Curb & Gutter, Milling, Asphalt & Concrete Paving...High-precision milling is highly desirable, to...

Curb & Gutter, Milling, Asphalt & Concrete PavingMatthew D. Morrison

Leica Machine Control Division

Contents

OverviewWhat is Leica

System DetailsComponents

PaveSmart 3D?Customer Benefits

Conventional vs.

Data FlowKey FeaturesOperation3D Work Approach

ApplicationsCurb & Gutter

Operation

Asphalt Milling

Asphalt Paving

Mainline Slipforming

Leica PaveSmart 3D v2.0 – Dec 2009 - 2

sok1

sok2

Slide 2

sok1 During Presentation, click on the application you want to discussKarl Soar, 12/2/2009

sok2 Click on the PaveSmart 3D or Leica Geosystems logo to return to this Menu from anywhere in the presentationKarl Soar, 12/2/2009

What is Leica PaveSmart 3D?A 3D Machine Control system to simplify jobsite logistics, reduce costs and improve quality

Removes stringlines and pins from the jobsite Removes install & removal costs

Increases working safety, especially at night

Puts the 3D job design directly onto the machine Eliminates setting-out errors and stringline influences

No waiting for setting-out before production

No dependency on setting-out – work wherever you have 3D data

Increases productivity, quality and performance bonuses

Controls height, slope (and steer) of machinesControls height, slope (and steer) of machinesDelivers a precisely-constructed product

Optimises amount of new material needed

Reduces over-milling, overpouring


Improves job yields and material cost savings

Working with Stringline…

Inspect design – calculate setting-out lists for each lane

Setup a theodolite, survey each hub or pin position with total station (or GPS if accuracy isn’t important!)

H ( d ill) i h i i i 1 li f h l f t / h lt

ReferencePoint

Hammer (or drill) in each pin, minimum 1 line for each lane of concrete/asphalt

Check pin alignment & adjust if required

Survey and set stringline height on each pin (min. 2 men)

Install & tension clamps and stringlines

Walk left 5ft!Walk right 1ft!

Up a bit!Down a bit!

STOP!

“E b ll” & dj t t i li b f i

ReferencePoint

“Eyeball” & adjust stringlines before paving

Move machine into position, set sensors to stringline

Check machine position relative to stringlines

Start Production, monitor machine position


Ensure (or hope!) nothing disturbs or damages stringlines during paving/milling…

Working with Leica PaveSmart 3D…

Before project starts… C t t d i t 3D d lConvert pavement design to 3D model

Load model onto Leica computer

Throw away the pins!y p

On paving days only…Setup total stations

Start Paving

Move theodolites nearer to paver when maximum range is reached


PaveSmart 3DSystem Options for Curb & Gutter, Asphalt, Milling1-TPS (single total station)

All Asphalt pavers: height & slope control via MOBA-matic 2D system

<6m width use 1-prism mode

>6m width use 2-prism mode

Vögele Road Pavers with NaviTronic OP/Plus (screed width control steer options)Vögele Road Pavers with NaviTronic OP/Plus (screed-width control, steer options)

All Milling machines (Wirtgen or MOBA controlled)

Gomaco “Offset” (Curb & Gutter, barrier) single-steer concrete paver (GT-3200)

2-TPS (dual total station) or TPS + GNSS

Wirtgen SP150, SP250, SP500 concrete pavers with all-track steerg p

Gomaco GT3600, GT6300, GT3400 3-Track concrete pavers with all-track-steer

All asphalt pavers: dual height control (>6m screed width, Vögele or Moba)

Vögele tracked pavers requiring Automatic Steering Control


g p q g g(wheeled pavers cannot be steered automatically)

PaveSmart 3DSystem Options

Leica SolutionFactory Fit Sensor Options

1D/2D MOBAmatic

3D PaveSmart 3D

1D/2D:MOBAmatic or other factory-prepared system

y p

1D/2D Laser/Sonic

3D TPS/DualTPSMilling Machines

3D PaveSmart 3D

1D/2D MOBAmatic

factory-prepared system

1D/2D:MOBAmatic or other

3D TPS/DualTPS(PowerTracker)

1D/2D Laser/Sonic

Asphalt Pavers3D PaveSmart 3D

3D PaveSmart 3D

factory-prepared system

3D (stringline only):

3D TPS/DualTPS(PowerTracker)

