IFR Combined Report_Redacted.pdf

DEPARTMENT OF THE ARMY

U.S. ARMY CORPS OF ENGINEERS

TRANSATLANTIC MIDDLE EAST DISTRICT

P.O. BOX 2250

WINCHESTER, VA 22604-1450

CETAM-DP-EI

MEMORANDUM FOR RECORD

SUBJECT: OPM-SANG Indoor Firing Range Evaluation Report

1. BOTTOM LINE UP FRONT

The observed damage/cracking is likely due to differential settlement and foundation rotation which appears to be caused by water intrusion about the foundation, while the rear mezzanine area consists of stucco plastic cracking and potentially minor settlement. The observed damage does not indicate concern of the overall structural integrity of the facility, however, recommended repair actions need to be performed to mitigate the impacts of the settlement and observed deficiencies before the facility construction continues to completion. Please see attached for recommended courses of action broken out by engineering discipline.

2. BACKGROUND INFORMATION:

An on-site evaluation of the Indoor Firing Range facility was performed in March 2023 by a Mechanical Engineer and a Structural Engineer, with photos and notes being taken throughout the facility. The purpose of the evaluation was to investigate the current condition of the facility, which has been left abandoned and exposed to the weather for several years after the previous Contractor was unable to complete construction. Drawings of the facility provided by OPM- SANG were used as reference before and during the site visit. The goal was to make observations as to the current condition, document these findings, and make recommendations on how to move forward with awarding a contract for completion of the facility given the current status.

3. OBSERVATIONS AND RECOMMENDATIONS

For the following design disciplines, please see the attached Appendix 1 for Photos with Observations and Recommendations.

a. Mechanical

b. Electrical

c. Communications

d. Fire Protection/Life Safety

e. Structural

f. Civil

Appendix 1

OBSERVATIONS AND RECOMMENDATIONS

a. Mechanical

b. Plumbing

c. Electrical

d. Communications

e. Fire Protection/Life Safety

f. Structural

g. Civil

Communications

• Telephone/Data/Public Address (PA) o Visually inspect all outlets and outlet plates. Replace any that are cracked or broken.

o Visually inspect the conduit pathways and the insides of the pull boxes. Correct any deficiencies o Visually inspect the grounding connections from the cabinets to the bus bar and from the bus bar to the main electrical ground. Correct any deficiencies o Visually inspect the entry handhole. Clean out as necessary.

o Visually inspect the telephone cabinet and data cabinet. Verify that the cabinets are securely fastened to the wall. Correct any deficiencies.

• Testing o Test all voice and data cables with a category 6 test set. All failed cables will be removed and replaced with new cables.

o Test the PA cables, speakers, and ancillary control devices. All failed cables/devices will be removed and replaced with new cables.

o Test the outside plant cable coming into the building. Coordination with the local communication company will be necessary.

o Test the Public address base station and microphone. All failed equipment will be removed and replaced with new equipment.

o Test the data switch and ensure the software and hardware is upgradeable to the current standard. If not, a new data switch will be required.

TALKING POINTS – SANG INDOOR RANGE – INGRAM 18 AUG 2023

BACKGROUND: As agreed a week ago, I’m providing the above from a Project Manager’s perspective.

did find in the recent transmittal some shop drawings that address bullet capture etc. These solutions are different than what we normally use. However, that does not mean those solutions are not effective. The below talking points are intended to provide you insight on risks associated with the ballistic envelope. Hopefully, my colleagues will supplement the below.

1) As built condition vs. design drawings - has indicated that the design included 4 air handlers and the photos show only 3. Consequently, it may not be correct to always assume that the facility is built to the drawings. This would produce an inherent risk regarding the ballistic envelope. It appears most interior areas of the range are complete, and the interior walls are not inspectable to verify if the cross sections match the shop drawings. The shop drawings would suggest that the wall would capture the rounds.

