180940 Addendum 01 LHB.pdf

Construct Small Arms Range 6/22/2021

FMKM179063

ADDENDUM 01 Page 1 of 12

LHB #180940

ANSWERS TO CONTRACTOR QUESTIONS:

1. Question: Several product substitutions have been submitted requesting prior approval.

Response: prior approvals will not be given during bidding. Refer to Specification Section 01 1005

Governing Specifications and 01 2500 Substitution Procedures, 3.02 and 3.03.

2. Question: I am reviewing the aluminum windows on this project and it appears there are some discrepancies in the windows detailed compared to the windows listed in the specifications.

The only details I have located in the plans show the windows as single pour & debridged storefront framing - see below.

The basis of design storefront system listed in section 084113 has dual pour & debridged thermal break, similar to the Tubelite TU24000 - see below:

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Additionally, there is a separate factory fabricated fixed aluminum window specified in section

085113.

Last - both the storefront section (084313) and aluminum window section (085113) list a system U-

Factor requirement of 0.29 (which is likely required by code for Climate Zone 7). The issue I'm seeing is the center of glass (COG) U-Factor listed in section 088000 is 0.29. To the best of my knowledge, I don't believe any aluminum window or storefront system can meet a 0.29 system U-

Factor when using glass with a 0.29 system U-Factor. For reference, Tubelite's dual pour & debridged TU24000 storefront can meet the 0.29 system U-Factor if using glass with a COG U-

Factor of 0.22 with a warm edge spacer, or when using glass with a COG U-Factor of 0.20 and an aluminum spacer - in order to for the glass to have COG U-Factors this low, these would likely each be dual low-E glass units with argon.

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Additional reference - DeSCo (a factory fabricated window manufacturer we also represent) has a

3-3/8" deep fixed window (i85) that can meet the 0.29 system U-Factor when using glass with COG

U-Factor of 0.24 (one low-E surface) and a warm edge spacer.

Response: The drawing details are not meant to provide a specific manufacturer or aluminum window profile. Refer to the Window & Storefront specifications for requirements. The design intent was to use aluminum window specification for the punched window openings and storefront specification at the entries. The contractor may choose to use storefront system at the punched openings as well. The U-factor of .29 max is per Minnesota Energy Code, climate zone 7.

3. Question: We have reviewed the specifications and drawings, both dated October of 2020 for the above referenced project RFP. We note that the specifications Section 13 3450, para. 1.03 A.

identifies USAF ETL 11-18 as the main controlling configuration/requirements document, however this document was superseded some 15 months ago—in March of 2020, by UFC-4-179-02 (Small

Arms Ranges). We have additionally been advised by USAF small arms range certification personnel that while exceptions have been granted in the past on some ANG modular-style ranges delivered in 2013 and 2018 due to the limitations inherent when using shipping containers as a basis and as a stopgap measure until the UFC was issued, no further exceptions/waivers will be granted going forward.

As evidence of compliance with the new standard, the USAF has already taken delivery—last month at Tyndall AFB, of the first operational modular range that is fully-compliant with UFC-4-

179-02, so it is possible to comply with the dimensional and layout/configurational requirements as well as the new, more stringent sound and air testing criteria, while still being a modular structure.

Also, another modular range currently being assembled under contract at Offutt AFB was bid in

September 2020 and was required to be compliant with UFC-4-179-02. Further, an award is pending for the supply of a modular range at Columbus AFB, which was bid in December 2020, and also required compliance with the new criteria.

Are the MN ANG and MN ARNG Contracting shop aware of the new UFC, and if so, do they still intend to contract the procurement of a ‘new’ product which does not comply with modern standards already in effect prior to the design date, and well before the RFP date? Will the exceptions to required lane widths, ceiling heights and configurational features be waived even though modern modular fabrication doesn’t require these waivers? Or will there perhaps be an

Addendum issued updating the specifications to require compliance with Department of Defense’s new small arms range requirements?

Response: We are to follow ETL 11-18 as current when design was contracted and was completed beyond 35% when the new UFC came out.

4. Question: A 03 Specifications Small Arms Range, Section 13 3450, part 1, paragraph 1.03, bullet point A. (PDF Page 279), references ETL 11-18 as the design specification for the modular small arms range. ETL 11-18 has been superseded and replaced by UFC 4-179-02. Please can the

Government confirm if vendor’s should reference the UFC instead of the ETL? If not, can the

Government please provide a copy the latest version of ETL 11-18 as this is no longer accessible on

Government website.

Response: We are to follow ETL 11-18. A copy is attached to this addendum for reference.

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LHB #180940

5. Question: (See Attachments: UFC 4-179-02 & AFOSH 48-20). Section 13, 2.06 MATERIALS - WALLS, FLOORS, CEILINGS AND ROOF it states : 2. Tactical/ballistic rubber splatter protection shall extend from the bullet trap to the shooting stalls of all lanes. “ Under no circumstances will the extensive use of rubber result in a RT60 reverb time of either 1.5 seconds or 1.3 seconds as outlined in the

ETL and UFC respectively. It will not meet guidelines established in the AFOSH document. Would the government consider the Troy System to meet the ETL or UFC acoustic requirement? Note: this

ETL/UFC acoustically compliant system is installed in over 25 military ranges.

Response: Any System may be provided if it meets the performance requirements.

6. Question: Section 13 1.03 REFERENCE STANDARDS A. ETL 11-18, Small Arms Range Design and

Construction, 19 April 2011. Except where requirements are otherwise excluded by this

Specification. We have been advised that the UFC 4-179-02 replaces the ETL 11-18. A copy of the document is enclosed. Does this range need to comply with the performance driven RT60 1.3 seconds acoustics requirement in the UFC ; which requires post testing to assure compliance?

