Attachment_2a_-_21_CES_Design_Guide.pdf

21st Civil Engineer Squadron

Design Guide

9-May-19

DRAFT

A. INTRODUCTION

B. CIVIL

C. LANDSCAPE ARCHITECTURE

D. STRUCTURAL ENGINEERING

E. ARCHITECTURAL

F. FIRE PROTECTION

G. MECHANICAL ENGINEERING

H. ELECTRICAL ENGINEERING

I. COMMUNICATIONS

J. SECURITY

K. COMPUTER AIDED DRAFTING (CAD) AND SURVEYING

L. CONSTRUCTION MANAGEMENT

A. Introduction

1. The process of project design and construction is based on a multitude of codes, regulations, and other governing documents. The 21st Civil Engineer Squadron Design Guide has been written to address the unique requirements of Peterson Air Force Base (PAFB). In addition, not all aspects of a project’s requirements are addressed in codes and regulations. As such, this Design Guide provides information that may be missing from those other regulatory documents.

2. This document shall be used on all project designs produced for Peterson Air Force Base (PAFB). Because requirements change frequently, this document will be updated periodically by 21CES. Please ensure that the most current edition of this document is obtained before beginning any design project. The edition of this document that is provided at the beginning of design shall continue on through design completion, regardless of future updates.

3. Where conflicts are found between this document and any other guidance, bring them to the attention of the 21CES project manager. Only the 21CES project manager may waive the requirements of this document.

B. Civil

1. STORM DRAINAGE:

1.1. All storm drain pipe shall be double-walled corrugated polyethylene (CPE) with corrugated exterior wall and smooth interior wall, unless structural requirements dictate otherwise. Pipes smaller than 15-inch diameter may be of high density polyethylene (HDPE) or polyvinyl chloride (PVC). Minimum pipe diameter shall be 12 inches unless approved by the Government.

1.2. Maximum side slopes for unlined earth channels shall be 1V:3H.

Side slopes with riprap shall have a maximum side slope of 1V:2H.

1.3. Erosion protection is required at and opposite the point of entry of side inflows into earth channels.

1.4. Certain areas of PAFB storm drainage eventually flows to retention basins. Since this storm water does not flow directly into waters of the United States, the requirement for water quality control will be evaluated on a case-by-case basis by the Government.

1.5. The use of new retention basins is strictly limited. It is preferred that detention basins be used with a detention time of no more than 24 hours. Consideration shall be given to limiting the possibility of creating an attractive haven for water fowl which could create a flight pattern across active airfield areas, thus introducing a bird strike hazard.

2. PAVEMENTS:

2.1. The term "pavement" used in this document shall refer to either hot asphaltic concrete or Portland cement concrete.

2.2. The use of permeable concrete brick paver systems shall be considered for all new low volume roads and parking lots. Striping shall be accomplished using contrasting colored paver bricks as opposed to painting. Existing asphalt parking lots which are being repaired are not required to provide permeable pavers.

2.3. Joint sealant shall meet ASTM D5893. Color shall match the adjacent concrete after 28 days.

2.4. Roadways shall have a minimum transverse slope of 2% and minimum longitudinal slope of 0.5%.

2.5. All projects shall comply with the Peterson AFB Installation Facilities Standards (IFS).

2.6. All demolished pavement materials shall be removed from PAFB unless otherwise agreed upon by the Government. To the maximum extent possible, the Contractor shall dispose of asphalt and concrete materials at a local recycling center.

2.7. The following specifications shall be used. These specifications take precedence over other contracts, such as SABER or USACE.

PAFB SECTION 32 01 17 SEALING OF CRACKS IN BITUMINOUS

ROADS

PAFB SECTION 32 11 23 AGGREGATE BASE COURSE

PAFB SECTION 32 12 16 ASPHALT PAVEMENTS

PAFB SECTION 32 13 12 REPAIR OF CONCRETE AIRFIELD

PAVEMENTS

PAFB SECTION 32 13 13 CONCRETE PAVEMENTS FOR ROADS

PAFB SECTION 32 17 24 PAVEMENT MARKINGS

2.8. Concrete Curbs:

2.8.1. Curbs shall have control joints every 10 feet and expansion joints every 100 feet. If curb adjoins pavement or sidewalk, joints shall align with the pavement or sidewalk joints to the maximum extent possible.

2.8.2. Expansion joints shall be formed with 1/2" pre-formed water resistant board material and sealed.

2.8.3. New concrete curb shall be cured at least 3 days before allowing any construction traffic on it. Final responsibility for protection of new curb against damage by construction traffic lies with the Contractor.

2.8.4. Curbs poured against the edge of sidewalks shall not have preformed filler board joints. A bond breaker shall be used to keep the curb and sidewalk from bonding.

3. PAVEMENT PAINTING AND STRIPING:

3.1. Epoxy paint which is on the CDOT Approved Products List may be used with approval by 21CES.

3.2. Pavement paint colors for roadways shall comply with MUTCD and CDOT requirements, as applicable.

3.3. Roadways, parking lots, and other non-traffic pavements shall not have retroreflective media, unless approved by 21CES.

3.4. Thermoplastic paint may be used with approval by 21CES.

3.5. Airfield painting and striping shall comply with UFC 3-260-05FA , AFI 32-1042, and ETL 04-2.

4. CONCRETE SIDEWALKS:

4.1. Control joint spacing shall be equal to the width of the sidewalk up to 10 feet. The spacing for sidewalks over 10 feet in width shall be per each individual project. Control joints shall be located to minimize the probability of shrinkage cracking.

