Structural Condition Assessment - Connecticut...F:\P2014\1194\K10\Deliverables\Report\RemGrit Bldgs...

$: Structural Condition Assessment - Connecticut...F:\P2014\1194\K10\Deliverables\Report\RemGrit Bldgs 345 & 724 - Structure Assessment Report.docx 2 2 Observations 2.1 Building 345 2.1.1$
Project No. 20141194.K10

Structural Condition Assessment

RemGrit Facility

Buildings 345 & 724 889 Barnum Avenue

Bridgeport, Connecticut

June 2018

56 Quarry Road

Trumbull, CT 06611

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Table of Contents

Structural Condition Assessment

Buildings 345 and 724

889 Barnum Ave, Bridgeport, CT

1 Introduction ................................................................................ 1

1.1 Executive Summary............................................................................................... 1

1.2 Scope of Services ................................................................................................... 1

2 Observations .............................................................................. 2

2.1 Building 345 ........................................................................................................... 2

2.1.1 Building Description .................................................................................................... 2

2.1.2 Observations .................................................................................................................. 2

2.1.3 Discussion and Conclusions ....................................................................................... 3

2.2 Building 724 ........................................................................................................... 4

2.2.1 Building Description .................................................................................................... 4

2.2.2 Observations .................................................................................................................. 4

2.2.3 Discussion and Conclusions ....................................................................................... 4

Appendices

Appendix A Photos – Building 345 Appendix B Photos – Building 724 Appendix C Building Plan

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1 Introduction

Fuss & O’Neill, Inc. (F&O) was retained by the City of Bridgeport to perform structural condition

assessments of two abandoned buildings at the RemGrit site at 889 Barnum Avenue: Buildings 345 and

724. These two buildings were assumed to be demolished and therefore omitted from a previous study

of all the structures at the site, performed by Simpson Gumpertz & Heger in July of 2016. The purpose

of this condition assessment is to develop a general understanding of the current condition of these two

building structures and identify damage, deterioration or other issues that may impact the potential

redevelopment of the buildings.

1.1 Executive Summary

The purpose of this Condition Assessment was to observe and report on the physical condition of

Buildings 345 and 724 and discuss the impact of these conditions on the potential renovation and reuse

of the structures.

From our visual inspection, along with measurements and spot inspection of building elements, we

determined that although essentially all interior finishes, as well as a portion of the roof and walls of

Building 345 and most of the roof deck at Building 724, have been destroyed, most of the remaining

structures of both buildings are intact and have potential for renovation and reuse. Generally, despite

damage due to adjacent demolition and exposure to weather and vandalism, primary roof and wall

structures are in fair to good condition. There are localized areas where both roofs and walls have been

severely damaged and will require reconstruction, but most can be reused with minor structural and

cosmetic repairs. Building envelopes (roofing, roof decks and exterior walls) will require significant

repair and/or replacement.

1.2 Scope of Services

This Condition Assessment consisted of visual inspections of Buildings 345 and 724 only at the

RemGrit site, including roof and mezzanine structures, exterior walls and any miscellaneous interior

structures. The assessment was limited to evaluating the structural integrity of the referenced buildings

and did not include an evaluation of architectural, MEP and non-structural building or site elements, nor

did it include a Code review of the buildings, site or inspected elements.

Photographs of typical conditions and conditions requiring remedial action have been included in

Appendix A and Appendix B.


2 Observations

2.1 Building 345

2.1.1 Building Description

Building 345 is a single story, rectangular structure with a gable roof featuring a raised trapezoidal

monitor in the center. The roof and monitor are supported by a series of transverse steel trusses spaced

at 16 feet on center that span across the short dimension of the building (see photo #A-1). The trusses

are supported on concrete masonry piers along the exterior walls in the long direction (see photo #A-2).

Longitudinal trusses also run in the long direction of the building, spanning between the transverse

trusses to carry the monitor walls and roof above. The monitor appears to have had glass on the sloping

surfaces, which have been covered with asphalt shingles. The flat portions of the roof appear to be

supported on metal deck with concrete fill, carried by purlins spanning between the trusses.