Response: Design is to follow the requirements of ETL 11-18.

7. Question: The mounting application for the lightning protection system. In my review of the spec, I found that the engineer is requiring the lightning protection system be installed to the most current edition of the AFI 32-1065 standard. This would be the 2020 edition. In this current standard, it is not allowed for the lightning protection to be adhered anywhere on the project. Due to this not being allowed, we have to find another means of attaching/fastening the lightning conductor to the roof surface. The only option that we can find for this is to lay out concrete pavers on the roof where our lightning conductor is to be ran and fasten our system to the pavers using a nail-in anchor or something equivalent. To avoid the use of the concrete pavers and to allow the lightning protection system to be adhered to the roof, we would need written permission from the owner to install the lightning protection to the 2015 edition of AFI 32-1065. That is the last year of the standard that allowed for adhesive cable holders to be used. This would also make is possible for us to adhere our system on the metal parapet cap as well since per the engineered drawings, they would like the lightning protection to be attached to the vertical wall just under the parapet cap by means of screwing through the membrane wall. I can’t imagine anyone would like this option due to the amount of holes we would be putting in the roofing material.

Response: Attachment of the lightning protection system to the roof shall include fastening as approved by roofing membrane manufacturer for roofing system and warranty to be provided.

8. Question: Please provide clear explanation and scope of the note on details 1 & 2 on sheet A311

“rigid insulation R-20 for 24”. It is not clear where this occurs in its’ entirety.

Response: This is underslab perimeter insulation per Energy Code. It occurs around the entire perimeter of slab. See also update to drawing sheet this addendum.

9. Question: Please confirm the vertical rigid insulation at the entire perimeter foundation is a single layer of 3” 25 psi rigid insulation.

Response: Vertical foundation insulation to be rigid insulation R-10 minimum. See updates to drawing details this Addendum.

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LHB #180940

10. Question: Q7. 13 3450, 1.03. Lists ETL 11-18 as the USAF range design standard and governing design document for the small arms range but UFC-4-179-02 has superseded it as of March 2020. If the UFC is not going to be used because of previous design progress at the time of UFC publication, would the government implement some of the new requirements, such as those that are health and safety-related; like airflow and sound requirements (to include any stricter testing limits), or those new requirements not otherwise requiring any lateral dimensional / footprint changes?

Response: Follow ETL 11-18 and Specification 13 3450.

11. Question: Q8. 13 3450, 1.05, E. Refers to a “noise study.” Will the government require the study to be performed to modern standards as described under UFC-4-179-02, paragraph 4-20, and must the study show compliance with the passing criteria provided in subparagraph 4-20.5.1?

Response: The new UFC is not incorporated.

12. Question: Q9. 133450, 1.06, A. Requires specific previous experience by companies having a minimum of documented experience, “specializing in the design, development, production, and delivery of modular, transportable Modular Ranges.” Can the government confirm that only companies possessing this specific past-performance and experience will be deemed to have met the required qualifications to provide the modular range?

Response: Yes.

13. Question: Q10. 133450, 1.06, B. Requires government pre-inspection of an “operational” range at the manufacturer’s site prior to delivery and installation, however, to reduce costs, some modular range companies routinely wait to perform some final work required for full operation until the modular range is at the final site. For example, shipping HVAC units directly to the site from the

HVACmfr saves double freight costs and placing the units on the modules only once; at the final site, saves triple labor costs. Therefore requiring this extra step, especially from companies already possessing the required experience and proven past performance required by paragraph 1.06B, unnecessarily increases the overall labor and freight cost to the range manufacturer, as well as government travel costs for the additional inspection . It also gives an advantage to the only company which routinely performs this “pre-assembly/disassembly/reassembly” without any measurable advantage to the end users. Will the government waive this unnecessary requirement?

Response: 148FW will waive the requirement for pre-inspection at the manufacturer’s site. Upon inspection at the project site, any required corrections will be made at no cost to the Government.

14. Question: Q12. 13 3450, 2.03, A., 1. & 2. Can the government please clarify that the deviations from the 5’-0” center-to-center lane width requirement of ETL 11-18 and the statement that, “minimum lane width shall be 4’-0”,”means that the lane spacing shall be a minimum of 4’-0” center to center, and further, that each lane adjacent to any wall must also have a minimum of 4’-0” from the center of the nearest stall divider to the finished wall surface, including any sound and anti-ricochet treatment which may be applied to the wall?

Response: 4’ lane spacing is a minimum dimension that must be met. See response to question 49.

Distance of 4’ from outside wall to edge of outer firing lane is acceptable.

15. Question: Q13. 13 3450 2.03, A., 3. Normally, a bullet trap extends for the same width as the firing line. Can the government clarify what is meant or intended by this statement?

Response: The bullet trap does not need to extend the full length of the firing line if the modular design and construction eliminates ricochet/backsplash ricochet hazards.

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LHB #180940

16. Question: Q14. 13 3450, 2.03., B. Includes a list of only three allowable deviations from ETL 11-18.

Note that ETL 11-18, para 7.2.11.1.3. specifies a raised control booth and an unobstructed view of firing and impact area. A clear-span style range with no interior walls is needed to satisfy this requirement. Since no deviation was made for this paragraph, can we therefore assume that there is

NO deviation allowed from ETL 11-18, para 7.2.11.1.3., and that both a minimum 2’-0” raised control booth, and an unrestricted view of the entire firing line AND projectile impact area are required?

