Appreciating Your Vertical Real Estate - Hatfield & Dawson

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ABA 2012 Hatfield & Dawson Consulting Engineers

Appreciating Your Vertical Real Estate

Stephen S. Lockwood, P.E.Hatfield & Dawson Consulting Engineers

9500 Greenwood, Ave, Seattle, [email protected]


Overview

• Market Trends• Economics• Wireless Leases• TV & FM Facilities• AM Facilities• Questions


Market Trends• New Build out of LTE (Long Term

Evolution – 4G – Next Big Thing)

• More cell sites– Closer together

– Higher data capacity

– Tower mounted amplifiers fed by fiber optic & power that crosses base insulator

• Understand your local area– Unique site

– Restrictive Land Use area

– Ask other landlords – FOIA public agencies


Economics

• Does your site have an economic advantage for the wireless provider?

– Existing land use permits

– Coverage of important areas

– Power

• Leasing tower space provides revenue for facility upkeep and bottom line


Economics

• New income stream

• Maintenance relief for broadcaster

– Require site maintenance

• Opportunity to upgrade facilities in exchange for rent credit

• Use monthly income for facilities maintenance


Benefits to Wireless Providers

• Thousands of unused sites in urban and poor coverage areas

• Existing structure, minimal or no community resistance

• Zoning/permitting facilitated

• Less site work and tower provisioning than a “greenfield site”

• Faster time to market for new wireless facilities

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Challenges to Wireless Providers

• They do not understand broadcast facilities

– Antenna

– Ground systems

• Find broadcasters unwilling play along

• Find broadcasters hard to get along with


Wireless Lease

• Lease vs. License

• Make agreement reciprocal– Treat each as equals

– Termination clauses (30 days vs. 30 years)

– Restrictions and Rights

• Get an escalation clause (3-4% or CPI)

• Typical rents $1,000 to $4,000 – location and market dependent

• Site access


Wireless Lease

• Site construction drawings

• Complete design– Telco

– RF

– Grounding

– power

• Approval of all changes throughout the life of the lease

• Document everything – Wireless carriers use contractors for everything and have a short memory

• Get a copy of all communications with the city


All Wireless Installation

• Analysis of tower by Registered Professional Structural Engineer (P.E.) who know about towers

• Competent A&E for design work with your consulting engineer

• Building space, building systems, electrical, heat load and access

• Local permits


TV/FM Sites

• Site restrictions

• RF Safety – Exposure

• Assure they understand broadcast facilities


AM Towers

• Isolation across the tower base

• Isocoupler

• Iso-coil

• Slotted coils

• Power

• Fiber Optic

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AM Directional Antennas

• Need a moment method analysis to determine which tower in the DA to use

• Determine if the existing DA parts can be adjusted for the expected changes

• Pattern bandwidth analysis

• Have wireless provider pay for a new moment method proof on DAs


AM Tower Requirements

• AM feed system analysis

– Base impedance

– System bandwidth

– On high power system consider high voltages

– Full system design


AM Tower Requirements

• RF Safety

– Shock and burn

– Exposure

• Signs from www.radhaz.com


Ground Systems

• Assure that the wireless provider and their team understand your ground system (detail them on the drawings)

• Assure that their ground system has been bonded to yours in an appropriate manner –think about faults & lightning

• Document everything – Someone will try and change something in the future

• Typical wireless ground 6 to 12 – 8 foot ground rods & 2 AGW wire – AM ground system 20,000 feet of 10 AGW wire


Typical Wireless Ground System


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FCC Requirements

• Measure base impedance on ND

• Possible partial proof on DA

• File new FCC 302 form

• This needs to be done every time something changes above the base insulator


From WLW 700 kHz

STUDIO TO TRANSMITTER LINK 950MHZ ISOCOUPLER

MODEL FMC-7.5 & FMC-30FM ISOCOUPLERS

MODEL FMC-1.9G-PCS ISOCOUPLERS FOR 3G CELLPHONE INSTALL ON “HOT”

AM TOWER

CUSTOM MULTI-COAX, MULTI-CONDUCTOR ISOLATION INDUCTORS FOR CELLPHONE SERVICE ON “HOT”

AM TOWER

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© 2011 LBA Group, Inc., A ll Rights Reserv ed.

LBA Group, Inc.3400 Tupper Drive, Greenville, North Caro lina 27834 / 800-522-4464 / 252-757-0279 / Fax 252-752-9155 / Email: [email protected] / www.Lbagroup.com

CoLoPole system on an AM station tower in the Boston Area

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“Hot side” view of modular CoLoCoil units in place at AM radio station in Vermont

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Integrated CoLoCoil units can accommodate different carriers or

services

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AM – Cellular Colocation

Colocation system isolation for security and RF safety

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Clearwire WiMAX Colocation (Seattle)



Examples: AM – 4G Wireless Colocation

VZWHawaii

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ABA 2012 Hatfield & Dawson Consulting Engineers ABA 2012 Hatfield & Dawson Consulting Engineers Radio 9 Sao Paulo 100 kW

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ABA 2012 Hatfield & Dawson Consulting Engineers IBB Thailand 1 MW ABA 2012 Hatfield & Dawson Consulting Engineers WJR 50 kW



Questions

Stephen Lockwood, P.E.

[email protected]

206-783-9151

Documents

Appreciating Your Vertical Real Estate - Hatfield & Dawson