The exterior walls of the building consist of a combination of concrete masonry and brick walls. The

walls appear to be solid, with no insulation or cavity. A brick exterior wall at the center of the south wall

appears to have been part of a pre-existing building that has been demolished. An interior wall near the

center of the building separates the building into two separate open rooms. Building 724 is situated

immediately to the north of the east half of the building.

The floor of the building appears to be a conventional slab on grade, with several small pits and

openings found. There is a wood framed mezzanine at the east end of the west section of the building,

with a small steel framed platform suspended from a roof truss at the west end (see photo #A-3).

Two bays at the east end of the building, including the exterior walls, roof deck and roof framing, were

destroyed during demolition of the adjacent buildings (see photo #A-4).

Specific observations and recommendations for this building are noted below.

2.1.2 Observations

1. Demolition debris, including bricks, has fallen onto and through the roof along the south wall near

the center of the building. Some bricks remain tenuously perched on the roof trusses in this area

(see photos #A-5 and A-6).

2. An independent support framework for bridge cranes runs through the center of the west portion

of the building. The crane girders are supported on a grid of columns that is staggered between the

building columns that run the length of the building, and fill most of the southern half of the

western portion (see photo #A-7). The crane framing does not support or brace the roof

structure.

3. Most of the roof trusses and columns have surface rust due to exposure to the elements, but

distress, excessive deflection or severe section loss were not found (see photo #A-8).


4. Significant deterioration of roof decking was found throughout the building, exacerbated in many

cases by materials falling through the roof during adjacent demolition activities (see photo #A-9).

A large percentage of roof deck will require replacement.

5. Most of the original monitor has been roofed over with asphalt shingles, and the roofing has failed

at much of the flat roof adjacent to the monitors (see photo #A-10).

6. Glazing remains at most of the remaining monitor on the east end of the building, but most has

been damaged or removed (see photo #A-11).

7. Interior finishes and partitions have been destroyed by vandalism and weather exposure. (see photo

#A-12).

8. The central interior CMU wall across the width of the building has several stepped cracks and

deteriorated mortar joints (see photo #A-13). The stepped cracks appear to emanate from

locations where the wall is penetrated by longitudinal roof trusses that support the monitor and

brace the transverse trusses.

9. Damage was noted at several isolated sections of the exterior walls, particularly on the south side,

where adjacent structures have been demolished (see photo #A-14).

2.1.3 Discussion and Conclusions

Building 345 has undergone severe damage due to material impact from adjacent demolition, vandalism

and weather exposure, including rain, snow, wind and multiple freeze-thaw cycles. Nevertheless, other

than the east end of the building, roof decking and isolated sections of exterior walls noted above, the

main building structure remains intact.

The building does provide an open floor plan in both the east and west sections, with potential for

natural lighting through existing and new punched wall openings and/or restoration of glazing at the

central monitor. The crane system at the west portion of the building can be removed to provide

column free interior space in that area. Existing interior partitions are severely damaged and cannot be

salvaged. The steel framed mezzanine appears to be intact, but can be demolished without any impact

to the building structure.

The building would likely require complete reroofing. Exterior walls are uninsulated, with variations in

materials and isolated damage, so some wall restoration is needed, in addition to new insulation. This

can be applied to either the interior or exterior face, followed by new finish materials. In addition, a new

exterior wall, including a frost wall, will need to be constructed at the new east end of the building.

We recommend the following steps to protect the building from further damage:

1. Remove all disconnected and damaged roof structures and decking, as well as all debris suspended

among the roof framing.

2. Cover all open roof, wall and skylight areas with plywood.

3. Provide a temporary roofing membrane over patched roof areas.

4. Remove all debris from the building and secure the property to prevent further vandalism.


2.2 Building 724

2.2.1 Building Description

Building 724 is a single story, rectangular structure with a flat roof and a raised flat monitor in the center.

The roof and monitor are supported by wood decking carried on wide flange steel beams and columns

(see photo #B-1). The floor appears to be a slab on grade, but the northwest corner is raised up on a

severely deteriorated wood framed platform. The building has a network of steel stud framed interior

partitions, which are severely damaged (see photo #B-2).