Response: Deviation will be added as follows –“Full clear view of the firing line and the impact area from the control booth is not required”.

17. Question: Q15. 13 3450 2.03., D. With regard to floors, can the government clarify that the entire floor of the live-fire area—from the wall behind the firing line to the bullet trap, is to be treated with ballistic splatter and ricochet protection?

Response: Confirmed.

18. Question: Q16. 13 3450 2.03., E. Describes a single manufacturer’s proprietary stall divider panel and there are many different commercially-available stall dividers, including clear stalls, properly rated to defeat errant shots. Will the government delete the reference to ‘aluminum tread plate or black finished’ as it relates to stall panels, or modify to allow any stall divider which meets the ballistic requirement?

Response: The government will allow any stall divider that meets the ballistic and clearance requirements of the lanes.

19. Question: Q17. 13 3450 2.03., H. Can the government please clarify this paragraph and its intent?

Response: As an alternate, stall panels may be manufactured using clear ballistic materials that are equivalent in strength and ballistic resistant qualities as the specified material. The Contracting Officer shall make the final determination if the system is acceptable. The Contractor shall bear the full cost of the demonstration and final system selected with no change in cost.

20. Question: Q18. 13 2450 2.03., N. Can the government provide the numerical temperature range that was intended to be in the blank space?

Response: 2.03 N has been omitted.

21. Question: Q19. 13 2450 2.05., B., 2. Normally a bulletproof window would be housed in an armor-fortified/clad frame. Can the government clarify that only a 14-gauge metal frame should house the

Level 8 bulletproof window?

Response: Both 14-gauge metal frame and armor-fortified frame are acceptable.

22. Question: Q20. 13 3450 2.05., E., 3. Modern standards (UFC-4-179-02) require AR steel on bullet trap impact plates to comply with MIL-A-46100 and following this requirement should have no significant impact on the design parameters of the project. Will the government be requiring bullet traps to meet this modern updated standard?

Response: Spec section 13 3450, 2.05E.3 specifies AR500 steel for bullet trap.

23. Question: Q21. 13 3450 2.05., E., 4. Can the government clarify what is meant by “long term” and

“maintenance free?”

Response: Paragraph 2.05 E.4 is omitted.

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24. Question: Q22. 13 3450 2.05., E., 6. This paragraph refers to a single manufacturer’s proprietary bullet trap and thereby creates a de facto sole-sourced procurement. Will the government delete this paragraph in its entirety and allow any COTS steel bullet trap meeting the ballistic containment requirements?

Response: Spec section 13 3450, 2.05 E.6 shall not be deleted.

25. Question: Q23. 13 3450 2.06., B., 1. This paragraph makes reference to a non-dimensioned “storage room” as part of the modular range, however, no storage room can be located on the drawings.

Please clarify if there is a storage room required, and if so, specify the size and location.

Response: Storage room is not required.

26. Question: Q24. 13 3450 2.06., B., 2. This paragraph requires ballistic rubber splatter protection on the walls. Will the government accept another material for ballistic splatter protection, provided it has been tested and previously approved by the USAF for said purpose?

Response: Government will approve alternate materials for splatter protection currently approved by USAF.

27. Question: Q25. 13 3450 2.06., D., 1. Modern requirement per UFC-4-179-02 is for a ceiling height of

8’-0” from the finished floor at the firing line and following this achievable height requirement should have no significant impact on the design parameters of the project. Will the government update the minimum ceiling height requirement to the modern standard of 8’-0”?

Response: The allowed ceiling height as specified remains. Minimum ceiling height shall be 7’5”.

8’-0” ceiling height is also acceptable.

28. Question: Q26. 13 3450 2.06., D., 2. A requirement for removable panels/with fasteners/plugs to apply/verify application of thermal insulation favors one manufacturer’s fabrication method and creates a de facto sole-sourced project. Verification can be made by photographs supplied prior to the closing of sealing panels. Will the government delete or modify this requirement to eliminate favor to a single manufacturer?

Response: Requirements of 13 3450, 2.06 D.2 remain.

29. Question: Q27. 13 3450 2.06., D., 3. Seems to repeat the requirement in B., 2. of the same section.

Same question as above for B., 2.

Response: Government will approve alternate materials for splatter protection currently approved by USAF.

30. Question: Q28. 13 3450 2.06., E. Requires both sound absorption materials and ballistic rubber splatter protection on all baffles. Ballistic rubber is not sound absorptive and most sound absorption material does not contain splatter. Will the government consider the implementation of a dual-purpose (sound absorption and splatter protection) material that has been previously tested and approved by the USAF for this dual purpose?

Response: Government will consider dual-purpose material that meets the intent of sound absorption and splatter protection.

31. Question: Q29. 13 3450 2.07., E. Normally a bulletproof door would be housed in an armor-fortified/clad frame. Can the government clarify that only a 18-gauge metal frame should house the

AR500 armored doors preventing bullets from leaving the range?

Response: Updated 13 3450, 2.07E to 14-gauge metal frame. Armor-fortified frame is also acceptable.

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1. Question: Q30. 13 3450 2.09., A. 2. Makes reference to “HEPA filtration,” and to a “HEPA filter rack,” but then lists “95 – 99.97%” as the efficiency. Note that true HEPA is only 99.97% efficient to 0.3 microns. 95% DOP (Dioctyl Phthalate) filters are not HEPA. Also, no prefilters are specified for the exhaust, upstream of the final filters. Please specify the prefilters (if required) and their “MERV” value, along with the “MERV” value of the required final filters. Please also specify if the “HEPA filter rack” is required to be HEPA certified.

