HP-1085_Ellerbe_Tower Procurement Package_February 29, 2024.pdf

Tower Procurement Package Ellerbe - Viper

February 29, 2024 ETS Job No. 23116978.STR.7405

3227 Wellington Court Raleigh, NC 27615 (919) 782-2710

Site Name:

Site Address:

Latitude:

Longitude:

Structure Type(s):

176 Jimmy Carriker Road, Ellerbe, Richmond County, NC 28338

35.120372° -79.710803°

Proposed 380.0-ft Self-Support Lattice Tower

Contact Information: Contact the owner with questions regarding the content of this Document. All questions or concerns shall be directed to the contact stipulated in the Bid Document.

Design Capacity: The tower shall be designed so that, once installed with all loading as shown in Table 1 – Preliminary Design Antenna/Coax Loading, the tower superstructure and substructure shall NOT exceed 95% of its capacity. If, upon evaluation, the design computes to be at a greater stress level than specified the bid will not be accepted. All bidders must provide design calculations verifying that this Design Capacity Requirement is met; see “Deliverables” for details.

Materials: Tower structures shall utilize solid round or angle structural steel members. No other materials or shapes shall be given consideration.

Structural bolts must meet the ASTM A325 specification, or equivalent if approved by the design engineer of record.

Design Fall Radius: No Fall Radius Required Fall Radius Required from Centerline of Tower: 50-ft

Standard: As a minimum, all towers shall be designed to the requirements of ANSI/TIA-222-G, including released addendums

Design Wind Speed:

Structure Class:

Risk Category:

Topographic Cat.:

Exposure Category:

122 mph ultimate 3-second gust wind speed (converted to an equivalent 95 mph nominal 3-second gust wind speed per Section 1609.3.1 for use with TIA-222 G) as required by the 2018 North Carolina Building Code (2015 IBC) and ASCE 7-10.

Structure Class I – Low Hazard Structure Class II – Significant Hazard (Default) Structure Class III – Substantial Hazard

Risk Category I – Low Hazard Risk Category II – Moderate Hazard (Default) Risk Category III – Substantial Hazard Risk Category IV – Essential Hazard (Essential Communications)

Category I – No abrupt changes in general topography Category II – Structures located at or near the crest of an escarpment Category III – Structures located in the upper half of a hill Category IV – Structures located in the upper half of a ridge Category V – Wind speed up criteria based on a site-specific investigation (see attached)

Exposure B – Urban and Suburban Areas Exposure C – Open Terrain where Exposure B or D does not apply Exposure D – Flat, Unobstructed Shorelines

February 29, 2024

Design Ice Loading:

Seismic:

Tower Finish:

Tower Lights:

Grounding:

Climbing Facilities:

Ice Bridge:

Transmission Ladder:

Foundation:

Antenna Mounts:

Not required ANSI/TIA-222-H: x.xx inch escalating with a xx mph 3 second gust wind speed ANSI/TIA-222-G: 0.75 inch escalating with a 30 mph 3 second gust wind speed ANSI/TIA/EIA-222-F: x.xx inch escalating with an xx mph fastest mile wind speed

Seismic Ss: 0.248 / Seismic S1: 0.105 / Seismic TL: 8 Ss exceeds 1.0. Seismic loads shall be evaluated in accordance with the Standard

Galvanized Painted per FAA Advisory Circular AC 70/7460-1K Painted per Local Requirements All structural steel products shall be hot-dip galvanized in accordance with ASTM A123 specifications. Tower manufacturer shall produce documentation verifying the appropriate galvanizing process that is utilized. All steel hardware shall be galvanized in accordance with ASTM A153 or ASTM B695 specifications.

Not required Provide obstruction lights per FAA Advisory Circular AC 70/7460-1K. A lighting system by Drake Lighting, that complies with the FAA regulation, is required.

Tower lighting system with E2 Avian Compliant Obstruction Lighting System (white strobes by day, and red lights at night). Beacons and Obstruction lights shall be all LED and Dual Red/White medium intensity and shall meet the requirements of FAA Advisory Circular AC 70/7460-1K. Ice shields shall be installed above sidelights to prevent damage to lenses from falling objects.

Grounding, lightning protection, and surge protection systems shall be installed as required In compliance with R56 specifications and the construction documents. Coordinate with the Duke Energy bid administrator for the portion of tower grounding scope of work as shown in the construction documents. Minimum of the tower ground ring, connections from the ring to the tower, the bottom tower ground bar, and the connection from the tower ground ring to the bottom ground bar shall be included.

Not required Provide Climbing Facilities with safety climb.

A single face mounted ladder is required. A single safety fall protection system incorporating a 3/8” diameter stainless steel cable meeting OSHA/ANSI specifications shall be installed the full height of the structure. Additionally, full height step pegs on all three tower legs are required.

