Appendices 1-4.pdf

MacDill AFB General Design Guidelines

For Facility Construction and Renovation

Table of Contents Page

I Architecture …………………………………………............................................ 2–8 General………………………………………………................................. 2-3 New Construction………………………………….................................... 3-4 Wall Surface Treatment………………………………. ………………….. 4 Window and Door Frames………………………………………………… 4-5 Entrance and Doors………………………………………………………... 5 Roofs…………………………………………………………………… HVAC Equipment…………………………………………………………. 7 General levels of improvement for existing buildings…………………….. 7-8

II Landscape………………………………………………………………………….. 8-9

III Mechanical (HVAC)………………………………………………………………. 10-12

IV EMCS (Energy Management Control System)………………………………..... 12-13

V Civil…………………………………………………................................................. 12-17 General………………………………………………………………………. 13 Roads and Parking Lots……………………………………………………... 13 Sanitary Sewer System………………………………………………………. 13-14 Lift Stations………………………………………………………………….. 14-15 Water Distribution System…………………………....……………………… 15-16 Gas Distribution System……………………………....................................... 16-17 Strom water………………………………………………………………….. 17

VI Electrical…………………………………………………………………………… 18-21

VII Communications…………………………………………………………………… 21

VIII Security Police……………………………………………………………………... 21-22

IX Safety………………………………………………………………………………. 22-23

X General Bioenvironmental Engineering Requirements………………………… 24

XI Emergency Medical Service……………………………………………………… 24

XII Base Environmental……………………………………………………………… 24-27

XIII GIS As-Built Requirements……………………………………………………… 27-29

Appendix………………………………………………………………………………… 30-33

UFC Reference…………………………………………………………………………… 30 Historic Buildings………………………………………………………………………... 31 EMCS Monitoring Points (General)……………………………………………………. 32-33

MacDill AFB General Design Guidelines

June 2008

I. ARCHITECTURE:

Refer to MacDill AFB Architectural Compatibility Design Guideline for Details/specifics (In development).

A. GENERAL

1. Colors: refer to the base ACP color scheme for exterior building colors (i.e. 2 colors:

one base color and one color for roof and trim.) All colors, interior and exterior, must be submitted for Government approval.

2. All utilities are to be placed underground where feasible.

3. Existing Utilities: All sites requiring digging or other subsurface work should be checked using ground penetrating radar (GPR) to verify depth and location of existing utilities and other underground structures and foundations. GPR identified anomalies not identifiable on as-built utility drawings should be exposed for verification as part of the site survey.

Base utility drawings have been found to sometimes be incomplete and inaccurate.

4. Finishes: Use low maintenance materials. Do not install porous or pitted surfaces which encourage the growth of mold and mildew.

5. Wall Construction (as a minimum) for “1 HR Fire Rating”:

a. Use one layer of 5/8” type x gypsum wall board or veneer base nailed or screwed to each side of 2”x 4” wood or metal studs 16” on center with 6d coated or 1 1/4” drywall screws 7” on center stagger joints 24” on each side or

b. Use one layer of 1/2” type x veneer base nailed to each side of 2”x 4” wood or metal studs 16” on center with 5d coated or 1” drywall screws 8” on center with a minimum of 3/32” gypsum veneer plaster.

6. Ensure all surfaces, metal, wood, plastic, etc are primed prior to final painting (2 coats) for added resistance against corrosion and improved adhesion. Also ensure all paint contains an additive to resist mildew.

7. For new parking lots, berms or landscaping should be implemented to conceal the parking lot from the main road. The A-E should apply what is most practical, (native and base approved) (low water consumption), applicable and aesthetically pleasing to the area.

8. Follow ADA, UFAS, NFPA and IBC standards. For design purposes, use 120 MPH for wind loads.

9. Existing Buildings:

a. Representative examples of period architecture should be preserved and used.

b. Rehabilitate and maintain buildings in a manner consistent with the original character. Where possible, eliminate incompatible appendages, such as exterior stairs, awnings and canopies that were not part of the original structures.

c. Limit size of new additions to be in scale with original building.

d. Avoid alterations that detract from the design integrity of a building or that impact negativity on adjacent buildings.

e. When possible, locate additions to form spaces, develop views, screen poor views, etc. as described under guidelines for new construction.

f. Locate additions to minimize intrusions on character defining features such as massing, rhythm, setbacks, elevations, rooflines, primary entrances.

g. When appropriate, match original materials and construction techniques where structural and decorative elements of the building façade need repair or replacement.

h. Clean and repair exposed and visible surfaces. Paint only materials that were originally painted, such as fascias, cornices, trims, doors. Do not paint concrete, copper, brass, glass, brick, stone and slate.

i. Remove where possible, all extraneous elements (such as utility lines, support brackets, pipes and vents), that detract from the building facades. When this is not possible, paint an appropriate color to minimize visual impact.

j. Locate equipment (such as transformers, HVAC apparatus, telephone cabinets, dumpsters) in areas where they will have minimum detrimental effect on the appearance of existing structures. Provide screening where necessary.