4.2. Expansion joints shall be installed every 100 feet of run and at intersections to other objects. Joints shall be formed with 1/2" pre-formed filler board and sealed. Color of sealant shall match the color of the concrete at 28 days.

4.3. Isolation joints shall be used at objects which are within or intrude into the sidewalk. Joints shall be formed using 1/2" pre-formed board material and sealed. Valve box risers are not required to be isolated.

5. ACCESSIBILITY:

5.1. All projects shall comply with the Architectural Barriers Act (ABA) and the "Public Rights-Of-Way" code per the United States Access Board.

5.2. Sidewalk ramps which discharge into vehicle traffic shall have raised dot detectable warning indicators, color dark red. Warning indicators shall be premanufactured products designed to be cast into wet concrete.

Cementitious or masonry tiles are not allowed. Surface applied indicators may be considered by the Government. Color of indicator shall extend through the entire thickness of the product. Sidewalk ramps which do not discharge into vehicle traffic shall not have detectable warning indicators.

5.3. Sidewalk ramps shall have a broomed finish with brooming transverse to direction of travel. Transverse traction grooves shall not be used.

5.4. Parking Lots:

5.4.1. Parking lot striping shall be white per MUTCD color

specifications unless noted otherwise.

5.4.2. Handicap symbols on pavements shall not be used.

5.4.3. Crosshatching in parking lots shall be 4 inch wide lines at 45 degrees to the curb and spaced at 24 inches on center.

6. UTILITIES

6.1. Water and sanitary sewer lines shall be polyvinyl chloride unless structural reasons dictate otherwise. Natural gas lines shall be polyethylene. All new utility lines shall be of non-metallic materials to the maximum extent possible. If metallic lines are used, adequate forms of corrosion control shall be provided in the form of passive systems (i.e.

sacrificial anodes). All plastic lines shall have a minimum #12AWG copper tracer wire with a suitable jacket for direct burial installed with them. Utility marking/warning tape shall be installed in trench approximately 12 inches above utility line.

6.2. Concrete pads for mechanical, electrical, and other types of utility services shall be constructed so that the bottom of the pad is at least 4 inches below finished grade and top of pad is at least 4 inches above finished grade. Pads shall be supported by a minimum 6-inch layer of gravel base course (CDOT Class 6) compacted to 90% modified Proctor density.

6.3. Boring under roadways is the preferred method for utility installation. Cutting across roadways shall be avoided. Cutting across driveways, such as parking lot access points, is allowed unless operational requirements of the facility dictate constant access, in which case utilities shall be bored under the driveway.

7. TRAFFIC ENGINEERING

7.1. PAFB receives deliveries from various sized vehicles. As such, all designs shall consider the requirement to accommodate a WB-67.

7.2. The speed limit on PAFB is 30 mph unless posted otherwise.

7.3. Follow the requirements of UFC 3-201-01 for traffic engineering.

The Colorado Springs Traffic Criteria Manual may be used if an issue is not covered by DoD criteria.

8. SITE IMPROVEMENTS

8.1. All site work shall be designed in accordance with the United States Access Board (USAB) Public Rights-of-Way Guidelines.

8.2. All pedestrian sidewalks shall be concrete unless required otherwise by the Government.

8.3. Unless noted otherwise, step risers shall have a batter of 1 inch.

Concrete step nosing shall have a 1/2 inch radius. Treads shall have a 2% slope, either transverse or longitudinal, to facilitate drainage.

8.4. The typical handrail and guardrail used at PAFB is manufactured from 1-1/4” nominal diameter standard steel pipe, painted. Other styles and designs may be considered. Architectural compatibility with other facilities in the vicinity and the type of architecture of the facility will drive the design.

8.5. Retaining walls may be either cast-in-place concrete or segmented masonry. Zero batter is preferred for both types of construction.

8.6. Walking path steps:

8.6.1. Ratio of riser height to tread length as follows: Tread Length = 26 - (2 x Riser Height).

8.6.2. A minimum of 3 risers. Otherwise, use a ramp.

8.6.3. Landings or sidewalk sections between stair sections shall be a multiple of 5 feet long in the direction of travel.

8.6.4. The vertical rise between landings shall be no higher than 5 feet.

8.7. Graded landscaped areas shall be no more than 1V:3H, unless soil retention methods are used to prevent erosion.

C. Landscape Architecture

1. GENERAL PROVISIONS:

1.1. The base has traditionally had one overall philosophy regarding landscape design. This philosophy has been based heavily upon creating a well-landscaped image commensurate with a major Air Force Headquarters base, while adhering to sustainable landscape principles.

There are several widely recognized and often used landscape details which have become an integral part of landscape design at Peterson AFB.

These should be used routinely at all landscape projects. These details are listed here, and several are discussed in more detail elsewhere in this section.

1.2. All landscape areas to receive plant material (trees, shrubs, vines, ground cover, perennials, annuals, ornamental grasses, seed or sod) shall have a horticultural soil analysis performed prior to final design (if new or renovation/rehab project) or application of fertilizer or amendments (if doing maintenance).

A standard soil test typically includes the following:

• Texture (estimated by the hand-feel method)

• Organic matter (reported as a percent of the total soil) o About two-thirds of a pound of nitrogen per 1,000 square feet will be released (mineralized to nitrate) during the growing season for each one percent organic matter present.

• pH

• Lime (CaCO3 reported by percent) o On soils with “free lime”, sulfur will not effectively lower the pH

• Soluble salts (reported in mmhos/cm or dS/m)

• Nutrients (reported in parts per million) o Nitrate nitrogen o Phosphorus o Potassium o Micronutrients such as copper, iron, manganese and zinc

1.3. PRE-EMERGENT HERBICIDE: All landscape areas, with the exception of native seed areas as applicable, shall be sprayed with an approved pre-emergent herbicide to prevent weed growth prior to soil preparation of shrub beds and turf areas. Refer to Manufacturer recommendations.