The exterior walls of the building consist of solid brick piers with CMU infill panels. The side walls of

the monitor have been removed entirely (see photo #B-3), and the end walls consist of wood planks

with a thin applied veneer of simulated brick (see photo #B-4).

Several small stick built wood structures support shed roofs along the rear of the building. Generally,

these structures are in a state of disrepair.

Specific observations and recommendations for this building are noted below.

2.2.2 Observations

1. The wood decking at the monitor roof is severely deteriorated throughout, particularly along the

perimeter (see photo #B-5).

2. Fire damage was noted at the planks on the east wall of the monitor (see photo #B-4). It appears

that the same construction was used at the side walls prior to its destruction.

3. Roofing and flashing is severely damaged throughout the low roof areas (see photo #B-6).

4. Most of the roof deck and structure on the north side of the building was obscured by ceiling

construction, ductwork and suspended debris (see photo #B-7), but it is likely that conditions are

similar to the exposed areas.

5. All steel beams and columns were observed to have surface rust (see photo #B-8), but distress,

excessive deflection or significant section loss were not found.

2.2.3 Discussion and Conclusions

Building 724 has undergone severe damage due to material impact from adjacent demolition, vandalism

and weather exposure, including rain, snow and multiple freeze-thaw cycles. Wood roof deck has been

severely damaged by water exposure and will likely need wholesale replacement, but the remainder of the

basic structure, including main structural elements, foundations and exterior walls, remain relatively

intact.


Following removal of all existing interior partitions and elevated flooring, the building provides a regular

and fairly open floor plan throughout with two lines of interior columns spaced at 16 feet on center,

with potential for natural lighting through existing and new punched wall openings and/or insertion of

windows at the central monitor.

The building would likely require complete reroofing and deck replacement. Exterior walls are

uninsulated, with variations in materials and isolated damage, so some wall restoration is needed, in

addition to new insulation. This can be applied to either the interior or exterior face, followed by new

finish materials. Additionally, a new exterior wall, including a frost wall, must be constructed along the

interface between Building 724 and the east portion of Building 345, which is already essentially

demolished.

We recommend the following steps to protect the building from further damage:

1. Remove all disconnected and damaged roof structures and decking, as well as all debris suspended

among the roof framing.

2. Cover all open roof, wall and skylight areas with plywood. This will require subframing at the

monitor side walls.

3. Provide a temporary roofing membrane over patched roof areas.

4. Remove all debris from the building.

5. Secure the property to prevent further vandalism.

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Appendix A

Photographs – Building 345

Photo No. A-1 – Steel roof trusses

Photo No. A-2 – Steel trusses on CMU piers


Photo No. A-3 – Suspended steel platform

Photo No. A-4 – Destroyed east end


Photo No. A-5 – Roof deck damaged by falling debris

Photo No. A-6 – Roof deck damaged by falling debris


Photo No. A-7 – Crane support structure

Photo No. A-8 – Surface rust at steel elements


Photo No. A-9 – Damaged roof deck

Photo No. A-10 – Damaged roofing at flat roof area


Photo No. A-11 – Damaged glazing at monitor

Photo No. A-12 – Damaged interior partitions


Photo No. A-13 – Cracks at central CMU wall

Photo No. A-14 – Damage at south wall


Appendix B

Photographs – Building 724

Photo No. B-1 – Roof and monitor support structures

Photo No. B-2 – Damaged interior partitions


Photo No. B-3 – Removed side walls of monitor

Photo No. B-4 – East end wall of monitor


Photo No. B-5 – Deteriorated wood deck at monitor roof

Photo No. B-6 – Damaged roofing and flashing


Photo No. B-7 – Obscured roof structure at north side

Photo No. B-8 – Surface rust at steel members


Appendix C

Building Plan

20141194.K10

JUNE 2018

REMGRIT FACILITY

EXISTING CONDITIONS PLAN

889 BARNUM AVENUE

BRIDGEPORT CONNECTICUT

1" = 10'

56 QUARRY ROADTRUMBULL, CONNECTICUT 06611203.374.3748www.fando.com

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20141194.K10

JULY 2018

REMGRIT FACILITY

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