10. NEW CONSTRUCTION:

a. Exteriors of new buildings shall be split-faced CMU, stucco or a combination of the two. Thought must be given to match surrounding areas. When appropriate, select material, finishes and details to be consistent and compatible with existing materials, finishes and details in their respective districts.

b. When appropriate, make new buildings compatible in style, scale, proportion, orientation and directional emphasis with existing structures in their respective districts.

c. Locate new structures to visually define space, to reinforce spatial enclosure, create vistas, frame views, and guide the eye to landmarks.

d. Avoid intrusions into positive open spaces, such as parades.

e. All facilities that use AF AMC custodial contracts will have the toilet accessories provided by the custodial services contractor. (Jumbo J.R.T. toilet paper holder, paper towel dispensers, and soap dispensers) These accessories are to be installed by the construction contractor and the mounting locations need to be reinforced to ensure each installation is secure. POC for this service (Cesar Madina @ Medina, Cesar A Civ USAF AMC 6 CES/CEQ) All other facilities that do not use AF AMC custodial contacts will need to provide toilet accessories in the construction contract.

B. WALL SURFACE TREATMENT

1. Existing Buildings:

a. Clean brick, stone, wood and metal surfaces by appropriate method. Investigate alternatives and choose the least harmful cleaning method. Never sandblast old brick, stone or wood surfaces.

b. Repair walls, where necessary, by removing loose material and patching holes and cracks with new material to match adjoining surfaces.

c. Repair joints in masonry walls by pointing. Joints should be raked tooled, struck or otherwise treated to match original joint techniques.

d. Avoid cosmetic application of new synthetic materials resembling original materials; such materials will not weather and age the same as existing natural materials. When new synthetic materials must be used, avoid combining with existing materials to achieve resemblance with original appearance.

2. New Construction:

a. Use split face CMU and/or stucco as a unifying material in all districts, if suitable as exterior cladding for a particular new structure. Match colors in the tan or buff range.

b. Match new surfaces with existing ones in size, texture, color and use the same bonding patterns.

C. WINDOW AND WINDOW FRAMES

1. Existing Buildings: (Must meet current UFC and AT/FP guide lines)

a. When appropriate restore or replace existing windows to match original design as closely as possible.

b. Avoid exterior bars, wire mesh, and other unsightly security devices on windows.

c. Avoid partial infill of window openings in existing structures to accommodate standard or stock window units.

d. Avoid filling or boarding up window openings. Where vision must be obscured, provide an opaque surface inside, separated from the glass; do not paint window panes. Where window openings must be closed, remove sills and frames and fill opening with material matching adjacent surfaces.

e. Weatherize windows to reduce or prevent outside air infiltration.

2. New Construction: (Must meet current UFC and AT/FP guide lines)

a. When appropriate, place window openings in a rhythm that is in harmony and compatible with the fenestration in existing buildings.

b. Provide contemporary window style on facades of new buildings.

c. Maintain a regular ordered pattern of fenestration.

D. ENTRANCES AND DOORS

1. Keep doors in style, material, and character compatible with existing structures.

2. Remove and avoid construction of canopies that are not compatible with the original entrance design.

3. Avoid filling door openings in the building facades with plywood, wood slats, or masonry. Where door openings must be closed, remove lintel and frames entirely and fill opening with material matching adjacent surfaces.

4. Avoid partial infill of door openings in existing structures to accommodate standard or stock doors.

5. Use 16 gauge galvanized sheet metal or storefronts for all exterior doors.

6. The base has implemented a standardized lock system (Best Locks: 7-pin system.) Please insure that all new locks are compatible with this system. (Locks and cores’ will be purchased and installed by the contractor. The contractor will install lockable “construction cores” to be used during construction. After the building has been accepted by the base, the base lock smith will remove the construction cores and then install the Best, or compatible, cores which have been provided under the construction project contract. All construction cores will be turned over to the USACE.)

7. The base will receive (2) keys and (3) blank keys per lock.

8. On existing doors, install weather stripping and caulking to reduce or prevent outside air infiltration.

9. New Construction:

a. Provide entrances and doorways in scale and character compatible with buildings. Use store front type construction with side lights and transom glass if designed to be compatible with the character of surrounding buildings.

b. Design all entrances, particularly main entrances to buildings to be easily perceived. Entry porticoes are strongly encouraged.

E. ROOFS

1. Roof penetrations shall be kept to a minimum. No equipment (electrical, mechanical, communication, etc.) shall be mounted on roofs due to roof leaks and ease of accessibility and maintainability.

2. Existing Buildings:

a. Do not place mechanical equipment, such as cooling towers and heat pumps, on sloped roofs. Locate essential roof ventilators, pipe, vents and stacks so as to minimize visual impact on buildings. Install such equipment as an integral part of structures.

b. Provide screening for equipment on flat roofs of existing structures. Select finish material and color to harmonize with the rest of the building.

c. Place antennas in inconspicuous locations.

3. New Construction:

a. Provide new roofs in pitch, material, color and texture similar to existing roofs in appropriate districts. (The base standard for new roofs is Standing Seam Metal Roofs. However, this rule is not applied in all districts.)

b. The use of sloped roof forms is recommended. Minimum roof slope should be 3:12 – 5-12. Refer to guidelines in the Base Architectural Compatibility Standards for specific requirements for each visual district.

c. Standing Seam Metal Roofs shall be fastened with concealed clips with a 20 year warranty on steel and aluminum panels.

d. For installation of roofs, especially for new buildings, utilize a simple roof line.

Numerous problems have occurred in the past which have been associated with elaborate roof lines.

e. Provide permanent access to roofs by exterior ladder, interior stairs or access doors with pull down ladders.

f. Do not place mechanical equipment on roofs of new structures. Provide appropriate screening for essential equipment.

g. Place roof ventilators, vent pipes, and antenna in locations that are as inconspicuous as possible.

h. Auxiliary structures on roofs, such as chimneys, elevator penthouses, water tanks should always be designed to be an integral part of the building and to harmonize with the rest of the structure.