2) Ceiling ballistics: It appears that the design would stop rounds from perforating the roof and escaping. The design approach is different from our standard approach but that does not mean it won’t work. Recommend field verification of steel thickness and layer of material over the steel for splatter, ricochet control, and acoustics. Also inspect for gaps where rounds can by the steel.

3) Courtesy comment regarding foundation and building structure: I believe I remember that the foundation is failing in areas. That makes me question if the weight of all of the ballistic steel was included in the structural and civil design.

4) Rear bullet absorbing wall behind the targets: Not something we are used to seeing but also asserting that it may work. One thing I really question here is the ability of the user to inspect for damage to this wall. It appears that it would receive a lot of rounds and get shot up real quick. Repairs to this wall look to be quite involved from a sustainment perspective and we would never use this design in an Army range for those reasons. Mitigation: you could purchase dura-block in very large chunks and place a “hot wall’ to cover the primary impact areas. This would act as a large bullet trap. We always use bullet traps as solutions to reduce damage to the facility. These blocks would require regular inspection and rotation from a maintenance and safety perspective. They would also require disposal.

5) Target wall about 3’ high: Very unusual approach but it’s there. You could put another hot wall of dura block in front of it as well or remove it altogether. Assume it is there for training purposes. Not sure how that wall integrates and interacts with the targets but that should be explored.

6) Range floor: we normally have smooth finished concrete. Not sure what’s there.

7) Acoustics on side walls and around firing line: Sound attenuation material can be procured and installed over existing. Walls should be verified for ballistic integrity and include ricochet control. Troy acoustics makes some good products that might apply here. There are other alternatives. Sound attenuation is a very important consideration on providing a usable and safe range.

8) Projectile harvest of original impact wall: not sure how they were planning to keep that clean.

However, if a hot wall is used it should capture nearly all rounds.

9) AR 500: slang term for 500 Brinell hardened armor plate – not sure how you verify that this is the type of steel you have in the building unless you have a submittal from the manufacturer.

Perhaps you could live fire some of this and check it or send it off and have it tested.

TALKING POINTS – SANG INDOOR RANGE – INGRAM 18 AUG 2023

10) Operations, Sustainment, and cleaning: This range will be a lead hazard area. Range maintenance personnel will be the ones with the most exposure so this must considered and understood by the user. Not sure if you can model the air flow with any changes done to the inside of the range but laminar air flow is desired/required. You could also perhaps have someone measure/model velocity based on the actual HVAC installed equipment. CRITICAL is the sustainment piece by others after BOD. It is a system that requires regular inspections, cleaning, and maintenance.

11) Lighting: Obviously needs to be verified that target illumination and area lighting will be acceptable.

CORPS OF ENGINEERS

ITEM COMMENT

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

1. General Approach to Mechanical Review

In general, the July 2023 and August 2023 files were reviewed from an engineering standpoint and potential risks are stated in the form of comments (discrepancies, omissions, etc.). The review includes comments on the concept Autocad drawings and review comments on the .pdf files provided, each reviewed as separate submittals.

• UFC 4-179-02, Small Arms Ranges, Chapter 4 is used as a basis for comparison to the actual design, but the design was not checked for strict compliance with the UFC since the design was completed before the UFC was issued and the construction was in progress when halted.

See Comment 2.

A brief statement of the associated risk or recommended plan going forward is noted in the bullet point after each comment when required.

All Transmittals and Plans were verified for content. Unable to locate Shop Drawings for the Indoor Range HVAC System in July or August 2023 File Transfers.

2. UFC 4-179-02

UFC 4-179-02, Small Arms Ranges was issued in March 2020.

The requirements for an Indoor Range ventilation system are more stringent than previous criteria, with very specific requirements, including detailed controls and logic for the VFD supply and exhaust fans, safety interlocks, alarms/safety light conditions, interconnections to other range equipment components, airflow acceptance testing at three heights at the firing line of each lane, and the possible use of smoke tests. It is possible that the

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1 ventilation design done before the UFC was issued will not meet the current criteria. Also see Comment 15.