Response: MERV 13 is required for pre-filters. Final filters to be HEPA filters rated at 99.97% for

0.3 Micron particles. HEPA filter rack shall be HEPA certified.

2. Question: Q31. 13 3450 2.09., A., 5. Can the government clarify the term, “easy access” as it relates to filters. Also, same question as in 2.09., A., 2. regarding the use of the term, “HEPA filter” and the efficiency required in terms of a “MERV” number.

Response: hinged access doors with latching handles. See response to Q30.

32. Question: Q32. 13 3450 2.09., B., 1. Makes reference to a “two-stage filtering process described in paragraph 1.17G above,” however, no such two-stage filtration system is described and no paragraph 1.17G exists in the document. Can the government please clarify?

Response: Reference should be to paragraph 2.09A.2.6

33. Question: Q33. 13 3450 2.09., F 11. b. Calls for “one to two low level dimmable red lights” in the

Get Ready area. Please clarify if one light or two lights are required.

Response: Assume 2.

34. Question: Q34. 13 3450 3.04 Refers to a noise study to be accomplished in accordance with several standards. In the interest of shooter and range personnel health and safety, will the government add the modern DoD indoor range testing requirements and parameters contained in UFC-4-179-02, Section 4-20?

Response: Noise survey shall be conducted as indicated in the specs and ETI 11-18.

35. Question: Q36. Section 01 40 00 Quality Requirements 1.03 Contractor's Design Related

Professional Design Services C.1 Address Section 13 34 19 Metal Building Systems. This section isn't part of this spec or the Table of Contents. Does this apply to any other sections?

Response: Metal Building systems does not apply to this project. It should reference 13 3450 instead.

36. Question: Q37. A 03 Specifications Small Arms Range Section 13 3450, part 1, paragraph 1.03, bullet point A. (PDF Page 279) ETL 11-18 have been superseded by UFC 4-179-02. Please can USG confirm if vendors should be referencing this UFC in-place of the ETL?

Response: ETL 11-18 remains the standard to follow.

37. Question: Q39. Request for Clarification A 03 Specifications Small Arms Range Section 07 4213 Is the modular range required to be sided with metal wall panels per section 07 4213?

Response: Yes.

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38. Question: Q40. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.05, bullet point B (PDF Page 281) Is the wall between the control booth and the range required to be ballistically protected?

Response: See 2.05 B.1 calls for the wall between the Control Booth and range to be 3/8” AR 500 steel.

39. Question: Q41. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.05, bullet point E (PDF Page 281/282) Please can USG confirm that ETL 11-18

Paragraph 7.5.7.4 means that only horizontal deceleration chamber bullet traps which span with a single chamber from lane 1 to 10 (or 12 if options are exercised) are acceptable? Meaning that vertical chambers are not acceptable?

Response: Commercially designed and constructed bullet traps that meet the criteria are permitted.

40. Question: Q42. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.06, bullet point F (PDF Page 282/283) Does USG intend that the roof covering is separate from the modular range construction?

Response: The range is to have a roof structure and roofing system with insulation as outlined in the Specification and drawings.

41. Question: Q43. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.09, bullet point C (PDF Page 284) Will the fire suppression system be a wet or chemical system?

Response: Refer to Drawing Sheet F001

42. Question: Q44. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.05, bullet point B (PDF Page 281) Is there any reduction of noise level inside the control booth from the firing line required? (ETL 11-18 Paragraph 7.2.9)

Response: Noise reduction inside control booth is not required.

43. Question: Q45. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.05, bullet point B (PDF Page 281) Is a two foot raised floor required in the control booth? (ETL 11-18 Paragraph 7.2.11.1.3)

Response: Not required.

44. Question: Q46. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.05, bullet point B3 (PDF Page 281) Will the independent HVAC to service the control booth have to be roof mounted?

Response: Per 2.09A1, all range HVAC equipment is assumed to be mounted in the range roof.

45. Question: Q48. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

1, paragraph 1.05, bullet point E (PDF Page 279) Please provide details of what is required For the noise study?

Response: Refer to 13 3450, 3.04 B.

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46. Question: Q49. Request for Clarification A 03 Specifications Small Arms Range Section 13 3450, part

2, paragraph 2.03, bullet point B.1 (PDF Page 280) The section specifies a minimum lane width of 4ft.

Can the government confirm if 4-ft is a nominal dimension or an exact dimension that must be met?

Response: It is a minimum dimension that must be met along with overall criteria for number of lanes, ballistic protection etc. Range must fit within overall building size and site clearances available. Refer to the drawings.

47. Question: Q59. Are there any specifics for air exchanges or any covid related filtration systems with this project?

Response: Refer to 13 3450 2.09 A for HVAC requirement of the modular range.

48. Question: Q60. Are there any electrical grounding requirements that require CAD welding or exothermic welding of any kind?

Response: A60. Refer to 26 05 26 Grounding and Bonding for Electrical Systems, 2.02.C for exothermic weld requirements and exceptions.

49. Question: Q61. Are there any soil contaminates or harmful products within the soil that could pose health risks or environmental risks or available environmental reports for the site?

Response: No contamination is known. No environmental reports are available.

50. Question: Q67. When is the intended project start date for this project?

a. With items such as metal roof trusses and firestone insulation being in short supply and lead times being several months out (5 to 6), will a winter exclusion period be issued with this contract or

FAR 52.242-14 suspend work due to weather, in turn considering this a spring project?

Response: Start date will be dictated by time of award, weather, and material availability and will be coordinated with the Contractor.

