East Bend Communications Tower

2026-11-03

Yadkin County is seeking proposals from qualified vendors for the design , fabrication , and delivery of a 380 foot , self - supporting lattice communications tower and foundation design to support public safety communications equipment for the North Carolina State Highway Patrol ( NCSHP ) and Yadkin County . Foundation construction and tower erection to be provided by others in a separate RFP . Specifications All tower design requirements , antenna loading , environmental loads , and foundation requirements are defined in the attached Tower Procurement Package – East Bend ( ETS Job No . 25132530 . STR . 5561 , dated January 23 , 2026 ). Key technical requirements ( citations from the attached document ): • Structure Type : 380 - ft self - supporting lattice tower • Design Standard : ANSI / TIA - 222 - G - 2 per 2018 NC Building Code ; ASCE 7 - 10 • Wind Load : 115 mph ultimate 3 - sec gust ; Exposure C ; Structure Class III ; Risk Category IV • Ice Load : 0 . 75 in radial ice with 30 mph wind ( TIA - 222 - G ) • Seismic : Ss = 0 . 189 , S1 = 0 . 085 , TL = 8 ( ASCE 7 - 10 ) • Materials : Solid round and angle steel only ; ASTM A325 bolts ; hot - dip galvanized per ASTM A123 / A153 • Design Capacity : Tower must not exceed 95 % capacity with all loading ; 85 % without future loading • Antenna Loading : As listed in Table 1 – Antenna / Coax Loading ( multiple NCSHP antennas , dishes , future loading , ice shields ) • Foundation : Must use provided geotechnical report ; special pier height requirements due to 2 . 5 - ft grade difference between legs • Lighting : FAA AC 70 / 7460 - 1K compliant obstruction lighting ( Drake Lighting ) • Grounding : Must comply with Motorola R56 and construction documents ; includes tower ground ring and connections Site Name : Eastbend Site Address : Baker Road , East Bend , Yadkin County , NC 27018 Latitude : N 36 ° 14 ' 42 . 65 " ( 36 . 245181 °) Longitude : W 80 ° 28 ' 36 . 39 " (- 80 . 476775 °) Structure Type : 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 - Design Antenna / Coax Loading , the tower superstructure and substructure shall NOT exceed 95 % of its capacity . Additionally , the tower superstructure and substructure shall NOT exceed 85 % of its capacity when excluding all loading marked “ Future ” in Table 1 . 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 and 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 : 0 ’ Standard : ☒ All towers and foundations shall be designed to meet the requirements of ANSI / TIA - 222 - G - 2 per the 2018 North Carolina Building Code ( 2015 IBC ), ASCE 7 - 10 . Exception : Concrete foundation pads ( if specified ) to also be designed considering the Transfer of Pier Forces per ANSI / TIA - 222 - H - 1 Section 9 . 4 . 2 ( Ref to ACI 318 - 14 Section 8 . 4 . 2 . 3 . 2 ). Design Wind Speed : ☒ 115 mph ultimate 3 - second gust Risk Category II wind speed ( converted to an equivalent 89 mph nominal 3 - second gust wind speed per 2015 IBC Section 1609 . 3 . 1 for use with TIA - 222 G ) as required by the 2018 North Carolina State Building Code ( 2015 IBC ) and ASCE 7 - 10 . Importance factor of 1 . 15 considered for Structure Class III in wind pressure equation per Rev . G Sect . 2 . 6 . 9 . 6 . Structure Class : ☐ ☐ ☒ Structure Class I – Low Hazard Structure Class II – Significant Hazard ( Default ) Structure Class III – Substantial Hazard Risk Category : ☐ ☐ ☐ ☒ Risk Category I – Low Hazard Risk Category II – Moderate Hazard ( Default ) Risk Category III – Substantial Hazard Risk Category IV – Essential Hazard ( Essential Communications ) Topographic Category : ☒ ☐ ☐ ☐ ☐ 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 Category : ☐ ☒ ☐ Exposure B – Urban and Suburban Areas Exposure C – Open Terrain where Exposure B or D does not apply . Exposure D – Flat , Unobstructed Shorelines

North Carolina

2026-05-08