Excerpted from UFC 4-179-02, Appendix A:

“Providing a ventilation system that limits exposure to airborne contaminants is challenging because:

• Range ventilation is a significant portion of the construction cost.

• Performance testing includes measuring airflow velocities at each lane and firing position and comparing them to strict acceptance standards, and this typically comes near the end of the project.

• Meeting the required average airflow velocity across the width of the range is relatively easy, but meeting airflow requirements at each lane and firing position can be very difficult.

• Numerous failures have occurred when inexperienced range ventilation contractors were used.

• When failures occur, it can be difficult to determine whether the problems are related to the design, construction, controls, balancing, or testing. It can be especially difficult when these responsibilities are split between several sub-contractors, which is typically the case.

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

• The problem persists with both full design and design-build projects.

• Should the system fail to meet the acceptance standards, it may be difficult and time consuming to resolve problems. Significant rework may be required.

It is highly recommended that the contract documents only allow range ventilation contractors with proven experience meeting these or similar performance standards and require that this contractor be responsible for the final design, construction, controls, testing, and balancing of the system. “

• It is reviewer’s understanding that often the Range Ventilation Contractor’s designs are proprietary in nature.

3. Autocad Drawing M-IF-

100-102 PLAN

There are two parameters related to the air supply to the Indoor Range stated in UFC 4-179-02. The required velocity at the firing line is 23 m/min (75 fpm), and the exhaust system must be designed to exhaust 110% of the supply air. The airflows are shown on the concept Autocad plans are specified in I-P units and total 96,875 cfm supply and 106,200 cfm of exhaust air. Conversions to metric are shown below where required.

• Note that there is a discrepancy between the UFC requirements and the specifications found in Shop Drawings ACC-SANG-ME-SD-721F. Also see Comment 15

a. The overall exhaust on this preliminary Autocad drawing is about 109.6% higher of the supply, which is about the same as the UFC 4-179-02 requirement of 110%.

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

• These preliminary Autocad drawings cannot not be used as a basis of the adequacy of the Range ventilation system. Please verify if the final ventilation design meets the criteria used.

b. The Indoor Range dimensions were estimated from the Shop Drawings. It appears that supply airflow of 96,875 cfm at the diffusers and exhaust airflow of 106,200 cfm results in an air velocity at the firing line of about 30 m/min, which is higher than required UFC 4-179-02 (23 m/min).

• Please verify that the actual velocity of the final design will prevent excess turbulence at the firing line.

4. Autocad M-IF- 102 and Autocad

EXHAUST

FAN.dwg

Autocad M-IF-101a and Autocad EXHAUST FAN do not show HEPA filters on the exhaust fan ductwork: Verify if HEPA filtration on the exhaust fans has been provided. HEPA filters are listed on Page 2/3 in file “Remaining Works 2C May,18,2019.pdf” as a deliverable.

5. M-IF-100-102

PLAN HVAC

Autocad M-IF-100 (Ground Floor HVAC Plan) shows supply diffusers and refers to Detail A3 for a Sectional View of the radial diffusers. Could not locate this detail in the Autocad file provided.

6. M-IF-100-102

PLAN HVAC

The supply air cfm or a Schedule for 100% Outside Air A/C units was not located on the Autocad drawings. Verify that the Package A/C units have been adequately specified.

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

7. Autocad M-IF- 101a

Mechanical Plant Plan specifies Aluminum Washable Filters of 50mm thickness for all Package A/C units. Verify the type of filtration required for ventilation supply equipment at this location.

9. Autocad Drawing M-IF-

100-102 PLAN

HVAC

Could not locate the supply air cfm for each A/C unit on Autocad drawing M-IF- 100-102. Total air volume was calculated using diffuser cfm and quantity.

12. Autocad M-IF-

Verify that there is adequate access to the roof for maintenance of the Exhaust Fans.