3D TPS/DualTPSTPS GNSS

Curb & Gutter

Factory-installed system for stringline control

3D (stringline only):

TPS-GNSS(PowerTracker)

3D LMGS-S 3D DualTPS

Leica PaveSmart 3D v2.0 – Dec 2009 - 7Mainline Slipformers

3D (stringline only):Factory-installed system for stringline control

3D LMGS-S 3D DualTPSTPS1200 only

Click to return to Main MenuClick to return to Main Menu

C b & G tt & Off t P iCurb & Gutter & Offset PavingClick to return to Main Menu

Leica PaveSmart 3D for Curb & Gutter

Providing a precise, smooth, accurate curb for new asphalt is crucial for the quality, rideability, service life and whole-life costs of the new asphalt surface. Installing stringline for curb applications is costly and time-consuming, especially for tight radius work

Traditionally requires pre-survey, hubs and data to be provided to thehubs and data to be provided to the stringline crew This can lead to mistakes, and significant remedial costs & timeWith Leica PaveSmart 3D, machine steer, elevation and cross slope are automatically controlled without stringlines gLeica PaveSmart 3D improves operational safety on site and increases productivity, accuracy and efficiency


and efficiency

The 3D AdvantageUse digital data, directly from the design

No staking-out and stringline setup errors

No stakes hubs or stringlines requiredNo stakes, hubs or stringlines requiredEliminates most setting-out costsEasier jobsite logistics, truck accessWork easier in narrow work corridors

No waiting on surveyors, stringline crews, grade checkers etc.

Improved machine productivityWork anywhere you have data, not where the stringlines happen to be ready forWork any time of day or night

Increased safetyyNo more ‘trip hazards’, ideal for hazardous worksites (e.g. highway lane rentals)

Increased productivity


More work done right the first time, and faster

Curb & Gutter1 TPS Option – 1-Track-Steer

Machine

360⁰ Prism

Reference Point (Hub)

Machine Computer, Radios

SlSlopeSensor

TPS #1(Guidance)

No rear-steer

TPS #2(As-builts &

Leapfrog)R f



Curb & Gutter2 TCA Option – All-Track-Steer

360⁰ P i


Machine Computer

360⁰ Prisms

RadiosSlopeSensor

TPS #2(Guidance)

Rear Steer

TPS #1(Guidance)

Rear Steer enabled

Optional TPS #3(As builts &R f


(As-builts & Leapfrog)

Reference Fixpoint (Hub)

“GNSS Assist” Optionfor All-Track-Steer machines

Machine Computer

⁰

GNSS ReferenceStation

GPS/GLONASS Rover Antenna

360⁰ Prism

Reference Fixpoint (Hub)

RadiosSlopeSensor

Rear Steer

PowerBoxGNSS Receiver

TPS #1

Rear Steer enabled

TPS #1(Guidance)

TPS #2(As-builts &

Leapfrog)Reference


Leapfrog)Reference Fixpoint (Hub)

Curb & Gutter – Small Radii Parking LotsFred Weber, St Louis, Missouri, USA, Summer 2009

Billy Graves, Foreman, Fred Weber:“We would figure on finishingonly two islands a day withhandforming. With GOMACO and Leica, we’re doing eight a day. It’s a big advantage for us and giving ussome excellent production...”

“We’re now slipping the radii and the straightaways and the Leica isthe straightaways and the Leica is doing a great job. We’re averaging around 18 feet (5.5 m) per minutewith no string.”

Leica PaveSmart 3D v2.0 – Dec 2009 - 15http://www.gomaco.com/downloads/gomworld37_2.pdf

Complex Curb – Parking Lots

Prism

Atlanta Curb & Gutter, Georgia, USA, 2007

Prism

GPS

SlopeSensor

Leica Machine Computerp


Subdivisions…Keenum Construction, Alabama, USA, 2006


Special Applications – “Offset Paving”Concrete Curb & Gutter Concrete Barrier

Concrete Monolithic Concrete Pavements



Asphalt Milling Applications

Click to return to Main Menu

Leica PaveSmart 3D for MillingLeica PaveSmart 3D improves operational safety on site, increases productivity, accuracy and efficiency.

Providing a precise, smooth, accurate foundation surface for new asphalt is crucial for the quality, rideability, service life and whole-life costs of the new asphalt surface.