F. HVAC EQUIPMENT

1. Existing Structures:

a. Avoid placement of window air conditioning units on the facades of buildings in the Campus District. Where air conditioning equipment is required, a central system should be installed.

b. Avoid placing HVAC equipment (heat pumps, cooling towers, etc.) outside of existing structures. Where such equipment must remain, shall be screened from view, but not to restrict air flow. Screen walls must meet ACP requirements.

Hose bib and receptacle are required in screened mechanical yards for future maintenance by base support shops.

2. New Structures:

a. Avoid installation of HVAC or other utility equipment such as transformers, telephone cabinets, on the exterior of new structures. Install such equipment in a mechanical room. Where required on facades, they should be simple in design and finished to match adjoining surfaces.

G. GENERAL LEVELS OF IMPROVEMENT FOR EXISTING BUILDINGS.

1. It is recognized that achievement of stated design objectives will not always be completely possible in degree of visibility, use, or importance. According, to allow for flexibility in implementation, three levels of improvement are proposed for existing buildings.

a. These are:

i. Painting and/or renovation of existing finishes

ii. Changing existing cladding material and/or revisions to existing doors and windows

iii. Alteration of building form/style or revision to existing doors and windows

2. While the highest level of improvement may be the ultimate objective, a lower level of implementation is preferable to be partially attained. Implementation of the highest improvement level may cost more initially but may be worth the expense if reduced maintenance and energy consumption can be obtained (use life cycle cost analysis per the Energy Policy Act 2005).

a. Level 1 Improvements typically consist of maintaining existing cladding materials but using a more compatible color scheme in the future. This would add at least one element of the Base/District unifying characteristics and help in achieving some degree of visual coherence.

b. Level 2 Improvements would typically consist of the following improvements:

i. Changing the existing cladding material to ACP compatible material.

Besides improved appearance, the new material could be more permanent providing extended period of maintenance cost benefit and can also accommodate energy saving measures. Windows and doors could be replaced to further enhance energy conservation and make it more compatible in overall appearance and materials. Also, exterior appurtenances such as HVAC equipment or antenna would be screened or removed. Careful consideration must be given to the screening of HVAC equipment so as not to create a short cycling of condenser air circulation.

c. Level 3 Improvements involve major alterations to the building form and style and makes them compatible with recommended architectural, ACP characteristics and achieves the benefits as stated earlier. The following alterations are recommended.

i. Change flat roof to pitched hipped roof with large overhangs.

ii. Add entry portico compatible with pitched roof.

iii. Horizontal treatment of new windows and materials.

iv. Resurfacing with more permanent and compatible materials.

v. Provide new casement windows.

3. Not all Level 3 Improvements are appropriate to each district.

II. LANDSCAPE ARCHITECTURE:

A. Refer to the “MacDill AFB Architectural Compatibility Plan” (ACP) for landscaping requirements at MacDill AFB

UFC 4-010-01, page B-7

B-1.2 Standard 2. Unobstructed Space. It is assumed that aggressors will not attempt to place explosive devices in areas near buildings where these explosive devices could be visually detected by building occupants observing the area around the building. Therefore, ensure that obstructions within 10 meters (33 feet) of inhabited buildings or portions thereof do not allow for concealment from observation of explosive devices 150 mm (6 inches) or greater in height. This does not preclude the placement of site furnishings or plantings around buildings. It only requires conditions such that any explosive devices placed in that space would be observable by building occupants.

For existing buildings where the standoff distances for parking and roadways have been established at less than 10 meters (33 feet) in accordance with paragraph B-1.1.2.2, the unobstructed space may be reduced to be equivalent to that distance.

At the heart of the issue is "conditions such that any explosive devices placed in that spaced would be observable by building occupants".

B. Plantings grow and should not allow for the concealment of explosive devices today, tomorrow or three years from now. Plants should be selected that would allow quick visual detection of a device. Remember everything around a facility becomes part of the blast when it occurs. Plant selection takes into account a variety of elements.

1. See the list of plants suitable for MacDill AFB compiled as part of the ACP.

2. The Florida Cooperative Extension Service (Univ. of Fla.) publications Web site:

http://edis.ifas.ufl.edu/TOPIC_Landscape_Plants is a good source of information for landscaping in Florida.

3. White House memorandum #W50737 (dated 26 Apr 94) mandates the use of regionally native plants at federal installations. Exotic species are not authorized.

4. Plants must be tolerant and capable of withstanding the full range of potential climate conditions located in south, central Florida.

5. Select plants that require little or no maintenance (trimming/shaping).

6. Consider the sun and shade conditions where each plant is to live—most plants have very specific sun/shade requirements.

7. Poisonous plants and plants with thorns are not authorized in Military Family Housing areas.

8. Take into account the plant’s mature size.

C. Soil quality is fairly consistent across the base. It is very sandy, which means excellent drainage and little organic content. Remember that shoreline areas have increased soil salinity and saltwater spray.

D. An automatic irrigation system is highly recommended for any landscaping. Use controllers and spray heads compatible with and approved by the MacDill AFB.

E. Shredded cypress mulch is normally installed in a three-inch layer in all plant beds, except in certain areas near the flight line because of FOD (Foreign Object Debris.) Coordinate with Airfield Operations.