Do not spray herbicide if wind causes drift.

1.4. AMENDMENTS: Many areas of PAFB have a sandy loam soil

composition. An approved compost shall be amended over any disturbed areas as per recommendations from a horticultural soil test. This mixture shall be tilled in before seeding.

1.5. FINAL GRADE: The final grade for all landscape areas that receive mulching shall be smooth and sloped to drain prior to installation of the mulch materials. Do not use the mulch material to create a level, finished surface over improperly smoothed and un-graded soil surfaces.

1.6. LANDSCAPE REQUIREMENTS AT BUILDING FOUNDATIONS: Turf

grass and native grass shall not be permitted to abut building foundations due to irrigation and maintenance concerns. All facility foundations shall have a minimum 4'-0" wide buffer zone to any turf or native grass areas with a steel edge separator. This buffer area shall contain shredded wood mulch or approved rock mulch materials. ATFP approved plant material with drip irrigation and wood mulch is allowed and encouraged in foundation areas within 50 feet of the front entry.

Two to four inch diameter river cobble rock can be utilized along low visibility façade foundations as appropriate. Mechanical yard enclosures and screen wall applications shall be treated similar to building foundations with an appropriate buffer zone to adjacent turf areas.

1.7. AT/FP LANDSCAPES: Landscaping (including trees, shrubs, vines, ground cover, perennials, annuals, ornamental grasses, seed or sod) shall be required at the perimeter AT/FP zone to soften and buffer barrier elements. Approximately one tree for every 40 linear feet and one shrub every 6 linear feet. Plants may be grouped for better visual impact and shall be a variety of deciduous and evergreen materials. A minimum of one-half of the trees and shrubs shall be evergreen.

1.8. MINUMUM PLANT SIZES: Plant sizes and condition shall be based upon ANSI Z60.1 – American Standard for Nursery Stock. The recognized standard for Peterson AFB is to plant deciduous trees with a 2 1/2 inch caliper trunk and evergreen trees a minimum of ten feet tall. Plant shrubs in a minimum #5 size container overwintered at least one growing season in Colorado. Perennials shall be in a minimum #1 size container.

1.9. Provide physical separation between different landscape surfaces e.g., lawn area and planting bed. The separation material must be galvanized steel edging at all applications. Concrete edging is also permissible with approval of the Base Landscape Architect. This will help physically separate the planter mulches such as rock or wood from nearby materials such as turf grass or a different mulch type. Utilize perforated edging where drainage is problematic.

1.10. Provide permanent irrigation systems at all landscaped areas, including trees, shrubs, ground covers, annuals, perennials, vines, and turfgrass. One exception are areas of native grasses, which require watering for initial establishment only.

1.11. At all landscape areas to receive mulch, do not use underlayment fabrics. These have caused numerous maintenance problems and are undesirable for use.

1.12. Approved organic mulch shall be shredded cedar (gorilla hair or approved equal). Approved inorganic or inert mulch material shall be 1.5” canyon red rock which may be utilized directly adjacent to building foundations and existing areas of red rock, and as approved by the Government in other areas. A cobble consisting of 2” to 4” diameter blue/gray river cobble is permissible where approved by the Base Landscape Architect. This material is seen as typically used in swales.

Use of inorganic or inert mulch should be limited. All materials shall be installed at a settled depth of four inches (4”).

1.13. Protection of landscaping shall comply with PAFB Section 01 56 39.

2. TREES

2.1. Deciduous trees shall be of specimen quality, have a single straight stem and a fully branched crown unless specified otherwise (e.g., for character).

2.2. Evergreen trees shall be of specimen quality, have a single straight stem (unless approved otherwise by the Government) and be exceptionally heavy branched and well-shaped to within 6 inches from the ground unless specified otherwise (e.g., for character).

2.3. Tree Wrap: All thin or smooth barked deciduous trees shall be wrapped with an approved light in color, bio-degradable tree wrap to prevent sun scald. Wrap from the bottom up so that layers shed water.

At the top, secure the wrap with bio-degradable tape or office staples.

Never use nylon cord, wire, or fiber-reinforced tape.

2.4. Tree mulch: All trees shall be mulched with an organic mulch (specified above). The mulch area (ring) shall be a minimum six foot (6’) in diameter all trees or one foot (1’) beyond the drip line for larger evergreen trees.

3. FERTILIZER

3.1. Do not fertilize trees, shrubs, or ornamental grasses at time of planting. Annuals and perennials may be fertilized at time of planting.

3.2. Fertilize sod and seed areas according to recommendations from a horticultural soil test.

3.3. Application rate according to recommendations from a horticultural soil test.

3.4. Product Description: Product must be completely dry, free flowing, dust free and non-segregating. Material must not cake or stick in a conventional rotary or drop type fertilizer spreader.

3.5. The fertilizer bag label shall list and certify the “complete specifications”. No exceptions or deviations to specifications.

3.6. Spreader setting is to be approved 5 working days in advance by the QAE. Follow the equipment manufacturer’s application instructions. Do not fertilize if wind speed exceeds 10 miles per hour.

4. IRRIGATION SYSTEMS:

4.1. Back Flow Preventers: The Contractor shall install backflow preventers in heated mechanical rooms. A commercial grade main control valve shall be installed immediately prior to the backflow preventer. Piping shall be installed to avoid exposure to the elements.