High-precision milling is highly desirable, to minimise the cost of new asphalt.

Increasingly, modern roads are being re-engineered to meet higher traffic speed and axle-load demands. Milling machines are used to remove varying depths of material, or alter the surface levels, profile and drainage characteristic of the road surface.

Traditionally this is a complex, manual process, often requiring a great deal of pre-survey, and detailed manual road-design data to be provided to the machine crew at all times. This can lead to mistakes, over-milling and subsequently higher costs to reinstate more asphalt than is neededreinstate more asphalt than is needed.

Leica PaveSmart 3D measures the machine’s position and adjusts milling depth and cross-slope automatically.

Sideplate (yoyo regulated) milling depth control is also fully integrated


Sideplate (yoyo-regulated) milling depth control is also fully integrated

Advantages of 3D MillingRe-profiling of existing surface geometries

Ideal for improving existing road profiles and construction layer thicknesses

Re-profiles elevation, cross-slope, curves etc

No staking-out and stringline setup errors

Removes existing road-surface irregularities (bumps dishes)(bumps, dishes)

“Perfect” milled sub-surface for new asphalt

No stakes or stringlines requiredReduced costs of setting out easier siteReduced costs of setting out, easier site access for trucks

Jobs can be done in narrower work corridors

No waiting on surveyor, stringline crew, grade checker etc

ExistingDeterioratedSurface

New 3D Design“Strings”grade checker etc.

Increased safetyNo ‘trip hazards’, ideal for hazardous worksites (e.g. highway lane rentals)

Unlike conventional milling with mechanical/sonic sensors referencing existing road surface, with 3D these

i l iti l t l “i d”

g


Ideal for night-time working irregularities are completely “ignored”

Leica PaveSmart 3D for MillingLeica enjoy a 10-year development relationship with Wirtgen Group

Wirtgen Group are the worldwide leader in milling applications & technology

PaveSmart 3D is the only factory approved 3D system on the market todayPaveSmart 3D is the only factory-approved 3D system on the market today

Fully-integrated with all W2xxx Series milling machines

Supports all DLS and LevelPro controllers

No after-market hydraulics to installNo after market hydraulics to install

Little or no retraining of operators – 3D works just like any other sensor

Supports all other major brands, via MOBAmatic levelling systemCAT/BitelliDynapac/Svedala ( Atlas Copco )ABG ( Volvo )MariniMariniRoadTecSakai


Working in 3D is easier and faster…One time, before project starts…

Install 3D system hardware: 4 hrs with plug & play no add on hydraulics4 hrs with plug & play, no add-on hydraulics

Prepare 3D alignment data

Load 3D data onto Leica machine computer

Calibrate machine sensors and h dra licsCalibrate machine sensors and hydraulics

On milling days/nights only (20 mins prep.)T hi tTurn on machine computer

Setup & orientate instrument(s)

Select required 3D data (“lanes”)

V if ff t f d l tVerify offsets for grade, slope, steer

Start Production

Check “as-milled” accuracy periodically


3D Milling ConfigurationAll Machines

360⁰ PrismNominal accuracy : +/-5mm at 200m * Nominal working Range : +/- 200m from instrument‘Leapfrog’ for continuous production

As-built Control

Leapfrog for continuous production

Total Station #2(As-builts & Leapfrog)

Total Station #1Guidance Dual Slope

Sensor

Machine Computer& Radios

Sensor


PaveSmart 3D for MillingWorking Process

Example Multi-lane 3D Milling Process1 Left Side: 3D Height

“3D Side”

1. Left Side: 3D Height Right Side: 3D Slope (from 3D model)

2. Left Side: 3D Height Right Side: Sideplate sensing off Lane 11

3. Left Side: 3D Height Right Side: Sideplate sensing off Lane 2

23

Technical Advantages3D-controlled height of 1st lane is always the

“Slope/Sideplate Side”

g yreference for sideplate-height reference of next lane

No “slope-error” propagation across lanes

Sideplate sensing ensures perfect “joint matching” for


optimal asphalt overlay construction joints

PaveSmart 3D for MillingFully Integrated with Wirtgen Machines

Prism

Mast

Slope sensor for accurate 3D mast3D mast compensation

Existing Wirtgen DLS or LevelPro controllers & slope sensor


PaveSmart 3D for MillingFully Integrated with Wirtgen Machines

Leica Machine Computer

WirtgenWirtgen LevelProController

Robust CAN-Bus communicationRobust CAN-Bus communicationNo hydraulics to install/maintainFully-integrated with Wirtgen DLS & LevelPro controllers