Review of Shop Drawings and Other Information Provided

13. July 2023 & August 2023 File Transfer

Some the August 2023 information provided indicates that additional design work beyond the Autocad Plans Mechanical Plans had been done. It appears that the additional mechanical design may have changed from some of the approved Shop Drawings of other disciplines. For example,

a. Autocad Mechanical Plans M-IF-100-102 PLAN HVAC.dwg shows four Package A/C Units (Units 1-4).

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

b. Transmittal ACC-SANG-SD-010D, Drawing IFR-SD-A-110 also shows four Package A/C Units (Units 1-4) and 4 Concrete Equipment Pads, measuring 3200 mm X 2450 mm.

c. Site Picture 20230313_095116.jpg shows three Packaged A/C units.

14. General Information

There are drawings from other disciplines that show features of the ventilation system. For Example:

IFR-SD-A-204, Revision 4: Shows quarter-round supply air diffuser in 2 Section views but supply diffuser is not labeled.

IFR-SD-A-105, Revision 4: Shooting Hall, Downrange in vicinity of Bullet Trap, Across Plan North-South

IFR-FLOOR PLAN-2C: Shows six duct symbols across downrange area, 2 are labeled “DUCT UP TO EXHAUST FAN”.

Drawing IFR-SD-A-110 shows 4 Package A/C Units 1-4 and 4 Concrete Equipment Pads measuring 3200 mm X 2450 mm.

15. Shop Drawing

ACC-SANG-ME-

SD-721F (Code B), Page 6/15

This Transmittal contains specifications for the bullet trap by Saudi Electronic Target Systems (S.E.T.S). Page 6/15, Drawing SETS-AZM-01-00-00, Rev 5 Master Plan is dated 1 Feb 2018. Note 5 on this drawing specifies the following for the ventilation system: “The air change rate inside the range area should be 25 times per hour with a minimum flow speed not less than 15.25 meter per minute or 50 feet per minute. The exhaust units should generate a 5% to 7% negative pressure inside the range.” The actual values used in the design are not known at the time of this review.

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

By comparison, UFC 4-179-02 requires 23 m/min (75 feet per minute) at the firing line and exhaust rate of 110% more that the supply. In addition, there can be no single reading below 15 m/min (50 fpm) in one of three airflow measurements taken in the center of each lane at 1 ft. 0.3 m (1 ft), 0.9 m (3 ft), and 1.5 m (5 ft.) off the floor during acceptance testing.

Several criteria were used for the design of Indoor Ranges before the issuance of UFC 4-179-02 in March 2020. The superseded criteria are:

Air Force AF ETL 11-18, (2011), Navy NEHC TM 6290- 99-10 Rev 1, (2002), and MIL-HDBK-1027/3B (1992).

• The airflow and air velocity at the firing line specified at the time SETS- AZM-01-00-00, Rev 5 was issued are comparable to superseded criteria used before UFC 4-179-02 was issued. Please verify if the superseded criteria are acceptable for the SANG Indoor Range.

16. 2023 & August July 2023 File Transfer

Shop Drawing Transmittal ACC-SANG-SD-010D, Drawing IFR-SD-A-110 shows four Package A/C Units (Units 1-4) and 4 Concrete Equipment Pads measuring 3200 mm X 2450 mm. Site Picture 20230313_095116.jpg shows three Packaged A/C units.

17. Aug 2023 File Transfer, Site Photos

Site Picture 20230313_095313.jpg from the 8 August 2023 File Transfer Site Photos shows Nameplate Data for the three supply fans shown:

20230313_095313.jpg:

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

Zamil Model PTX140, Serial Number AHVZB0002M. The Nameplate Data indicates a Cooling Capacity of 1,580,000 (Cooling UOM not listed). Refrigerant listed is R410A. Airflow cfm is not listed. Mfg Date 12-Dec-2018

20230313_095404.jpg:

Zamil Model PTX140, Serial Number AHVZB0003M. The Nameplate Data indicates a Cooling Capacity of 1,580,000 (Cooling UOM not listed). Refrigerant listed is R410A. Airflow cfm is not listed. Mfg Date 12-Dec-2018

20230313_095439.jpg:

Zamil Model PTX140, Serial Number AHVZB0001M. The Nameplate Data indicates a Cooling Capacity of 1,580,000 (Cooling UOM not listed). Refrigerant listed is R410A. Airflow cfm is not listed. Mfg Date 12-Dec-2018

I was unable to locate catalog data for these units. Recommend verifying with the Manufacturer/Supplier the specifications for the units and if a cooling coil has been provided and if the supply air is adequate.