Use a sweep type sleeve with soft copper or like material in sleeve to exit building 20 inches below ground and to extend thru below or beyond all hard surfaces. When outdoor installation is required, install in an insulated removable enclosure. Outdoor installation will require that both sides of the installation be drainable. All installations shall meet or exceed current State of Colorado backflow preventer requirements.

Install a 4” thick concrete pad underneath outside backflow preventers.

4.2. Piping Systems: PVC piping shall be used for all installations. Class 200 PVC solvent welded pipes are required. Any pipe larger than 2 inches shall be welded with a heavy bodied glue.

4.3. Electric Valves: Irri-Trol 700 series ultra-flow electric valves or RainBird electric valves are currently in use and meet all requirements.

Master valves shall be installed on each irrigation system. Utilize flow sensors that are compatible with central irrigation control system and base controllers.

4.4. Irrigation Controllers: Commercial rated controllers in all-weather metal lockable cabinets and master valve capabilities are required for all installations. Pedestal or wall mount are both acceptable. External installations are required. All controllers shall be equipped with remote control technology and a permanent pigtail for remote operation. New controllers shall be sized with 25% spare zone capacity. All wall type controllers shall be mounted at 5 feet from ground level. Electric metal conduit shall be installed from the controller to 20” into the ground with a sweep. Each controller shall have its own dedicated electric breaker switch circuit. Toro Sentinel controllers are currently in use or RainBird compatible controllers with Retro Link Cards. Controller shall be compatible with the base central irrigation system management (Toro- Sentinel Central Software) and be capable of flow sensor monitoring.

Utilize and install Sentinel Retro Link Cards for existing Rain Bird Controllers on base as applicable for any modifications or renovation projects of existing irrigation systems.

4.5. Sprinkler Heads: The RainBird 1800 series pop up spray with plastic nozzles on 1/2” risers are currently in use for small turf grass areas, shrubs, trees, and plant beds. For larger turf areas, I-20 Hunter rotor heads are currently in use. All heads shall be installed flush with the ground and perpendicular to level. Completely flush, clean, and adjust all heads to adequately cover all areas to be irrigated.

4.6. Sprinkler Head Riser Assemblies: On all systems with less than 40 psi operating pressure, a straight cut off type riser is required. Funny pipe will not be used. A triple swing joint is required for larger heads with pressure greater than 40 psi.

4.7. Drip Irrigation: Utilize minimum 3/4 inch drip tubing from irrigation main line for drip zones valves. Supply tubing shall be a minimum 12” below grade. Micro-tubing with drip emitters shall be designed to bring water from drip laterals to all trees, shrubs, and perennials below groundcover. Utilize non-clogging emitters on 6” stakes. Provide a minimum of two emitters to shrub material. Provide trees with drip rings.

Quantity of emitters may vary based on water requirements for plant materials. Provide drip zone blowouts within a rock sump valve box which shall contain male adapters and PVC end plugs as applicable. Micro sprays may be allowed for certain applications as approved by the Government. In-line check valves and filters shall be utilized as applicable for this system. Install an exterior flag-type monitoring component on each drip zone that will indicate when drip zone is operational. Flags are not required if flow sensors are installed to monitor operational flows.

4.8. Control Wiring: All wire shall be 14-gauge solid copper direct buried.

Common wire shall be white in color. Individual control wires shall be the same color. A minimum of three spare third color wires shall be installed in all main line trenches regardless of direction (e.g., if the main line is installed in two directions, a total of six wires will be required from the controller). Wiring shall be installed below and to the side of main lines. Where control wires do not run with a main line, they shall be denoted on the red-line as-built drawings.

4.9. Wire Connectors: For in-ground wire connections, Spears DS 400 prefilled watertight connectors or their equivalent are currently in use.

Wire nuts shall not be used.

4.10. Valve Boxes: Valve boxes shall be a minimum of 10 inches in diameter. A minimum of 6 inches is acceptable for drip valves only. All valve boxes shall be installed flush with the finished grade. Stack or extend valve boxes as needed. Ametek valve boxes are currently in use.

Valve box lids shall be factory colored to match the surrounding ground plan treatment adjacent to box. Painting of lids is not acceptable.

4.11. Drain Valves: Drains shall be installed on low points of main lines to drain sections as needed for maintenance. All drains shall be brass straight valve assemblies. Automatic drains of any type will not be used.

4.12. Quick Couplers: Quick couplers shall be installed as a blow-out assemblies. Single lug 1-inch quick couplers shall be used.

4.13. Trenching: The Contractor shall not use a pipe puller or vibratory plow to install pipe or control wires. All trenches shall be straight and smooth and of adequate depth for the type of pipe being installed. Main line depth shall be 18 to 20 inches below grade. Lateral pipe depth shall be 8 to 10 inches below grade.

4.14. Backfill and Compaction: All backfill material shall be clean soil, free of clods and rocks or any debris that could puncture pipelines.

Trenches shall only be compacted in 6-inch lifts and with a vibratory plate or trench foot jumping jack. Puddling, flooding, or any other means of compaction is not acceptable.

4.15. Sleeves: Class 200 PVC sleeves shall be installed under, and 1 foot beyond, all hard surfaces (e.g., sidewalks, driveways, parking lots, etc.).

All sleeves shall be straight without bends. Sleeves shall be 6” inside diameter, and installed 10 to 20 inches below grade for main lines and 8 to 10 inches below grade for lateral lines. Physical marking of sleeve locations is required and shall be designated by either stamping a small letter “s” (no larger than 2" square) onto the adjacent hardscape (i.e., walks or curb/gutter) while finishing or saw cutting a notch in the aforementioned hardscape locations after hardening. Sleeve markings shall be on both ends of sleeve location.