F. Mowing strips installed around new construction should be concrete.

G. Grasses

1. Argentine Bahia grass: (Preferred unless stated otherwise)

a. Excellent drought tolerance.

b. Requires little/no maintenance after it is established.

2. St. Augustine grass:

a. Requires irrigation.

b. Highly sensitive to salt.

III. MECHANICAL (HVAC)

A. There has to be network connections in HVAC mechanical room for EMCS controls. All of our HVAC units are controlled from a central location. As a result, they have to be connected to the LAN. As well, the HVAC units have to have connections to the Fire Alarm system (i.e. the Fire Department.) Ensure that space is available for alarm panel connections.

B. Avoid placing HVAC units and any other mechanical equipment on-top of roofs (i.e. no penetrations through roofs.) due to problems with roof leaks and accessibility and maintainability requirements. If rooftop equipment is necessary, use existing roof warranty holder to perform the work, if applicable.

C. All HVAC equipment, such as air handler units, VAV boxes, air terminals, etc. should be accessible for maintenance via removable ceiling tiles or access panels. Access points should be located and large enough to allow for filter replacement. Etc.

D. Place all utilities underground if possible, especially laterals to buildings.

E. Observe ASHRAE Std. 62-2007. Ensure buildings maintain a positive air pressure at all times.

Air handlers should be cleanable and accessible for proper maintenance. All ductwork, supply and return, should be constructed of material that is cleanable. No internal insulation.

F. Corrosion of outdoor air cooled air conditioning equipment: Provide either copper fin/tube or aluminum fin with factory or field coating. Unprotected aluminum fins usually corrode within 350 hours of operation.

G. Equipment Preference: Engineers have a tendency of specifying units based on cost, size, and efficiency. Make sure durability, availability of replacement parts in the local area, maintainability, type of warranty, and service from the local manufacturing representatives are taken into consideration. Prefer McQuay, Carrier or Trane for HVAC.

H. Humidity Control: Maintain space humidity at 50% +/- 10% unless stated otherwise by building user.

I. Building pressurization of approximately 10% greater than the exhaust volume is recommended to offset infiltration.

J. Provide proper specifications for air filters to ensure indoor air quality requirements are met.

K. Verify that existing space is sufficient to properly route ductwork (i.e. ceiling plenums and chases), and piping.

L. Install isolation valves for all equipment and proper air venting for all piping systems as required.

M. Use double wall, insulated air handling units.

N. Use heat recovery wheel or heat pipe to pre-treat ventilation air when feasible (perform LCCA as documentation of this analysis).

O. Verify that size and connection methods are compatible with existing systems.

P. Include vibration isolation on all supply/exhaust fans, energy recovery units and when needed elsewhere.

Q. A-E shall thoroughly coordinate mechanical and electrical coordination between sheets for motor sizing and electrical loads.

R. Use double-walled, pre-insulated pipe for buried, chilled water piping between the mechanical room and the chiller.

S. Obtain permits for Air pollution emissions for boiler and incinerator installation.

T. Install a sufficient number of volume dampers to allow a constant volume system to be balanced as required.

U. Use a four pipe system with provisions for heat recovery on HVAC condensers for pre-heating hot water when cost effective (LCCA).

V. Toilet room areas should be properly ventilated per the International Mechanical Code (75cfm/water closet or urinal), ASHRAE (70 cfm/person), or maximum volume (2cfm/sqft), whichever is greatest. Locker rooms and janitor closet should be exhausted at 0.5 cfm/sqft.

W. All building automation controls are to be DDC type No pneumatic controls are to be used.

X. All dorm designs shall comply with ETL 93-2 Dorm Design in Humid Areas.

Y. To meet SMACNA recommendations the designer should indicate the operating pressure in the various elements of the duct system on the plans.

Z. The duct aspect ratio should be keep as low as possible to reduce duct cost.

AA. Seal duct to SMACNA high and low pressure duct construction. This will add approximately 5% of ductwork first cost. If the designer eliminates the sealing of an average low pressure duct system, he must make and allowance in his calculations for a minimum of 15% duct leakage.

BB.IBC or FL State Building Code states rooms containing boilers, central heating plant or hot water supply boilers shall have a one hour rated separation. Exception is where the large piece of fuel equipment does not exceed 400,000 BTU/hr.

CC.Verify that the expansion tank is on suction side of circulation pumps.

DD. Heating systems use 50% by volume Ethylene Glycol.

EE. All exterior equipment shall be concealed to improve facility aesthetics while still providing ease in access for maintenance and repair.

FF. All utilities shall be placed underground where feasible.

GG. Energy Conservation: ASHRAE 90.1A as Energy Standard for equipment efficiency.

1. Specify minimum chiller/condensing unit efficiencies consistent with equipment that is at or near the top of industry standards.

2. Use waste heat recovery in all application where a payback will occur within the life of the plant, particularly where dehumidification is required.

3. Energy performance must meet or exceed the requirement of Energy Technical letter 94- 4, Energy Usage Criteria for Facilities in the Military Construction Program.

Additionally Energy performance must meet the Energy Policy Act of 2005 (LCCA exceed ASHRAE 90.1 by 30%).

4. Use premium efficiency rating for all motor’s .

5. Use variable speed fans and pumps unless other alternative provide a lower life-cycle-cost or special system constraint require constant speed equipment.