18. Azmeel Excel Spreadsheet, “Remaining Work for Site 2C” dated May 18, 2019

Page 2/3: This spreadsheet lists the Mechanical Work Description, Supplier, and Percent Complete and includes the following:

HVAC System

Duct work, delivery & installation, 30% EF for shooting, and office area delivery & Installation, 0% HEPA filters delivery & installation, 0% Radial diffuser, 0% (See Next Page for Continuation)

Review of All SANG Files and Transmittals 19 Aug 23

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RTLP, SANG Indoor Range Ventilation Assessment WRS-EDT-11263-2

X

ACTION

U. S. ARMY ENGINEER DIVISION HUNTSVILLE

DESIGN REVIEW COMMENTS PROJECT

ACTION CODES

A - ACCEPTED/CONCUR

D - ACTION DEFERRED

W - WITHDRAWN

N - NON-CONCUR

VE - VE POTENTIAL/VEP ATTACHED

DRAWING NO.

OR REFERENCE

SITE DEV & GEO

ENVIR PROT& UTIL

ARCHITECTURAL

STRUCTURAL

MECHANICAL

MFG TECHNOLOGY

ELECTRICAL

INST & CONTROLS

SAFETY

ADV TECH

ESTIMATING

SPECIFICATIONS

SYSTEMS ENG

VALUE ENG

OTHER

REVIEW

DATE

NAME

CEHND FORM 7 (Revised) 15 Apr 89 PREVIOUS EDITIONS OF THIS FORM ARE OBSOLETE PAGE OF 1 1

Balancing, 0% AC Split Installation, 30% Testing & Comm. For All Mechanical Systems, 0%

Email from SANG Venetian Blind Bullet Trap

When I waas checking the NEHC, I found a venetian blind bullet trap, and it sounds similar to what SANG is planning.

“3.4.3 Venetian blind. Several impact plates are angled at approximately 35 degrees to direct the bullets downward into a deceleration chamber. The plates are set such that they have the appearance of a venetian blind. The leading edges are sharpened in order to split bullets that strike right on the edge. Maintenance is required to keep the edges sharp for proper operation.”

So this type of bullet trap has been acceptable in the past.

Thanks, Mechanical Engineer, EDM-M

U.S. Army Corps of Engineers

Engineering and Support Center, Huntsville

DEPARTMENT OF THE ARMY

U.S. ARMY CORPS OF ENGINEERS

TRANSATLANTIC MIDDLE EAST DISTRICT

P.O. BOX 2250

WINCHESTER, VA 22604-1450

CETAM-DP-ED 15 November 2023

MEMORANDUM FOR RECORD

SUBJECT: OPM-SANG Indoor Firing Range Potential Construction Completion Evaluation Report

1. SUMMARY

Based on the observations of the USACE project development team, the partial/incomplete information provided does not constitute the documentational requirements needed to determine if the facility has been designed or constructed to adequate standards.

2. BACKGROUND INFORMATION:

USACE was tasked to do an evaluation and review of the Indoor Firing Range documentation (Contract drawings, shop drawings, BOQ lists, IGE, etc.) received from OPM-SANG to determine the feasibility of providing construction contract and management services to complete the project.