5. BLUEGRASS SOD AND/OR SEEDING SPECIFICATIONS:

5.1. Kentucky bluegrass sod shall be locally grown by a turf farm (sod nursery). The sod shall have a vigorous and healthy root system that has been regularly watered, mowed, fertilized and sprayed for weeds in the sod nursery.

5.2. The Kentucky bluegrass sod shall be an equivalent of a ninety-nine percent (99%) improved varietal blend composed of a mix of four or five of the following turf varieties; Midnight, Shamrock, Broadway, Touchdown, Allure, Glade, or approved equal selected for appearance (color, texture, shoot density, and growth habit), adaptation (drought tolerance, response to foot traffic, shade tolerance), cultural requirements (low maintenance, low water consumption, slow growth in height), and disease resistance.

5.3. Kentucky bluegrass seed shall be certified Blue Tag seed, certified by the State of Colorado Department of Agriculture to be apparently free from weeds, insect pests and plant diseases. The QAE personnel shall physically remove the blue tags from unopened bags.

5.4. The Kentucky bluegrass seed mix shall be an equivalent of a ninety-nine percent (99%) improved varietal blend composed of a mix of four or five of the following turf varieties; Midnight, Shamrock, Broadway, Touchdown, Allure, Glade, or approved equal selected for appearance (color, texture, shoot density, and growth habit), adaptation (drought tolerance, response to foot traffic, shade tolerance), cultural requirements (low maintenance, low water consumption, slow growth in height), and disease resistance. The mix shall have a purity/germination rating of no less than 90/80 with 98/85 preferred. Pure Live Seed (PLS) shall be no less than 83.3%.

5.5. Amendments: Amend bluegrass Turf Areas as per a required soils test recommendations. Till in amendments to a minimum depth of six inches (6”).

5.6. Establishment: Kentucky bluegrass seeded areas shall have no bare areas larger than six inched by six inches (6”x6”) after germination.

6. OTHER GRASS SEED SPECIFICATIONS:

6.1. Seed Mixture # 1 (Irrigated) shall be used in Zone # 1 high pedestrian and visible areas as a transition from Kentucky bluegrass areas to areas less visible and peripheral. Composition shall be a Tall Fescue Mixture to include three improved varieties of tall fescue and 6 percent Kentucky bluegrass as a binder for the grasses. Seeded at a rate of 350 lbs. per acre.

6.2. Seed Mixture # 2 (Semi-Irrigated) shall be used in Zone # 2, less visible areas, medians, adjacent to rights of way, sides of buildings, and adjacent to parking lots. Seeded at a rate of 200 pounds per acre.

Pubescent wheatgrass ‘Luna’ 35% by weight

Western wheatgrass ‘Arriba’ 18% by weight

Streambank wheatgrass 15% by weight

Slender wheatgrass 15% by weight

Thickspike wheatgrass 14% by weight

Sheep fescue ‘Covar’ 3% by weight

6.3. Seed Mixture #3 Fine Fescue Mixture (Semi-Irrigated)

SR 51 Chewings Red Fescue 35% by weight

Shade master Creeping Red Fescue 25% by weight

SR 5200 Creeping Red Fescue 20 % by weight

SR 3200 Blue Fescue 15% by weight

Freedom Kentucky bluegrass 5% by weight

6.4. Seed Mixture #4 (Non-Irrigated) shall be used in all non-irrigated native areas. Watering shall be required for establishment only.

Slender wheatgrass 16% by weight

Western wheatgrass 14% by weight

Thickspike wheatgrass 13% by weight

Streambank wheatgrass 12% by weight

Pubescent wheatgrass 10% by weight

Sideoats grama ‘Vaughn’ 10% by weight

Sand bluestem 10% by weight

Prairie sandreed 6% by weight

Sheep fescue ‘Covar’ 3% by weight

Bluegrama ‘Lovington’ 3% by weight

Littleblue ‘Pastura’ 3% by weight

Seeded at a rate of 45 pounds per acre.

6.5. Other grass seed establishment: Obtain a minimum of 75%

germination establishment coverage within 90 days or as applicable per season dates and season. Temporary watering is required to achieve this establishment.

6.6. For Additional Information on Native Grass Mixtures and

Maintenance, please refer to the Peterson Air Force Base Xeriscape Study & Design Guidelines.

D. Structural Engineering

1. GOVERNING BUILDING CODES: Pikes Peak Regional Building Department has no jurisdiction on Peterson AFB. As such, their local code requirements shall not be used. All code requirements originate with UFC 1-200-01.

2. WIND LOADS: The pressure coefficient of 0.00256 as used in ASCE 7 may be replaced with the value of 0.00212. This accounts for an altitude at Peterson AFB of 6,175 ft MSL.

3. SOIL BEARING CAPACITY: All new construction shall be based on a soil bearing capacity as determined by an independent testing laboratory from soil boring information. If soil borings are not possible or not deemed necessary by the Government, then an assumed value of 2,000 psf shall be used. The use of this prescriptive value is subject to approval by the Government.

4. MASONRY DESIGN: Special inspection shall be assumed in determining the compressive strength of masonry.

5. SERVICEABILITY REQUIREMENTS: Lateral drift limitations for wind loading shall be limited to 1/600 for masonry building exteriors and 1/400 for all other buildings, with a maximum limit of 3/8 inch per story.

6. CONCRETE:

6.1. Compressive Strength: The minimum nominal compressive strength for concrete buildings and structures not exposed to weather shall be 3,000 psi. Concrete exposed to weather shall comply with ACI 318 based on an Exposure Class F1 for concrete above ground and Class F2 for concrete in contact with soil.