51. Question: Q74. Does this project require a confined space entry plan?

Response: There will be work inside electrical manholes which is considered a confined space.

52. Question: Q75. Does this project require an approved SWPPP plan prior to installation of erosion control measures being installed?

Response: Refer to Drawing Sheets C001, C002.

53. Question: Q76. Specification section 01 4000 1.03 states the contractor is to provide profession design services. This also references the structural components of the modular small arms range.

Can you please clarify if this is to include the engineering on HVAC and Electrical components?

Response: Yes. Refer to Spec 13 3450 Modular Small Arms Range, 2.09 Systems.

54. Question: Q78. Are there any requirements for fire suppression or fire detection in the modular small arms range portion of the work?

Response: Refer to F001 for fire suppression requirements in the modular section of the work.

Refer to forthcoming addendum for additional requirements to be added to F101 for fire alarm requirements.

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55. Question: Q79. Does the HVAC, electrical or fire detection system need to tie into any existing systems that may already be in place on the Air Force Base? i.e BAS system or preferred fire detection system

Response: Yes, refer to the following specifications: 23 09 23 Direct-Digital Control System for

HVAC, 2.01.A; 28 3139 Fire Alarm and Mass Notification, 1.04.A.

56. Question: Q80. Is the contractor responsible for any movable furniture/equipment such as tables or chairs etc. on this project?

Response: No. Furniture shown dashed is for reference only. It is not in contract (NIC), Government Furnished Government Installed (GFGI).

57. Question: Q86. The specification in many locations has listed "Vindicator" as the Security system, this needs to be updated to Advantor.

Response: Refer to forthcoming Addendum to clarify product reference.

58. Question: Q87. The Drawings do not show a location for the Security System Control panel in this new space.

Response: Refer to forthcoming Addendum to clarify location.

59. Question: Q88. Is this new space considered SCIF ICD 705 compliance space for access control and

Intrusion, or controlled by the base Security Forces.

Response: Space shall be controlled by base security.

60. Question: Q89. There are (3) W-1 windows. The material schedule on sheet A711 sows (2) types of window blinds. Which type goes to which location?

Response: The Room Finish Schedule indicates which blind type in each room. Windows in

Classroom 102 get both W1 and W2 (includes room darkening type) and Office 101 gets WT1 only.

61. Question: Q93. Looks like base bid includes “new” 12” gravel for the drives and lot. Option 1 indicates Bituminous pavement in lieu of gravel. Is the intent of option 1 to construct the same area per full design (33” total depth)?

Response: The intent is to construct the full 33” section depth whether gravel surface or bituminous surface.

62. Question: Q94. There is a considerable amount (depth) of uncontrolled fill on the site, listed as silty sand. Braun (C.1.c in the report) states the existing fill (no organics/debris free) can be reused. Is this the intent of the owner?

Response: The project specification section 31 2323 Fill clearly states the quality of fill materials allowed for use and where and what type of material is to be utilized in specific locations.

63. Question: Q96. There’s conflicting information on fire sprinkler systems. Is it required or not?

Response: Refer to Drawing sheet F001.

64. Question: Q100. Section 22 05 01 1.03 A. says to refer to section 01 91 13 for commissioning. 01 91

13 is not in the specs, please clarify how we should bid commissioning.

Response: Disregard. There is no formal commissioning process on this project.

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CHANGES TO SPECIFICATIONS:

65. Refer to Section 01 4000 – QUALITY REQUIREMENTS:

a. At 1.03 C.1., replace ”…Section 13 3419 – Metal Building Systems” with “..13 3450

Modular Small Arms Range”.

66. Refer to Section 08 8000 – GLAZING:

a. At 2.04 C.6, change “minimum” to “maximum”.

67. Replace Section 13 3450 – MODULAR SMALL ARMS RANGE in its entirety with revised Section 13

3450 (attached).

68. Refer to Section 22 0501 – PLUMBING GENERAL PROVISIONS:

a. Omit Paragraph 1.03

69. Refer to Section 23 0923 – DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC:

b. At 2.01 A. change to indicate, “New DDC system shall be by ALC, UHL, or other system compatible with Niagara framework, programmed in such a way to replicate points and logic used elsewhere on the Base.”

70. Refer to Section 26 0513 – MEDIUM-VOLTAGE CABLES:

c. Add paragraph 3.04.N as follows – “N. Fireproof cables in manholes using fireproofing tape in half-lapped wrapping. Extend fireproofing 1 inch into duct.”

CHANGES TO DRAWINGS:

71. Refer to Drawing Sheet A311 – WALL SECTIONS:

a. At Details 1 and 2, change note at underslab insulation to say, “Rigid Insulation R-15 for 24” typical around entire perimeter of slab”.

b. At Details 1 and 2, change note at vertical foundation insulation to say, “Rigid insulation, R-10 minimum”.

72. Refer to Drawing Sheet A501 – EXTERIOR DETAILS:

a. At Detail 1, change note at vertical foundation insulation to say, “Rigid insulation, R-10 minimum”.

ATTACHMENTS: ETL 11-18, dated 19 Apr 2011 and Section 13 3450

End of Addendum 01

DEPARTMENT OF THE AIR FORCE

HEADQUARTERS AIR FORCE CIVIL ENGINEER SUPPORT AGENCY

19 APR 2011

APPROVED FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED

FROM: HQ AFCESA/CEO

139 Barnes Drive, Suite 1 Tyndall AFB, FL 32403-5319

SUBJECT: Engineering Technical Letter (ETL) 11-18: Small Arms Range Design and Construction

1. Purpose.

1.1. This ETL provides criteria for the design and construction of Air Force small arms ranges and applies to both new construction and major renovations.