6. Base does not use waterless urinals.

IV. EMCS (Energy Management Control System):

The base Civil Engineering Energy Management Control System section controls all HVAC systems.

Therefore, it is imperative that any system installed be compatible with the existing system so that the EMCS section will have control. As stated in the HVAC in the HVAC section, 2 phone lines & one LAN connection have to be run to the mechanical room to all control of the unit(s). Building controls communication must be LON talk capable.

A. System type. Only one manufacturer and type shall be used in each facility.

1. For new construction, system type must be one of the following:

a. Carrier

b. Tekplan (Invensys)

c. Trane.

No other type will be accepted.

2. For facilities with an existing DDC system of the type mentioned above, new equipment must be the same manufacturer and type as existing and interconnected. Alternatively, the existing system may be entirely replaced with a new system of acceptable type. All points that are monitored and controlled by the existing system shall be present on the new system. All existing DDC parts, including panels, sensors, actuators, etc. that are removed shall be returned to the Government.

B. Communication:

1. Communication between the DDC main panel and the central console in the Energy Management Section (Building 247) shall be via a LAN connection. A CAT5 line will be installed from the EMCS main control panel to the closest COM room for communication to building 247.

C. Graphics: Provide dynamic graphic displays for use on the central console in the Energy Management Section (Building 247).

1. Provide a main graphic for the overall building that displays floor temperatures, outside air temp/humidity, and other general information. The main graphic shall also contain links to other graphic screens for individual systems.

2. Provide a dynamic point for each system component (i.e. air handling units, chiller plants, boilers etc. All inputs and outputs for each component shall be displayed on the graphic. Each graphic shall contain links to the main graphic and other related graphics.

D. Accessibility: Specification must contain a statement that requires that: All DDC field panels, subpanels, microcontrollers, etc. must be completely programmable through the central console in Building 247 via the LAN. There shall be no devices that contain features that can only be accessed in the field with special equipment or connectors.

E. Points to monitor/control. See Attachment #2 for general points to consider for monitoring.

Additional points may be needed for each specific project. For example, a system with an emergency generator may have certain chillers interlocked.

V. CIVIL

A. GENERAL

1. Prior to any civil construction or hand digging, an AF Form 103 shall be completed and all base utilities shall have been marked by the Base CE Shops and Utility Companies.

2. Hand digging to locate utilities shall be mandatory. These utility locations shall be left uncovered until that portion of the installation is beyond that particular utility location and the construction inspector has observed the intersection of the conflicting utilities, and approves continuation of the installation.

B. ROADS AND PARKING LOTS

1. Use FDOT Standard Specifications for Road and Bridge Construction (FDOT Specifications) and the FDOT Roadway and Traffic Design Standards (FDOT Indexes).

2. Curbs: Install Miami Type curbs, FDOT Type-F or FDOT Type-D curbs as applicable to meet field conditions.

3. Utility crossings: All utility crossing shall be installed using jack-and-bore or by directional bore. If an open cut is approved they compaction shall be in accordance with FDOT Specification. Base material shall be replaced 2-times the original thickness or 12-inched whichever is greater.

4. Repair sidewalks between contraction / expansion joints only. No narrow cuts across sidewalks will be accepted.

5. New sidewalks shall be constructed in accordance with FDOT Index 310.

C. SANITARY SEWER SYSTEM

The sanitary sewer specification provided below is the basic standard. For complete design and construction standards use the latest edition of Hillsborough County Water, Wastewater, and Reclaimed Water Technical and specification all wastewater collection and transmission system design and construction. New Lift Station drawings shall use the Hillsborough County’s 24” by 36” standard detail sheet, signed and sealed by the Engineer of Record.

SANITARY SEWER COLLECTION SYSTEM

1. All gravity piping 4-inch to 15-inch in diameter shall be PVC, ASTM D3034, SDR 35 or better and the color shall be green.

2. The depth of cover force mains, gravity mains and laterals shall not be less than 36-inches.

3. Wastewater gravity /force mains shall maintain FDOH horizontal and vertical separation from water mains.

4. Slopes for all gravity sewer lines shall be laid at slopes that produce a flow of not less than 2.0 FPS or greater than 5 FPS. Use the “Recommended Standards for Sewage Works” as a guide. Lines shall be sized to accommodate peak flow when flowing ½ full.

The minimum sewer main size shall 8-inches in diameter.

5. Installation of PVC pipe shall be in accordance with ASTM 2321. Where PVC enters a manhole, a suitable manhole coupler or flexible manhole connector to provide a water tight connection shall be installed in manhole wall.

6. All manholes shall be 4 ft. diameter polyethylene lined pre-cast concrete per ASTM C478. Minimum wall thickness shall be of 5-inches. The Sub-Contractor may submit an alternate of fiberglass unit rated for H-20 loading. Minimum manhole access of 22-inches is required. Maximum distance between manholes shall be 400-feet.

7. Manhole covers shall be absolutely level with the pavement, and or concrete, and 2 inches above the final finished surface, in grassy areas.

8. All manholes shall be cast iron and have the word "sewer” marked in each cover.

9. All service laterals shall be at least 4 inches diameter and shall have a surface (flush with the ground) clean-out made of PVC bell and spigot. The cleanout shall be encased with an 18-inch square or round by 6-inches thick collar.

10. All service laterals connecting to the collection lines shall have gasket "wyed" fittings made of PVC, which will be held in place with stainless steel bands.