Not required; Another contractor to provide Provide an option for Ice Bridge

Not required; carrier to provide Provide Transmission Ladder. Include “per foot” pricing.

Provide Preliminary Design using Presumptive Soil Parameters per the TIA-222-G Standard (Annex F). A Geotechnical Report will be provided at a later date for the final foundation design.

Design with Geotechnical Report provided. In accordance with ANSI/TIA-222-G, Annex A, Section A.9.0, the tower manufacturer shall ensure the proper development of anchor rods and anchorage materials.

Not required; Antenna Mounts provided by carrier.

Provide mounts per Table 1 – Design Antenna/Coax Loading

February 29, 2024

Additional Design Requirements

Structural Guidelines:

All leg capacities for lattice towers shall be computed utilizing a global effective length factor (K) of 1.0. All leg capacities shall be calculated utilizing the working points between panel points. Utilizing the side (gusset) plate length to reduce the un-braced length of the leg is not permitted. Leg members are to consist only of steel solid rod and angle members. Tubular steel leg members are not permitted.

For round leg latticed towers, bracing member capacities shall be calculated considering the effective length to be the span between the weld lines of the gusset plates at the face of the round legs for both out-of-plane and in-plane buckling modes.

Hardened galvanized flat washers (ASTM F436) shall only be used in fully tensioned bolted connections and connections that utilize oversized or slotted holes.

Linear Appurtenances:

The tower analysis model shall include all feed lines, feed line ladders, step pegs, climbing ladder and safety climb.

Discrete Appurtenances:

Effective Projected Area (EPA)A for antennas shall be determined according to TIA-222-G, Section 2.6.9.2, Design Wind Force on Appurtenances. If antenna or mount areas are specified, the provided values shall be used in lieu of calculated values. If height, width, and depth dimensions are provided by the antenna manufacturer, the panel shall be treated as a flat rectangular panel. Force coefficients shall be determined based on antenna aspect ratios and multiplied by the projected areas to calculate front and side EPAs.

Wind tunnel test results shall NOT be used unless the results have been provided to ETS and proposed effective areas have been approved. Back-calculating wind areas from published antenna manufacturer’s wind loads are prohibited.

Deliverables: [Once awarded, Final Deliverables shall bear the seal of a North Carolina Professional Engineer]

A PDF softcopy of all deliverables shall be sent to ETS for recording purposes. All tower designs shall be complete with the following:

General Notes Profile drawing (with tower reactions, design parameters, materials grades and referenced codes and standards shall be clearly shown) Foundation design drawings Supporting design calculations for tower and foundation Listing of main structural members Mount documentation specifically showing total EPA

February 29, 2024

Table 1 – Design Antenna/Coax Loading

Owner Quantity Model# Elevation Leg Cable Size

NCSHP 1

CC807-11

(RX) (VIPER)

380 B 7/8"

NCSHP 1 TTA (VIPER) 380 B 1/2"

NCSHP 1

CC807-11

(TX) (VIPER)

380 C 1 5/8"

NCSHP 1

ANT150F6

(Telewave)(VIPER)

360 A 7/8"

NCSHP 1 CC807-11 (RX) 360 B 7/8"

NCSHP 1 CC807-11 (TX) 360 C 1 5/8"

NCSHP 1 CC807-11 (RX) 340 B 7/8"

NCSHP 1 CC807-11 (TX) 340 B 1 5/8"

NCSHP 1 8’ Commscope 210 B EW63 NCSHP 1 8’ Commscope 201 B EW63 NCSHP 1 6’ Commscope 176 C EW63 NCSHP 1 6’ Commscope 176 A EW63 NCSHP 1 6’ Commscope 124 B EW63 NCSHP 1 8’ Commscope 265 C EW63 NCSHP 1 6’ Commscope 265 B EW63 NCSHP 1 8’ Commscope 265 B EW63 Forestry 1 DB224 380 A 7/8" Telewave 1 ANT150F6 338 C 7/8"

Army 1

RFI BA40-57-P

3' standoff

329 B 7/8"

FBI 1

Commander 150-5N

311 B 7/8"

- 1 DB5001 standoff

Army 1

RFI BA40-57-P

3' standoff

299 B 7/8"

NOAA 1

20' x 4 element Dipole

289 A 7/8"

Telewave 1 ANT150F6 250 B 7/8"

- 1 DB-224 220 B 7/8"

- 1 3'x6-Element Yagi 113 A 7/8" Broadband 3 Ubiquiti AM-V5G-Ti 80 B CAT5e

- 1 Kathrein Paraflector

240 C 7/8”

Notes:

A-Leg orientation is set to an azimuth of ~335 degrees. The final orientation is set per the issued construction drawings

1) Minimum Total Mount EPA per latest vendor documentation

2) Ice Shields over all Microwaves are to be supplied, but installed by others

3) Reserved Loading to be included in initial tower design

4) The builder will supply side arms with side struts for all dipole and omni antennas listed above. However, tower manufacturer shall design tower so that all side arms with side struts are included in the loading.