Additionally, this ETL should be used as a guide for any ranges purchased as equipment items. The intent of this ETL is to provide the minimum design criteria necessary for achieving a safe range design. This ETL assumes users have a formal engineering education and background or access to local engineering expertise.

This ETL does not establish the number of firing points, target distance, targetry, or type of range. A planning team composed of major command (MAJCOM) and installation-level combat arms (CA), civil engineering (CE), bioenvironmental engineer (BEE) and safety (SE) personnel will jointly establish the number of firing points, the target distance, and the type of range based on mission, training requirements, and available real estate.

1.2. This ETL is directive in accordance with Air Force instruction (AFI) 32-1023, Designing and Constructing Military Construction Projects, and AFI 36-2226, Combat Arms Program, and must be used by the range designer when designing a new range or renovating an existing range. The range designer has the responsibility to ensure the minimum criteria presented in this ETL are used to provide a safe range design. This ETL may not cover all site-specific concerns and it is the designer’s responsibility to adapt the intent of the ETL criteria to ensure the range is operationally safe. This ETL is not a specification or a prescriptive checklist and is not intended to replace professional judgment by a competent licensed professional engineer, after coordination with the end-user or installation CA section.

Additionally, nothing in this ETL should preclude consideration and use of emerging technologies and commercially available products if these can be proven to result in a safe and satisfactory range design.

1.3. This ETL supersedes ETL 08-11, Small Arms Range Design and Construction.

Note: The use of the name or mark of any specific manufacturer, commercial product, commodity, or service in this ETL does not imply endorsement by the Air Force.

2. Summary of Revisions. This ETL is revised as a result of a 2010 air ventilation survey. The primary change to this ETL eliminates the design of new, fully contained outdoor ranges. The reason for eliminating this option is because controlling air flow within the range is virtually impossible with an open roof over the baffles. With this new ETL only two options remain: fully contained indoor range or non-contained range, for design and major renovation of small arms ranges. Range ventilation performance will also need to be validated prior to final inspection to ensure that proper ventilation is provided within the range. This ETL also allows for expanded use of noise-reduction material to improve occupational exposure to high noise levels.

3. Application: All Air Force installations.

• The criteria in this ETL shall apply to all small arms ranges where the design phase is 35 percent complete or less on the effective date of this ETL.

• New partially contained ranges or fully contained outdoor ranges will not be designed or constructed. If planned major range or component repairs of an existing range will cost more than 50 percent of the estimated range replacement cost (plant replacement value), the entire facility must be upgraded to comply with this ETL.

• The salient safety, health, and environmental features of permanent ranges shall apply to expeditionary or portable ranges; therefore, these ETL standards shall apply to portable ranges purchased as equipment.

• The requirements in this ETL are applicable in OCONUS locations. When conflicts exist between this ETL and host nation requirements, the strictest requirement shall apply.

• After MAJCOM approval, HQ AFSFC/SFXW may approve deviations from the criteria in this ETL. MAJCOMs will submit requests for deviation to HQ AFSFC/SFXW, who will coordinate with HQ AFCESA and AFMSA for review.

3.1. Authority: Air Force policy directive (AFPD) 32-10, Installations and Facilities.

3.2. Effective date: Immediately.

3.3. Intended Users: MAJCOM functional managers; CE; BEE; CA, and range designers for the Air Force.

3.4. Coordination: MAJCOM functional managers and HQ AFSFC/SFXW.

4. Referenced Publications. In some instances, the references listed in paragraphs

4.1 through 4.7 may advocate procedures that seem to contradict those in this ETL. In these cases, the information in this ETL supersedes any other design and construction source. Likewise, policy guidance on range operation and maintenance contained in AFI 36-2226 takes precedence over other sources.

4.1. Public Law:

• Title 29 Code of Federal Regulations (CFR) 1910.1000, Air contaminants, http://www.access.gpo.gov/nara/cfr/waisidx_10/29cfr1910a_10.html

• 29 CFR 1910.1025, Lead, http://www.access.gpo.gov/nara/cfr/waisidx_10/29cfr1910a_10.html

4.2. Department of Defense (DOD):

• DOD Directive (DODD) 5100.76-M, Physical Security of Sensitive

Conventional Arms, Ammunition, and Explosives, http://www.dtic.mil/whs/directives/corres/pdf/510076m.pdf

• DOD Instruction (DODI) 6055.12, Hearing Conservation Program (HCP), http://www.dtic.mil/whs/directives/corres/pdf/605512p.pdf

• Unified Facilities Criteria (UFC) 1-200-01, General Building Requirements, http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

• UFC 3-120-01, Air Force Sign Standard, http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

• UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings, http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

• UFC 4-020-01, DoD Security Engineering Facilities Planning Manual, http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

4.3. Air Force (available at http://www.e-publishing.af.mil):

• AFI 31-101, Integrated Defense (FOUO)

• AFPD 32-10, Installations and Facilities

• AFI 32-1023, Designing and Constructing Military Construction Projects

• AFI 36-2226, Combat Arms Program

• AFI 90-901, Operational Risk Management

• Air Force pamphlet (AFPAM) 90-902, Operational Risk Management (ORM)

Guidelines and Tools

• Air Force Occupational Safety and Health (AFOSH) Standard 48-20, Occupational Noise and Hearing Conservation Program