3. OBSERVATIONS AND RECOMMENDATIONS

For the following USACE design disciplines, please see the attached Appendix 1 for Observations and Recommendations.

a. Architectural

b. Mechanical

c. Electrical

d. Communications

e. Fire Protection/Life Safety

f. Structural

h. Geotechnical

4. RECOMMENDATIONS

USACE declines the opportunity to provide construction contract and management services for this project and recommends OPM-SANG hire a local contractor to complete the construction via an item punch list type contract.

Appendix 1

OBSERVATIONS AND RECOMMENDATIONS

b. Mechanical

c. Electrical

d. Communications

e. Fire Protection/Life Safety

f. Structural

h. Geotechnical

Exterior

Inspect all finishes (to include, but not limited to walls, roofs, windows) for damage, repair or replace as necessary.

Inspect all material connections & joints, repair or replace as necessary.

Coordinate all repair/replacement work with other disciplines.

Inspect all doors and door hardware, replace as needed.

Correct all instances of doors & door hardware being installed backwards or incorrectly.

Paint to match where required.

Coordinate any work that has not been completed or is only partially completed with the appropriate disciplines.

Clean all finish surfaces.

Verify applicable building and life safety codes and confirm building meets all requirements.

Interior

Inspect all finishes (to include, but not limited to floors, walls, ceilings, windows) for damage, repair or replace as necessary.

Inspect all material connections & joints, repair or replace as necessary.

Clean all working/countertop surfaces, repair or replace as necessary.

Clean all stainless steel and porcelain fixtures, repair or replace as necessary.

Coordinate any work that has not been completed or is only partially completed with the appropriate disciplines.

Inspect all doors and door hardware, replace as needed.

Correct all instances of doors & door hardware being installed backwards or incorrectly.

Coordinate all repair/replacement work with other disciplines.

Inspect and test bullet trap and all ballistic protections in and around the shooting hall to verify they meet the required protection levels.

Verify applicable building and life safety codes and confirm building meets all requirements.

What is missing preventing a complete construction package to be produced:

Specifications.

Scope information to determine if facility meets minimum requirements.

Coordinated drawings. Documents provided show conflicting information, and do not match constructed conditions as shown in the photographs.

Complete drawing sets (missing enlarged plans, wall sections, details, schedules, etc.).

Lack of information regarding the codes and standards the facility was designed to meet.

Complete extent of damage and deficiencies in existing building.

No information or documents on FF&E or SID scope were included in provided information.

b. Mechanical

Access to this building is needed to see how much plumbing design has been done and that can educate the rest of the decision we make going forward.

As far as air-conditioning, no schedules provided, need to conduct a new building calculation.

c. Electrical

Incoming power supply:

Supply, install, test & commission sub-main circuit: 600/1000V XLPE multi-core copper cable in conduits or on cable tray (measured separately) including tapes, conductors, junction boxes, connection for feeders, and various power loads for complete installation as per project drawings and technical specifications.

Power and lighting Installation:

Supply, install, test & commission power and lighting accessories including all necessary boxes, plates, pipes, wires, cable trays, switches, sockets, and as required seal enclosures as per project drawings and technical specifications.

Supply, install, test & commission Lighting fixtures complete with luminaries, ceiling roses, heat-resisting flexible cables, switches, and mounting accessories as per project drawings and technical specifications.

Supply, install, test & commission power panelboards including circuit breakers, grounding, markers, and directory required for complete installation as per project drawings and technical specifications.

Deficiencies:

There is contradiction about the panelboard’s location in the building between the design CAD drawings and the project deign submittals. Exact panel boards location need to be checked on site.

d. Communications

OSP copper and fiber optic cables will need to be run into the building to the cabinets and terminated. Who is responsible for providing the OSP cables in Saudi?

The voice cabinet (1) will be for copper dial tone lines, cross connect panels will need to be installed with cross connects made to the voice outlets.

The data cabinet (2) cabinet is for fiber optic cable to terminate. Terminating panels will need to be provided and FOC spliced into them. The customer will need to provide their electronic switch(es) and cross connects will need to be made to data outlets. USACE does not provide active electronic equipment including phones and switches.