6.2. Interior Concrete Floor Slabs: All concrete slabs for interior use not exposed to weather shall not have entrained air in the mix design.

6.3. Reinforcing Bars: Reinforcement for all concrete shall be 60,000 psi.

A higher value may be used if approved by the Government.

6.4. Vapor Retarder: Interior slabs on grade shall have a 10 mil vapor retarder installed beneath the slab. Location of vapor retarder shall be in accordance with ACI recommendations.

6.5. Capillary barrier: Interior slabs on grade shall have a 6 inch thick capillary barrier installed beneath the slab. Location of capillary barrier shall be in accordance with ACI recommendations.

6.6. Building Slab On Grade (SOG) Reinforcing: Slabs on grade for buildings which are reinforced shall use welded wire reinforcement size D14 or larger. Fiber reinforcement may be used for crack control only and shall be polypropylene with a denier less than 100 and a nominal fiber length of 2 inches.

6.7. Exterior Door Stoops: The subgrade for door stoops shall be scarified to 6 inches and recompacted to 95 percent Modified Proctor density. A 12 inch layer of CDOT Class 6 base course shall be laid on top of the subgrade and compacted to 100 percent Modified Proctor density.

The concrete door stoop shall be doweled into the building foundation to prevent uplift due to frost heave.

7. USE OF OTHER DESIGN GUIDES: No other design guide shall be used at Peterson AFB for structural design.

8. SEALED DOCUMENTS: Documents produced by a Contractor which require structural design shall be stamped and signed by a professional engineer or registered architect as the Engineer Of Record (EOR) in accordance with the requirements of the state within which they are registered.

E. Architectural

1. DESIGN EXCELLENCE: Excellence in architectural design for both the interior and exterior of all facilities at Peterson Air Force Base is a primary goal for all design projects. Reaching this goal requires a commitment to architectural quality and a design that is sensitive to both the surrounding community and to the specific functional needs of the customer. Careful attention shall be given to the customers’ functional requirements, an aesthetic solution compatible with the local environment and this design guide, interior and exterior details, siting, energy efficiency, and economy of design including life cycle cost. New facilities shall be creative yet harmonious with those existing facilities that are considered to be architecturally appropriate. It should be recognized that quality design does not imply added expense, and can often provide savings in operating, maintenance, and construction costs. Materials for both interior and exterior of facilities shall be selected and used with proper consideration for aesthetics, constructability, durability, sustainability, and maintainability.

Design decisions and material selections must have the supporting data necessary to justify the design adopted.

2. INSTALLATION FACILITIES STANDARDS: All designs for new buildings, additions, and/or alteration shall comply with the Peterson AFB Installation Facilities Standards (IFS).

3. SITE DEVELOPMENT: The Contractor shall utilize the Peterson AFB IFS in generating all options during the concept design phase of a project. The context of any given area of the base is addressed in the IFS and shall be strongly adhered to. The Contractor shall maintain all site and facility dimensions specified in the Peterson AFB IFS. This includes such things as airfield limits, clear zones, glide slopes, and height limits. The development of the site for any project shall take into account impacts to adjacent facilities and ground sites.

4. SITE DESIGN FEATURES: All walks, stairs, ramps, and railings shall comply with those requirements laid out in the PAFB IFS and this Design Guide. The appropriate parking lot setbacks and distances from existing facilities will be closely scrutinized both from those requirements set out by the IFS but also looked at from an Antiterrorism/Force Protection (AT/FP) perspective.

5. BUILDING DESIGN: New design projects shall be a direct result of the most efficient layout of space in relationship to the proposed site. Space requirements for new projects shall be developed from UFC 4-610-01 and in conjunction with any other AF or DoD design guides, instructions, handbooks applicable to the specific function and/or type of facility (e.g. VQ’s, Clubs, Chapels, CDC’s, etc.) The relationships of those spaces shall be developed from information obtained from the user. Required space for mechanical, electrical, and communication rooms shall be included in this space.

Renovation and repair projects need to be examined with the same requirements as a new building, but the design will be constrained to the existing space. Coordination of all parties involved in the design process is essential to ensure user needs are met without compromising design principals of this document. All applicable codes and smart design practices shall be incorporated into the design regardless of budget constraints.

6. BUILDING EXTERIOR:

6.1. Signs: Signs for accessible parking shall meet all Architectural Barriers Act (ABA) requirements and shall comply with the Manual on Uniform Traffic Control Devices (MUTCD). All other exterior signs, such as facility and directional signs, shall meet requirements and dimensions shown in the IFS and shall comply with UFC 3-120-01 Design Sign Standards.

6.2. Exterior Doors:

6.2.1. All exterior doors shall be 3 feet wide by 7 feet high by 1-3/4 inch thick in size, unless noted otherwise or required to accommodate maintenance or replacement of equipment.

6.2.2. All exterior doors shall open onto a concrete landing or stoop.

6.2.3. Exterior double doors shall have a removable center mullion frame assembly. The removable mullion shall have a locking device which is keyed to the door lock.

6.2.4. Exterior steel doors shall be SDI A250.8, Level 3 extra heavy duty flush steel type with 16 gauge pressed steel frames. Doors shall be weather tight and insulated to meet a minimum R-value of 10.

Exterior door frames shall have a thermal break to prevent thermal transfer. Doors shall be complete door and frame assemblies with weather-stripping, door bottoms, and threshold. All exterior exit door locations shall have panic hardware.

6.2.5. All exterior steel doors which require air louvers shall have the "Y" sight-proof type louver blades and an interior mounted bird screen wire mesh protection. All exterior steel door and frame assemblies shall arrive to the job site with a factory applied A25 galvannealed finish and a primer finish. It shall be the Contractor's option to have the door and frame receive a factory or field applied finish. Each door shall receive at least three final coats of paint.