11. The minimum size force mains shall be 4 inches. Force mains 4-inch to 12-inch shall meet ASTM 2241 SDR 2. Force main fittings for PVC shall be ductile iron fittings, minimum pressure rating of 250 psi and conform to requirements of ANSI/AWWA Standard C110/A21.10 and A21.4.

12. Restrained joints for PVC pipe shall be designed and approved by Engineer of Record and shall be Uni-Flange or approved equal.

13. Provide metallic tape above all sewer line and force main routes. . Include #10 locator wire along side of pipe. Wire to be brought to grade at valve boxes.

LIFT STATIONS

1. Lift stations shall have an inside diameter of at least 4 feet and conform to the requirements of ASTM C478. Alternate fiberglass wet-well shall be submitted for approval. The interior of concrete wet-wells and underside of top slab shall be lined with an integrally cast-in-place semi-rigid polyvinyl chloride plastic sheet lining..

2. All stations shall include a 4-inch emergency cam-lock by-pass capable of pumping the station effluent during power outages, and to allow maintenance and repair of the lift station equipment.

3. All electronic controls shall follow Hillsborough County Standards for control panels Control panels shall be stainless steel NEMA 3S.

4. All control panels shall be mounted outside the lift station on 4x4 concrete posts. Include 6” concrete slab around control panels

5. Prior to the construction of all lift stations there will be a manhole constructed not more than 20 feet from the influent side of the station.

6. All force mains shall be fitted with a pressure assembly (diaphragm) gauges to measure head loss and volume from the station.

7. Provide a 1 inch hose-bib assembly for wash down water at each lift station. Provide anti-siphoning device on hose bibs

8. Check valves shall conform to AWWA standard C-508 and outside lever weight operated, swing non-slam type, and equipped with removable inspection cover.

9. Gate valves shall be resilient seat type meeting the requirements of AWWA C500 and C509 with non-rising stem and 2-inch square operating nut. Valves shall include all risers and concrete pads with bronze disk valve labels.

10. All pumps shall be Barnes submersible units with oil encased motors, on stainless steel slide rails. The pumps shall be mounted so that no base personnel will be required to enter the wet well of the lift station. All pumps shall be connected and uncoupled automatically with stainless steel cable from above the wet well. Pumps over 3 HP shall have an integral mechanical seal failure unit with indicator light on the control panel.

11. All pump discharge piping and fittings shall be #125 flanged Ductile Iron pipe supported by 316L stainless steel brackets. All fittings interior and exterior to the wet-well shall be corrosion coated.

12. All control cables hooks and pump lift cables shall be 316L stainless steel.

13. Access hatches must be minimum of 34-inch by 54-inch with double doors for duplex stations and have 150 PSF load rating. Hatches shall be Halliday or approved equal.

14. All new wet well installations shall include a separate valve vault for emergency by-pass and lift station control valves.

D. WATER DISTRIBUTION SYSTEM

1. All waterlines (12 inches or less) shall be fabricated from PVC C-900, DR18 or DIP Class 52 or better cement lined bell and spigot pipe.

2. All PVC water line material shall be blue and DIP water main shall be wrapped with blue tape.

3. Waterlines over 12 inches in diameter shall be fabricated from high density polyethylene 1000 series or PVC C-900 DR18 bell and spigot pipe.

4. Provide Fire hydrant assemblies for every 300 to 500 ft of new water main

5. All mechanical joint bends used on water mains of 4 inch and larger, shall be restrained using restrained fittings or concrete thrust blocks.

6. Provide metallic tape above all water distribution line routes. Include #10 insulated copper locator wire above the pipe. Wire to be brought to grade at valve boxes and hydrants.

7. Provide chlorination, and independent testing of water samples for newly installed water mains and service piping, in accordance with the Florida Department of Environmental Protection (FDEP) regulations F.A.C. Chapter 62-555. Sampling and testing shall be performed by a Florida certified laboratory qualified to perform water testing.

8. Provide a minimum cover of 3 feet from finished grade to the top of the pipe unless otherwise specified.

9. Provide fire hydrants every at every 300 to 500 feet or as called for by the base fire department.

10. Provide 3/4, 1, 1 1/2, or 2 inch polyethylene or PVC pipe (rated for 160 psi), for all service laterals.

11. For service lateral provide a corporation stop at the main and a shut off valve box at the edge of the curb or about 5-feet outside of the facility served.

12. For service lines requiring back flow prevention, reduced pressure double check valve assemblies shall be used All back flow piping shall follow local codes and manufacturer’s recommendations. The fittings shall be restrained using flanged pipe, restrained fitting and/or concrete thrust blocks.

13. All temporary water connections require back flow prevention. Contractors are required to contact and coordinated connection points with Base CE Plumbing Shop.

14. When a pressure assisted system is designed to be installed in a project, then a bag filter system needs to be installed to protect the pressure regulator and check valve assembly.

15. Buildings greater than 50,000 SF use an advanced water meter connected to the EMCS system. For buildings less than 35,000 perform an LCCA to determine if an advanced meter is required otherwise use a standard water meter if not justified by LCCA. Advanced meter must provide a 15 minute incremental usage profile. This applies to existing facilities only. All new facilities and renovation projects over $200K will have advanced meters installed.

E. GAS DISTRIBUTION SYSTEM

Madill AFB owns and maintains gas lines located on base.

1. All piping used for installing, repairing, or providing new laterals shall be polyethylene pipe. Transition fittings to black iron pipe or metal pipe sleeves will be used when road crossings are made.