End-to-end testing will need to be completed.

e. Fire Protection/Life Safety

Insufficient Information:

Only architectural shop drawings were provided.

There is no documentation showing the as-builts or shop drawings for the fire alarm system, therefore it is unclear what is installed.

The architectural drawings do not include a life safety analysis showing fire ratings, occupancy analysis, occupant load calculations, etc.

No site plan is shown indicating fire department access or fire hydrants.

No product data.

No fire alarm voltage drop calculations.

Conflicts between architectural shop drawings and the contract fire alarm drawings.

The layout shown on the architectural drawings do not match the contract fire alarm drawings, which makes it unclear what changes have been made and how the fire alarm system design has been affected.

Without a code analysis it is unclear if fire suppression is needed: UFC 4_179_02.

“Small Arms Ranges” does not require fire suppression in the training or trap area, but the support areas may require fire suppression if the square footage exceeds 465 sqm.

As the shop drawings indicate they are not-to-scale, actual area calculations are unclear. However, rough estimation appears they may exceed this limit.

Additionally, the above UFC requires a 2-hour fire separation between the range and indirect support areas. It does not appear this is provided.

Package development concerns:

The amount of information provided, and the organization/presentation of information is poor. However, if architecture was able to develop drawings with the required information, fire protection drawings could be developed.

More site-related information would be needed – the extent of information depends on the design.

As-builts needed for mass notification, fire alarm, fire suppression and life safety.

This should include all calculations, product data, test reports.

Only after as-builts or an evaluation of what is installed are provided, can we determine the items that need to be addressed.

f. Structural

The structure is in pretty good shape with minor structural items that need to be addressed to prevent long-term serviceability issues, i.e. pinched doors/windows, more tiles and interior stucco (similar to level 5 finish) cracking, etc.. Recommend not complete demolition of the facility.

Items to be addressed:

Regrading of the site to prevent further water intrusion/ponding about the foundations which is likely causing the differential settlement. Further geotechnical investigation should be completed to determine whether micro piles or underpinning (most extreme/worst case) is needed, or if sealing the cracks with an epoxy-based injection.

Cutting out all cracked and chipped stucco to determine severity of crack in order to repair properly.

Repairing masonry (cmu and concrete) overhead infill walls and bracing the CMU walls with steel angles every 4’-0” (1200mm) o.c. for out of plane loading. Quality of construction is unknown, but appears to be overall satisfactory, and not much effort would be needed to install this bracing as a precaution.

Repairing overhead masonry ceiling. This will require temporary shoring to cut out honeycombed concrete, measure the exposed rebar to determine if any cross-sectional area is degraded, repair the rebar if necessary, and skim coat back with a higher compressive and tensile strength epoxy (compared to using concrete or mortar). These areas can be leaking from the roof and further investigation is needed.

Package development concerns

Not sure if a full set of drawings would suffice, an itemized list with requiring the contractor to investigate each item might be more beneficial, and perhaps an onsite follow-up by the PDT when the contractor has all the items exposed prior to starting his work.

g. Civil

Complete final grading and paving.

A 11m setback issue from parking area to Firing Range needs to be confirmed.

h. Geotechnical

Recommend performing a geotechnical investigation and/or obtaining the previous investigation to determine the cause of the settlement (elastic, gypsum, collapsible soils?) and if the ponding/source of water infiltration is remediated will settlement continue (consolidation/creep).

Three (3) pages of the previous geotechnical Investigation conducted by “Riyadh Geotechnique & Foundations Co.” were provided in ACC-Sang-ST-SD-743B. On one of these pages a partial section appears to recommend a design bearing pressure of 200 Kpa for isolated/strip/mat foundations placed a minimum of 1.5m below grade. The tender drawings appear show a depth of footings of 3.25m. A generic modulus of subgrade reaction is provided for the foundation design but as this value matches the one provided for the slab on grade and should be specific to the size/loading conditions of the footing, should not attempt to use this value to estimate the settlement/differential settlement.