6.2.6. All exterior aluminum doors shall meet or exceed heavy duty (Grade II) requirements. Doors shall be full glazed with narrow stiles and rails. Air leakage of a single leaf weather-stripped door shall not exceed 0.5 cubic feet per minute of air per square foot of door. An anodized coating, Architectural Class II, 0.7 mil or thicker finish shall be provided on all aluminum doors, windows, and door frames.

6.2.7. Entrance Vestibules: Entry vestibules shall be provided at all main entrances and at frequently used secondary entrances. All vestibules shall meet ABA requirements.

6.2.8. The main entrance to facilities required to meet accessibility requirements shall have a power operated pedestrian entry door complying with ABA. Large renovations of existing facilities shall be retrofitted to comply with this requirement. Door operators shall be hard wired and shall not use self-charging systems, battery power, or RF controllers.

6.3. Windows and Window Glazing: Appearance, function, heat gain and loss, maintenance, operation safety, structural requirements, and suitability for the climate of Peterson AFB shall be considered when selecting windows. Thermally broken aluminum frames shall be used to maximize window thermal resistance values. Glazing sizes and properties shall be based on wind load requirements for Peterson AFB, security requirements, and AT/FP for the facility. All new exterior glazing must comply with UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings. Low “E” glass shall be used at all locations. Tinted glass is acceptable, however applied film is not allowed. For renovations and additions, the color of the glazing and frames shall match that of the existing facility.

6.4. Brick: Every effort shall be made to match existing brick when constructing additions or alterations. Any time brick is to be used as an exterior material, guidelines from the Rocky Mountain Masonry Institute shall be used for installation. Required expansion joints shall be clearly identified on elevation drawings so the Contractor and inspectors can clearly identify joint locations. Brick dimension modules shall be used when laying out new floor plans in order to minimize the number of brick cuts. A 1 inch minimum air space shall be used at all brick veneer conditions. A 2 inch air space is optimum. All air spaces shall be kept free of debris and mortar. Wall sheathing shall be kept dry. Exterior face brick shall be installed at structural stem wall ledgers at 4 to 6 inches above finish grade. At no time shall brick units be placed below grade. All brick surfaces shall be pressure washed and cleaned prior to project closeout. Weep holes and continuous flashing shall be installed according to guidelines set by the Rocky Mountain Masonry Institute.

Cells of brick shall not be exposed. Contractor shall use solid brick units at applicable locations. When infilling an existing brick opening, Contractor shall tooth-in full bricks into existing courses for a uniform finished appearance.

6.5. Exterior Wall Louvers: Architectural louvers must be of a storm-proof type. In areas subject to high winds, use two louvers or a louver with adjustable damper. Louvers greater than 4 feet in width shall require a mullion. Avoid installing louvers at locations where snow could drift against them. All louvers shall be provided with a factory applied powder coat or anodized finish.

6.6. Exterior Insulation/Thermal Envelope: Insulation materials shall be used to create the optimum degree of energy efficiency within the specified design criteria. Placement of insulation shall be clearly thought through and identified on the drawings in order to provide a continuous envelope. Such things as structural beams, columns, and window mullions shall be insulated to prevent excessive condensation and frost.

All uses of insulation shall include a careful analysis of the control of moisture vapor and shall be documented in the Design Analysis. Metal roofing is particularly likely to reach temperatures that can condense uncontrolled moisture vapor and lead to serious damage to the facility.

Vapor retarder membranes and barriers shall be located on the drawings and identified in the specifications. Thermal resistance and/or conductance values for all building elements shall comply with ASHRAE

90.1. Calculations shall be included in the Design Analysis and the R-value for all insulation to be used shall be identified on the drawings.

6.7. Foundation Perimeter Insulation: Perimeter insulation shall be provided on the interior surface of foundation stem walls for all heated facilities. Thickness shall be a minimum of 2” (nominal). Insulation shall be placed on the inside face of the foundation, extending down to top of footing or to design frost depth, whichever is less.

6.8. Roofs: Projects requiring new roof construction shall use standing-seam metal, asphalt built-up, modified bitumen, or EPDM roofing systems and shall follow all Air Force Standards. Any other roof type shall be required to receive approval by the Government. Check with the IFS to see if the building falls within a particular character area for roof preference. Projects that require an addition to the existing structure shall match the existing roofing system that is in place on the existing facility.

6.8.1. All new roofs shall have a minimum 20 year warranty covering all components of the roof including but not limited to: membrane, flashing, insulation, gravel stops, metal edge, panels, counter flashing, pitch pans, drains regardless of brand or installer. Lightning protection shall be fully integrated and coordinated with the roof detailing and installation so that it does not jeopardize the roof warranty. All standing seam metal roofs shall be provided in a sufficient gauge and with intermediate rib stiffener profiles to avoid oil-canning issues. Standing seam metal roofs may also require snow guards to prevent sliding snow, based on location of doors and pedestrian paths. All sloped roofs without interior roof drain system shall have gutters and downspouts. All downspouts shall receive a splash-block. All metal roofing, soffit, fascia, capping, flashing, gutters, and downspout material shall be delivered with a factory applied finish in all cases. Open downspouts are discouraged. If open downspouts are used, they shall be factory finished on the inside to match the outside.