2. Prior to any construction, hand digging to locate utilities shall be mandatory. These utility locations shall be left uncovered until that portion of the installation is beyond that particular utility location and the construction inspector has observed the intersection of the conflicting utilities, and approves continuation of the installation.

3. All connections made by heat fusion shall be made by a certified technician (in writing), by the manufacturer of the specific pipe being used. The technician shall carry proof of competency that is no more than 3 years old. Mechanical connections or slip fittings submittals shall be reviewed by the contracting officer.

4. Meters shall be installed at least 6 inches above a 2 inch concrete slab that is 6 inches longer than each side of the meter. Valves shall be placed on each side of the meter to allow the meter to be removed. A by-pass shall allow the gas to provide continuous service to customers when the meter is being repaired. A chain link fence (4 feet high) shall be installed around the meter or steel pipe (minimum of 4-feet high above grade and a minimum of 2-feet below grade). Bollards shall be at least 3-inches in diameter and filled with cement.

5. A primary regulator with a minimum inlet pressure of 10 psi on the supply side and less than 22 WCI (water column inches) going into the residence.

6. Service laterals shall use transition fittings of fused polyethylene to galvanized pipe, as the pipe riser goes from the underground pipe (PE) to the building.

7. All distribution systems mains, service lines, meter installations, and regulator stations shall be constructed in accordance with federal safety standards established by Title 49 CODE OF FEDERAL REGULATIONS, part 192.

8. Provide metallic tape above all natural gas distribution line routes include #10 insulated locator wire along side of pipe. Wire to be brought to grade at valve boxes.

9. Provide a minimum cover of 3 feet from the top of the pipe unless otherwise specified

10. Rockwell polyethylene (PE) valves shall be used for all PE pipe, and stainless steel ball valves shall be used with galvanic insulators, on black iron pipe.

11. Buildings 50,000 SF or larger use an advanced meter connected to the EMCS. Buildings less than 50,000 AF perform an LCCA to determine if an advanced meter is required.

The advanced meter must provide usage profiles of 15 minute increments as a minimum;

this applies to existing facilities only. All new facilities and renovation projects over $200K will have advanced meters installed.

F. STORM WATER SYSTEM

1. Pipe shall be concrete Class III or ribbed polyethylene 1000 series designed for traffic loading (H-20).

2. Manholes and drainage structures shall be manufactured in accordance with FDOT Indexes.

3. All manhole covers shall be cast iron and have the word “STORM” marked in each cover.

4. Provide a minimum cover of 3 feet from the top of the pipe unless otherwise specified.

5. Storm system piping shall be sized using the rational method using the FDOT “Rainfall Intensity-Duration-Frequency Curves” for Zone 6 or SCS Method all for a 5-yr/24hr return period storm event.

VI. ELECTRICAL

A. General: All general electrical work will be in accordance with the current edition of the National Electric Code and the National Electrical Safety Code. For high voltage overhead and underground lines, follow TECO (local power company) Construction Specifications and AMC ETL 07-1 Design Criteria for Underground Electrical Distribution Systems Using Directional Boring (DB) Methods for Installing High Density Polyethylene Electrical (HDPE) Conduit. All roadways and paved areas will be bored. No paved areas will be cut and trenched to install electrical or communication lines.

B. All medium- and high-voltage cable insulation shall be EPR

C. All terminations shall be cold shrink or heat shrink type terminations. Molded, porcelain and tape terminations are not acceptable.

D. Service Entrance: New service entrances shall be underground in conduit. 600-volts and below may be in direct buried conduit. All new service transformers shall be pad mounted..

Transformer service shall be underground to service disconnect. All underground primary voltage ducts shall be concrete encased. All underground primary voltage duct encasements will be red dyed concrete.

E. Transformer: Primary transformers shall be Delta primary-Wye secondary, 200 amp dead front feed through type with 10kV load break arrestors on the feed through side (if not being used).

Transformer shall include a single operated 4 position primary switch, 5 position no load tap changer, with normal tap plus 2 each 2 1/2 % taps above and below, pressure relief and drain valve, and with copper wound internal windings. Administrative facilities with computer loads shall have 220 degree F UL listed transformers with a K factor of not less than 4.0 per ANSI/EEE C57.1986 and secondary neutral 200% of phase. No rebuilt or re-manufactured transformers are allowed. All new transformers should be pad mounted. All transformers shall be internally fused. If the transformers are fed from an overhead line fused cutouts on the pole shall be provided so that fuses can be standardized. Feeders to transformers shall be a minimum #2 AWG jacketed concentric cable with full neutral (copper, no aluminum).

F. Meters are required for/on all facilities. Advanced meters are required on facilities greater than 35,000 SF. Perform a LCCA on facilities less than 35,000SF to determine if an advanced meter is to be used. Advanced meters are to be connected via the base wireless monitoring system. This applies to existing facilities only. All new facilities and renovation projects over $200K will have advanced meters installed. New power metering shall be installed on the secondary of each transformer and shall be of the microprocessor based intelligent type, with communications capability. The meter shall come complete with an Ethernet gateway and fiber optic modem, all enclosed in a NEMA 4X box with hinged door. The NEMA 4X box shall be mounted to the secondary enclosure of the transformer, on a separate concrete post next to the transformer or located in the electrical room containing the service entrance equipment. Provide split core type current transformers for the service, sized for the service amps or larger. Locate all new equipment so that it can be easily accessed for future connection to a base wide wireless “star” network. If the radio network is accessible provide connection to it. Basis of Design for advanced meter:

Square D Power Logic PM820 with Ethernet accessory or an equivalent poly-phase electricity meters suitable for billing, allocation of cost, and recording of data for energy management and control applications that complies with the metering requirements of EPACT05 may be used.

