume hood exhaust system. The new control system shall connect to the existing Jace or at Contractor’s option a new Jace may be provided. The Contractor shall integrate new controllers into the existing JCI building control system.

c. The control graphics shall be updated for the new control system.

d. 4-6 labs will be available at a time for the Work. Contractor shall schedule the Work based on this and coordinate the work schedule with the Owner.

e. The existing lab control valves are pneumatic. Remove all pneumatic tubing back to the main control air source and cap so that remaining labs and controls will function properly.

f. See attached Sheet ME1 with revisions clouded. The new work in labs shown with revision cloud on this sheet shall be included on the Bid Form as Alternate #1.

2. A non-mandatory pre-bid was held on May 13, 2025 at 10:00AM. Attached are the Pre-Bid sign In Sheets.

3. Prior Approvals:

Listed below are manufacturers who are recognized as capable of producing products or equipment equal to those specified. Products or equipment will be considered acceptable, providing the equipment meets, or exceeds the specification requirements, fits the available space, and has the capacity and performance requirements.

The listed (prior-approved) equipment are not given with respect to any specific model, series, catalog number, etc. Suppliers are cautioned that before their equipment is actually approved, it will be incumbent upon them to demonstrate to the architect or engineer, that the product or equipment is (in fact) equal to the requirements specified and conforms fully to all specification requirements.

Section 15950 Temperature Controls:

Approved manufacturers

Lab exhaust controls - Accutrol

End of Addendum No. 1

SPECIFIC NOTES THIS SHEET:

EXISTING FUME HOOD. REMOVE AND REPLACE EXISTING FUME HOOD MONITOR, SASH SENSOR AND

ZONE PRESENCE SENSOR.

REMOVE AND REPLACE LAB TEMPERATURE SENSOR AND DUCT MOUNTED TEMPERATURE SENSOR.

PROVIDE NEW FUME HOOD SYSTEM CONTROLLER AND INTEGRATION MODULE. SEE 15950. PROVIDE

120V CIRCUIT FROM EXISTING 120V PANEL.

LOCATION OF EXISTING 120V PANEL. PROVIDE 120V, 20A, 1P BREAKER FOR CONTROLS.

REMOVE AND REPLACE GENERAL EXHAUST VALVE. CONNECT TO EXISTING DUCTWORK.

REMOVE AND REPLACE FUMEHOOD EXHAUST VALVE. CONNECT TO EXISTING DUCTWORK.

REMOVE AND REPLACE SUPPLY AIR VALVE. CONNECT TO EXISTING PIPING AND DUCTWORK.

WHILE SUPPLY AIR VALVE IS REMOVED, CLEAN EXISTING HEATING COIL AND REPLACE HEATING COIL

VALVE ACTUATOR.

1111 1

111111 1 1 11

1 1 11 1 1 1

1 1 11 111

LAB TYPE A

GENERAL NOTES THIS SHEET:

1. EXISTING HVAC SHOWN DASHED.

2. SEE SECTION 15950 FOR FUME HOOD CONTROL SYSTEM REQUIREMENTS.

3. VERIFY EXISTING CONTROLS AND VALVES IN FIELD.

4. SEE SHEET ME2 FOR SUPPLY AND EXHAUST VALVE DESIGN PARAMETERS.

666 66 66 6

LAB TYPE ALAB TYPE ALAB TYPE A

7 7 77

6 6 6 66 6 6 6

LAB TYPE A

5 5 5 5

666 66 66 6

7 7 77

2 2 2 2

LAB TYPE ALAB TYPE A LAB TYPE ALAB TYPE ALAB TYPE ALAB TYPE ALAB TYPE A

6 6 6 66 6 6 6

5 5 5 5

6 6

LAB TYPE A

8 8

88 88

8 8

1 1 1

7 8 7 8 7 8 7 8

5 5 55

66 66

LAB TYPE FLAB TYPE C LAB TYPE F LAB TYPE C

1 1

6 6

7 8

6 6 6

5 5

LAB TYPE D

LAB TYPE A LAB TYPE A

2 2

NOTE:

ALL NEW LABS ADDED IN THIS ADDENDUM

SHALL BE INCLUDED IN ALTERNATE #1.

These drawings are the property of the designer and are not to be reproduced in whole or in part. They are only to be used for the project and site specifically identified herein

Scales stated hereon are valid on the original drawings only. Contractor shall carefully review all dimensions and conditions shown and report to the engineer any errors, inconsistencies, or omissions discovered.

These plans were prepared in this office under our personal supervision, and to the best of our knowledge comply with state and local codes. We will generally administer construction.

23 JAN. 2025

sheet date revisions

N ew

O rle an s, Lo ui sia na

La ke fro nt C am pu s fu m e ho od c on tro ls re pl ac m en t

Un ive rs ity o f N ew O rle an s ch em ic al sc ie nc e an ne x

ME1

5/15/25 1 Addendum #1

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INORGANIC LAB

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412 SF

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403 SF

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391 SF

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HVAC

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410 SF

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391 SF

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387 SF

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FACULTY OFFICE

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267 SF

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FACULTY OFFICE

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263 SF

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PHYSICAL LAB 'A'

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414 SF

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TELE.

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69 SF

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391 SF

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391 SF

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ANTE

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STAIR #2

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STAIR #1

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JANITOR

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AutoCAD SHX Text 4609 Fairfield Street Metairie, La 70006

AutoCAD SHX Text P-504.455.4450 jcrumb@crumbengineering.com

AutoCAD SHX Text Crumb Engineering, LLC

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ME1

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ME1

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3RD FLOOR PLAN - MECHANICAL & ELECTRICAL

File details come from the government source that posted it. Updated May 26, 2025.