• Air Force manual (AFMAN) 48-155, Occupational and Environmental Health

Exposure Controls

4.4. Navy:

• Navy and Marine Corps Public Health Center Technical Manual (NMCPHC- TM) IH 6290.10, Indoor Firing Ranges Industrial Hygiene Technical Guide, http://www-nehc.med.navy.mil/Publications_Reports/techmanuals.aspx

• Navy Environmental Health Center, Technical Manual (NEHC-TM) 6290.99- 10 Rev. 1, Indoor Firing Ranges Industrial Hygiene Technical Guide, http://www-nehc.med.navy.mil/downloads/ih/indoor_firing_range.pdf

4.5. Army:

• Army Pamphlet (PAM) 385-63, Range Safety, http://www.apd.army.mil/jw2/xmldemo/p385_63/cover.asp http://www.access.gpo.gov/nara/cfr/waisidx_10/29cfr1910a_10.html� http://www.access.gpo.gov/nara/cfr/waisidx_10/29cfr1910a_10.html� http://www.dtic.mil/whs/directives/corres/pdf/510076m.pdf� http://www.dtic.mil/whs/directives/corres/pdf/605512p.pdf� http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4� http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4� http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4� http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4� http://www.e-publishing.af.mil/� http://www-nehc.med.navy.mil/Publications_Reports/techmanuals.aspx� http://www-nehc.med.navy.mil/downloads/ih/indoor_firing_range.pdf� http://www.apd.army.mil/jw2/xmldemo/p385_63/cover.asp�

• Training Circular (TC) 25-8, Training Ranges, http://armypubs.army.mil/doctrine/tc_1.html

• National Guard Bureau Regulation (NGR) 385-15, Policy and Responsibilities for Inspection, Evaluation and Operation of Army National Guard Indoor Firing Ranges, http://www.ngbpdc.ngb.army.mil/pubs/ARNG%20Series/arngseries.htm

4.6. Environmental Protection Agency (EPA):

• Best Management Practices for Lead at Outdoor Shooting Ranges, http://www.epa.gov/region02/waste/leadshot/

4.7. Industry:

• American Welding Society (AWS) D1.1, Structural Welding Code – Steel, https://www.awspubs.com

• ASTM A514/A514M, Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding, http://www.astm.org

• ASTM C76, Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe, http://www.astm.org

• ASTM C136, Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, http://www.astm.org

• Illuminating Engineering Society of North America (IESNA) Lighting Handbook, http://www.iesna.org/

• American Conference of Governmental Industrial Hygienists (ACGIH), Industrial Ventilation: A Manual of Recommended Practice, 27th Edition, http://www.acgih.org/store/ProductDetail.cfm?id=1913

5. Acronyms and Symbols.

AFCESA - Air Force Civil Engineer Support Agency AFMAN - Air Force manual AFH - Air Force handbook AFI - Air Force instruction AFMSA/SG3PB – Air Force Medical Support Agency, Bioenvironmental Engineering Division AFOSH - Air Force Occupational Safety & Health AFPAM - Air Force pamphlet AFPD - Air Force policy directive AR - abrasion resistant (e.g., AR500 plate) AWS - American Welding Society BCE - base civil engineer BE - bioenvironmental engineering (office) BEE - bioenvironmental engineer BHN - Brinnell Hardness Number BMP - best management practices CA - combat arms http://armypubs.army.mil/doctrine/tc_1.html� http://www.ngbpdc.ngb.army.mil/pubs/ARNG%20Series/arngseries.htm� http://www.epa.gov/region02/waste/leadshot/� https://www.awspubs.com/� http://www.astm.org/� http://www.astm.org/� http://www.astm.org/� http://www.iesna.org/� http://www.acgih.org/store/ProductDetail.cfm?id=1913� cal. - caliber CE - civil engineering CFR - Code of Federal Regulations CMU - concrete masonry unit dBA - decibels (“A” scale) DOD - Department of Defense DODD - Department of Defense Directive DODI - Department of Defense Instruction EOD - explosive ordnance disposal EPA - Environmental Protection Agency ETL - Engineering Technical Letter FOUO - For Official Use Only fpm - feet per minute FRT - fire resistant treated ft - foot HEPA - high-efficiency particulate air (filter) HMMWV - high-mobility multi-purpose wheeled vehicle HQ AFCESA/CEOA - Headquarters Air Force Civil Engineer Support Agency, Engineer and Programs Support Division, Engineer Support Branch HQ AFSFC/SFXW - Headquarters, Air Force Security Forces Center, Combat Arms HVAC - heating, ventilation, and air conditioning IESNA - Illuminating Engineering Society of North America

in. - inch LAW - light anti-tank weapon LR - long rifle m - meter MAJCOM - major command MIL-HDBK - military handbook mm - millimeter mpm - meters per minute NCOIC - noncommissioned officer in charge NEHC - Navy Environmental Health Center NMCPHC - Navy and Marine Corps Public Health Center OCONUS - outside continental United States ORM - operational risk management PEL - permissible exposure limit pH - symbol for logarithm of reciprocal of hydrogen ion concentration in gram atoms per liter PPBE - planning, programming, budgeting, and execution psi - pound per square inch RH - relative humidity RKT HEAT - rocket high-explosive anti-tank SDZ - surface danger zone SE - safety

TACOM-ARDEC - U.S. Army Tank-Automotive and Armaments Command – Armament Research Development and Engineering Center TBD - to be determined TC - Training Circular UFC - Unified Facilities Criteria VDZ - vertical danger zone

6. Definitions.

6.1. Small arms range: A live-fire training facility for training and certifying personnel in the use of handguns, shotguns, rifles up to 7.62mm, rifles or machine guns up to .50 caliber, and the MK-19 40mm machine gun. A small arms range may include special ranges for 40mm grenade launchers, light anti-tank weapons (LAW), and 81mm mortars. Equipment items such as fully (self-) contained portable or expeditionary ranges fall into this category.