5) The builder will supply microwave pipe mounts for all microwaves listed above. However, the tower manufacturer shall design tower so that all microwaves have pipe mounts that are included in the loading.

APPENDIX A

Verification of Design Loads

ASCE 7 Hazards Report Address:

No Address at This Location

Standard: ASCE/SEI 7-10 Latitude: 35.1204

Risk Category: IV Longitude: -79.7108

Soil Class: D - Stiff Soil Elevation: 557.625855996914 ft (NAVD 88)

Wind

Results:

Wind Speed 122 Vmph

10-year MRI 76 Vmph

25-year MRI 84 Vmph

50-year MRI 90 Vmph

100-year MRI 96 Vmph

Data Source: ASCE/SEI 7-10, Fig. 26.5-1B and Figs. CC-1–CC-4, and Section 26.5.2, incorporating errata of March 12, 2014Date Accessed: Mon Aug 14 2023

Value provided is 3-second gust wind speeds at 33 ft above ground for Exposure C Category, based on linear interpolation between contours. Wind speeds are interpolated in accordance with the 7-10 Standard. Wind speeds correspond to approximately a 3% probability of exceedance in 50 years (annual exceedance probability = 0.000588, MRI = 1,700 years).

Site is not in a hurricane-prone region as defined in ASCE/SEI 7-10 Section 26.2.

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SS : 0.248

S1 : 0.105

Fa : 1.6

Fv : 2.38

SMS : 0.397

SM1 : 0.25

SDS : 0.265

SD1 : 0.166

TL : 8

PGA : 0.124

PGA M : 0.192

FPGA : 1.552

Ie : 1.5

Seismic Design Category:

D - Stiff Soil

D Design Response Spectrum

S (g) vs T(s)a

MCE Response SpectrumR

S (g) vs T(s)a

Seismic

Site Soil Class:

Results:

Data Accessed: Mon Aug 14 2023

Date Source:

USGS Seismic Design Maps based on ASCE/SEI 7-10, incorporating Supplement 1 and errata of March 31, 2013, and ASCE/SEI 7-10 Table 1.5-2. Additional data for site-specific ground motion procedures in accordance with ASCE/SEI 7-10 Ch. 21 are available from USGS.

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Ice

Results:

Data Source:

Date Accessed:

Ice Thickness: 0.75 in.

Concurrent Temperature: 15 F

Gust Speed 30 mph

Standard ASCE/SEI 7-10, Figs. 10-2 through 10-8

Mon Aug 14 2023

Ice thicknesses on structures in exposed locations at elevations higher than the surrounding terrain and in valleys and gorges may exceed the mapped values.

Values provided are equivalent radial ice thicknesses due to freezing rain with concurrent 3-second gust speeds, for a 50-year mean recurrence interval, and temperatures concurrent with ice thicknesses due to freezing rain.

Thicknesses for ice accretions caused by other sources shall be obtained from local meteorological studies. Ice thicknesses in exposed locations at elevations higher than the surrounding terrain and in valleys and gorges may exceed the mapped values.

The ASCE 7 Hazard Tool is provided for your convenience, for informational purposes only, and is provided “as is” and without warranties of any kind. The location data included herein has been obtained from information developed, produced, and maintained by third party providers;

or has been extrapolated from maps incorporated in the ASCE 7 standard. While ASCE has made every effort to use data obtained from reliable sources or methodologies, ASCE does not make any representations or warranties as to the accuracy, completeness, reliability, currency, or quality of any data provided herein. Any third-party links provided by this Tool should not be construed as an endorsement, affiliation, relationship, or sponsorship of such third-party content by or from ASCE.

ASCE does not intend, nor should anyone interpret, the results provided by this Tool to replace the sound judgment of a competent professional, having knowledge and experience in the appropriate field(s) of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the contents of this Tool or the ASCE 7 standard.

In using this Tool, you expressly assume all risks associated with your use. Under no circumstances shall ASCE or its officers, directors, employees, members, affiliates, or agents be liable to you or any other person for any direct, indirect, special, incidental, or consequential damages arising from or related to your use of, or reliance on, the Tool or any information obtained therein. To the fullest extent permitted by law, you agree to release and hold harmless ASCE from any and all liability of any nature arising out of or resulting from any use of data provided by the ASCE 7 Hazard Tool.

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ETS Job# 2111657.STR.6508

APPENDIX B

Site Vicinity and Location Map

Ellerbe - 380-ft SST Exposure Category C Topographic Category 1

Legend

Tower Point

1 mi

N

N