6.8.2. Roofing Solar Reflectance: All new and replaced roofing systems shall be designed to reduce heat build-up for energy efficiency and reduction of heat island effects. All low slope roofing systems (<2/12 pitch) shall have an SRI (Solar Reflectance Index) rating of 78 or greater per ASTM E 1980. All steep slope roofing systems (>=2/12 pitch) shall have an SRI rating of 35 or greater per ASTM E 1980. The only exception to these requirements are for steep slope roofing systems at existing facilities, in which the new roofing system shall be allowed to match the existing roofing system.

6.8.3. Roof Insulation: The preferred method for insulating the roof of a facility is to place the insulation on the structural roof deck. The minimum aged "R" value of the roofing insulation shall be in accordance with ASHRAE 90.1.

6.8.4. Roof Access: A roof access hatch shall be provided to facilitate roof inspection and the maintenance of roof mounted equipment and all sections of the roof itself with a parapet height of 15 feet or greater. An exterior ladder shall be provided for all single story structures with a parapet height of less than 15 feet. Ladders or other means of access (stair well door access etc.) shall be provided to all roof sections. Exterior roof ladders which are accessable from the ground shall be secured per UFC 4-010-01.

7. BUILDING INTERIOR:

7.1. Doors:

7.1.1. All interior doors shall be 3 feet wide by 7 feet high by 1-3/4 inch thick in size, unless noted otherwise. Interior doors shall typically be stained & finished wood doors. The only except to this requirement is at industrial type applications in which steel doors shall be used.

7.1.2. All interior wood doors shall be a solid core type with a white birch veneer face on both sides. Hollow core wood doors may not be used. Doors shall be no less than 5 ply construction. Wood grade shall be a premium grade with a rotary cut finish. All new interior wood doors shall have a stained and sealed clear coat finish. Stained doors shall arrive at the job site with a factory finished. Door lites at wood doors shall have flush wood stops matching the finish of the door and shall be provided by the door manufacturer. Metal doors shall have an A25 galvannealed coating. Doors fabricated of stainless steel, aluminum, or other special materials shall be used at interior locations subject to excessive humidity or dampness. All interior steel doors and frames shall arrive to the job site with a factory applied primer finish. It shall be the Contractor's option to have the final door and frame paint finish as a factory or field applied finish.

7.1.3. Sound rated doors, frames and hardware shall be an assembly which is a manufacturer's standard product and shall have been tested in accordance with ASTM testing requirements. All hardware for sound rated doors shall be factory prepped as not to degrade the door’s rating. Contractor may chose to use either wood sound rated doors or wood veneered metal sound rated doors.

7.1.4. Wire Glass, if required at fire rated windows or door lites shall be rated in accordance with governing code requirements. Glass shall be Type II, Class 1, Quality q7, Form 1 with a polished stainless steel Mesh 1- diamond.

7.1.5. Door air louvers are not permitted on any interior door. Air ventilation requirements shall be achieved through wall and ceiling grilles.

7.1.6. All interior door frames shall be 2 inch width frames (head and jamb), 16 gauge minimum pressed steel. All frames shall have welded corners unless specifically noted otherwise.

7.2. Interior non load-bearing partitions: Partitions shall be minimally constructed of 350S125-33 steel studs at 16 inches on center with 5/8 inch Type X gypsum board unless otherwise required per design. Walls shall extend no less than 6 inches above suspended ceiling system and shall be braced to the structure above. All exposed gypsum board wall surfaces shall be finished and painted.

7.3. Gypsum wallboard finish: Gypsum walls shall receive a minimum Level-4 gypsum finish with a light orange-peel finish. Areas that require a higher level of hygiene, such as restrooms and kitchens, shall receive a minimum Level-5 (slick) gypsum finish. All gypsum finishes shall be in accordance with the Gypsum Association standards and recommendations.

7.4. Sound and vibration control: Noise control shall be considered in all facility designs. Both internal and external sound shall be controlled.

New and renovated facilities shall be oriented to minimize external noises and rooms shall be configured to maximize appropriate work environments as required. Interior walls requiring STC ratings shall extend to the underside of the structural deck above and shall be designed and constructed in accordance with UL and approved tested systems. All full height walls shall be sealed at the floor/ceiling connections. Blown-in or loose fill insulation will not be acceptable to insulate walls or ceilings for noise control. Provide ceiling tiles with a minimum 0.70 NRC at all offices, corridors, conference rooms, and large spaces. Standard materials and installation procedures shall be incorporated into all projects that reduce sound and vibration. When constructing walls, floors, ceilings, and roofs, materials shall be selected that will impede transmission of equipment vibrations and noise between rooms and within rooms. Where indicated, interior walls shall extend up to the underside of structure and form an air-tight seal. Interior gypsum board walls shall be constructed floor to deck, receive full stud depth sound batt insulation and shall be acoustically sealed at the floor and upper structure attachment at the following locations:

Perimeter walls of restrooms

Perimeter walls of conference rooms and classrooms

Perimeter walls of public corridors and stairs

Perimeter walls of the mechanical rooms & chases

Perimeter walls of the communications rooms, electrical rooms, and computer server rooms

Perimeter walls of high level private offices

7.5. Protecting partition finishes: Corner guards, either metal or plastic, shall be provided at outside corners. Corner guards for administrative areas shall be solid color plastic, coordinating with wall color, and shall have 2-inch returns unless specifically noted otherwise. Corner guards for high traffic and semi-industrial or industrial areas shall be stainless steel with a minimum of 3-inch returns. Corner guards shall extend from the top of the base to top of door frame.

7.6. Ceiling tile: Ceiling tile shall be a tegular 2’ x 2’ x 3/4” thick tile with a reveal edge and a fine texture. Tile grid shall be 15/16” wide.

Performance characteristics are Class A; NRC-0.70; CAC-40; LR-0.86;

and minimum recycled content of 82%.