G. A temporary electric meter will be installed at each construction site (for monitoring purposes only)

H. Grounding: Ground rods, where used, shall be 3/4” copper clad, minimum length of 10’. Ground resistance shall normally be less than 25 Ohms though certain Air Force facilities may require ground resistance to be less than the minimum specified in the NEC. Transformer grounds shall be a 4 rod grid 2 feet from the pad. All ground rod connections below ground shall be exothermic or high compression connectors. Grounding for lightning arrestors on distribution lines shall be 15 ohms or less. Equipment ground conductors shall be an insulated conductor except lighting fixtures may be grounded through conduit.

I. Lightning/Surge Protection: Provide UL 1449 listed lightning/surge protection for all phase and neutral conductors at service entrance and branch panels for the appropriate category as defined in ANSI C62.1, and C62.45 and tested as defined in ANSI/IEEE C62.41. Test Wells will be installed at ground level points to access ground grid. Periodic testing is required by DoD.

J. Conduit: EMT or PVC may be used where permitted by NEC. Galvanized rigid conduit or intermediate metallic conduit may be used for all locations. Underground primary conduit shall be no less than 4” or larger schedule 40 PVC concrete encased in red dyed concrete. For transitions from underground to above ground, the first 10’ must be Rigid Galvanized Metal.

Metallic conduit installed below grade shall be protected with two coats of asphaltic paint (tar) applied after assembly. All primary conduits shall be encased in red dyed concrete except as allowed by ETL 07-1Prefer all outside conduit/conductors be placed underground.

K. Conductors: Copper (no aluminum) with THHN/THWN installation. Minimum wire size shall be #12. All buildings with computer loads shall have oversize neutral or a full size neutral for each phase conductor. Aluminum conductors shall not be used. Exceptions shall be considered on a case by case basis. For Triplex type overhead secondary lines, aluminum may be used. Metallic sheathed cable (Type MC) with ground may be used for branch circuit taps in wood frame buildings or in stud walls. Prefer all outside conductors be placed underground.

L. Lighting: Fluorescent--use 32 watt T-8 lamps with electronic ballast designed to operate with energy efficient lamps. Lamp color temperature of 4100 K is preferred HID--use metal halide or high pressure sodium. Where an equal is commercially available, use fluorescent or CF lamp fixtures in lieu of HID lamps. Do not use low pressure sodium fixtures. For street lighting, use cobra head type fixtures with 250 watt high pressure sodium lamps. Parking lot lighting, use box type fixtures that conform to the MacDill ACP. Per ETL 07-2007 incandescent lights are prohibited on Air Force Bases, use compact fluorescent lights. For airfield lighting requirements use UFC 3-535-01.

M. Lamp posts are anodize aluminum. Refer to the Base ACP plan for color and design style.

N. Fire Detection/Suppression: Provide automatic detectors in all occupied, unoccupied spaces and attics. Report to central alarm center via FM radio transceiver operating on 165.1375 MHz and completely compatible with Monaco D-500 PLUS Radio Fire Alarm Reporting System.

Contractor to provide transceiver, antenna and cable. All design work shall comply with Unified Facilities Criteria UFC 3-600-01 Fire Protection Engineering for Facilities. Use MacDill’s edited 16720 Fire Protection/Suppression specifications.

O. Breaker Panels: Bolt on breakers shall be specified. Provide 25%, minimum of 4, spare 20 Amp single pole breakers and an equal number of spaces. Provide at least two 1” conduits to above ceiling at panel location. Use only copper buses. Provide 200% neutral bus where required.

P. Emergency Generator: Diesel only with fuel on site to operate a minimum of 72 hours. Use caution during design to ensure that generator fueling access is included. Base Fuels refueling vehicles have a limited hose length and adequate fueling access (within 50 feet of the tank) is critical. Auto transfer switches shall be 4-pole only (switched neutral), with maintenance bypass isolation. No exercise timer. Transfer switch to operate by linear solenoid. Base preferred manufacturers for generators: Cummins, Caterpiller or Kohler. Base preferred manufacturer’s for Transfer Switches: GE/Zenith, Cummins, ASCO or Russelectric.

Q. Fault current available at the MacDill Ave substation (East or West 13.2kV bus) is as follows:

Three Phase 8500 A Single Phase - Ground 8900 A

R. Hangars: Voltage varies in these buildings. Check/verify that 240/416 volt and/or 277/480 volt electrical are available.

S. Overhead Electric: All new poles shall be concrete (A type construction). All down guys should be covered at ground level with tamper proof guy guards. Pole grounds shall be externally mounted. Limit those items that are mounted on the poles that are grounded. Since lightning strikes are a problem in this area, experience has shown that when items such as cross-arms, brackets, etc. are not grounded, when lightning strikes the pole, these items do not have to be replaced. Use porcelain cutouts and 10 KV MOV type lightning arrestors and external ground wire. No internal grounds are to be used on distribution poles. High voltage insulators should be clamp type rated at 25KV. No new overhead power lines should be constructed. Underground electric distribution is the preferred method for new construction.