6.2. Surface danger zone (SDZ): The portions of the range in the horizontal plane that are endangered by firing a particular weapon. The SDZ includes the area between the firing line and the target line, an impact area, a ricochet trajectory area, and a secondary danger area. The SDZ may also include a weapon back-blast area.

The SDZ must be located completely within the boundaries of U.S. government-owned or -leased properties. A fully contained range which is incapable of allowing a fired projectile to escape its limits does not have an exterior SDZ.

6.3. Vertical danger zone (VDZ): For non-contained and partially contained ranges, the VDZ is the volume of airspace above the SDZ between the ground surface and the maximum ordinate of a direct-fired or ricochet round. The height of the VDZ varies with the weapon and ammunition fired (see Attachment 1). For fully contained ranges, the VDZ is the area between the SDZ and the upper limits of containment.

6.4. Non-contained range (impact range): A non-contained range is an outdoor/open range. The firing line may be covered or uncovered. Direct-fire rounds and ricochets are unimpeded and may fall anywhere within the SDZ. The non-contained range requires an SDZ equal to 100 percent of the maximum range of the most powerful round to be used on the range. This type of range requires the largest amount of real estate to satisfy the SDZ requirements.

6.5. Partially contained range: This range has a covered firing line, side containment, overhead baffles, and a bullet backstop. Direct fire is totally contained by the firing line canopy, side containment, baffles, and bullet trap (no “blue sky” observed from firing positions). Ricochets are not totally contained, but reduced by the baffles and side containment. A partially contained range requires an SDZ length equal to 50 percent of the maximum range of the most powerful round to be used on the range.

A partially contained range will not permit lateral movement along the firing line or movement toward the target line unless the range has the additional baffles required to stop direct fire at the downrange firing lines.

6.6. Fully contained range: Range in which direct fire and ricochets are totally contained within the limits of the range. There is no SDZ requirement outside the limits of the containment.

7. Design Criteria. Range design is based on providing facilities that meet the needs of the training courses of fire specified by HQ AFSFC/SFXW and MAJCOMs based on mission needs. Future range designs must consider courses of fire that may differ from traditional “line-up-and-shoot” courses of fire: certain courses of fire may require the shooter to advance downrange toward the target; other scenarios may include driving a vehicle (HMMWV [“Hummvee”] without pedestal-mounted weapon) into the range to practice vehicle dismount, cover techniques, and target engagement. It is imperative that a range designer fully understand what types of training and courses of fire will take place on the range and design the range accordingly. The designer should also consider design flexibility that allows for changing courses of fire in the future. Facility design and construction must comply with UFC 1-200-01, General Building Requirements.

Air Force ranges will not be designed or constructed to only accommodate frangible ammunition. To ensure operational range safety is not compromised, existing ranges that do not have the required SDZ may restrict the range to frangible ammunition only.

However, this must be a temporary work-around and the owning organization must program corrective action to permit firing of ball ammunition.

The goal of the new Air Force small arms training philosophy is to increase the current 25-meter standard target distance and expand the diversity of training that can be accomplished on the range. Ranges should be designed to allow the greatest target distance possible within the available land at the site (e.g., 50 meters, 100 meters, 300 meters, 1000 meters). The desired target distance is at or as close as possible to the sight zero distance for the weapon.

Base and MAJCOM CA, CE, BE, and SE offices will jointly develop site-specific designs using the minimum criteria outlined in this ETL. MAJCOMs may submit designs that deviate from the requirements of this ETL to HQ AFSFC/SFXW for review. HQ AFSFC/SFXW will coordinate with HQ AFCESA/CEOA, Engineer Support Branch, and AFMSA/SG3PB, Bioenvironmental Engineering Division, for review. Submit designs to HQ AFSFC only after MAJCOM approval. Individual MAJCOMs may establish design criteria exceeding the minimums specified in this ETL.

7.1. Range Types, Combination Ranges, Range Configuration, Site Selection, and Range Geometric Design.

7.1.1. Range Types.

7.1.1.1. Non-contained Range (Impact Range). The non-contained range accommodates the controlled and supervised discharge of weapons and has sufficient land area to ensure the discharged projectile does not exit the SDZ.

The trajectory of the projectile is along the line of fire (orientation of the range) and the impact of the projectile is designed to be within the limits of the impact area. The firing line may be covered or uncovered. Typically, there are no overhead baffles, but surface barriers or sidewalls may be provided to partially limit projectile trajectory. A non-contained range must have the land area to accommodate both the full SDZ and the full VDZ. Ammunition used on the range will establish the required length of the SDZ and the required height of the VDZ. SDZ length must be equal to the longest distance equal to 100 percent of the extreme range for the types of ammunition used on the range. The required SDZ must equal or exceed the minimum SDZ lengths listed in Table 1. For minimum VDZ height requirements, see Attachment 1.

Table 1. Minimum SDZ Distance Requirements for Small Arms Ammunition —

Non-contained Range

Weapon/Caliber Ammunition Minimum SDZ Length Meters (Feet)

Handgun, 9mm pistol Submachine gun, 9mm M882 1840 (6036)

Handgun, 9mm pistol Frangible, lead-free, Winchester AA16 1584 (5196)

Handgun, .44 magnum Commercial local purchase 2290 (7513) Shotgun, 12 gauge 00 buckshot 600 (1968) Rifle, 5.56mm Ball M193; tracer M196…