No operator retraining

PaveSmart 3D for other Milling MachinesSystem Overview – e.g. Dynapac


DynapacController(integrated MOBA system)

Robust CAN-Bus communicationRobust CAN Bus communicationNo hydraulics to install/maintainFully-integrated with MOBA OEM2D levelling systems


No operator retraining


Asphalt Paving Applications


Leica PaveSmart 3D for Asphalt Paving

Providing a precise, smooth, accurate foundation surface for new asphalt is crucial for the quality, rideability, service life and whole-life costs of new asphalt surfaceslife costs of new asphalt surfaces

High-precision paving is highly desirable, to minimise the cost of new asphalt

Increasingly, modern roads are being re-engineered to meet higher traffic speed and axle-load demands. Pavers are used to place varying depths of material, or alter the surface levels, profile and drainage characteristic of the road surface.

Traditionally this is a complex, manual process, often requiring a great deal of pre-survey, and detailed manual road-design data to be provided to the machine crew at su ey, a d deta ed a ua oad des g data to be p o ded to t e ac e c e atall times. This can lead to mistakes, over-paving and subsequently higher costs to place more asphalt than is needed.

With Leica PaveSmart 3D, the position, design height and cross slope are automatically controlledautomatically controlled

Leica PaveSmart 3D improves operational safety, removes logistics problems associated with stringlines on the site and increases productivity, accuracy and efficiency


3D Asphalt Paving Configuration #1Machines under 6m screed width

360⁰ PrismNominal Accuracy : +/-5mm at 200m * Working Range : +/- 200m from instrument *

As-built Control‘Leapfrog’ capability for continuous production

Total Station #2(As-builts & Leapfrogs)

Dual Slope

Total Station #13D Control


Dual Slope Sensor


3D Control

3D Asphalt Paving Configuration #2”Dual 3D Height” & Voegele “Auto-Steering” Options

Prisms

Nominal Accuracy : +/-5mm at 200m * Working Range : +/- 200m from instrument * Prisms

As-built Control‘Leapfrog’ for continuous production

TPS #23D C t l

Dual Slope

3D Control

TPS #3(As-builts & Leapfrogs)

TPS #13D Control


Dual Slope Sensor


3 Co t o

Applications - Asphalt PavingPaveSmart 3D Vögele Super 1600-2 with NaviTronic OP

Dual Prism Mode(AutoSteer - Tracked Pavers only)

Single Prism Mode(Manual Steering – all machines)


Applications - Asphalt PavingAutoSteer/AutoScreed Vögele with NaviTronic OP


Customer: Maeda, Japan, Oct 2009


Mainline Slipform Paving & Fi G d T i i ith LMGS SFine-Grade Trimming with LMGS-SClick to return to Main Menu

Why go “Stringless”? y g gCould your paving projects benefit from…

no marking-out and drilling to setup pins and guidewires?…no marking-out and drilling to setup pins and guidewires?

…easier paving in “zero clearance” situations, e.g. bridge decks, urban streets, railway cuttings, tunnels, narrow motorway lanes?

…no special access/safety equipment to pave in tunnels?

…no pre-production planning – just arrive, pave anywhere, any time?

…no human error from stringline setup?

…no inaccuracy of “field model” compared to original “office design”? y p g g

…lower material costs, improved concrete yield (less waste)?


Why go “Stringless”? Because stringlines…

… are expensive, time-consuming and error-prone to install p g p

… can be easily damaged during paving

… can be easily misaligned… can be easily misaligned

… can be a significant site safety hazard

interfere with site logistics increase concrete delivery… interfere with site logistics, increase concrete delivery

time, haulage costs, and reduce productivity.

require pre-production planning & increase survey effort/cost… require pre production planning & increase survey effort/cost

… don’t always “model” the designed surface accurately


What is PaveSmart 3D (LMGS-S)?

A 3D Machine Control system simplifying slipform jobsite logistics, reducing cost, improving quality and productivity

Specifically for mainline (slab) pavers

Result of 10 years experience in worldwide 3D slipformingy p p g

Developed in close cooperation with paver manufacturers

Eliminates stringlines (“stringless control”)g ( g )

Controls paver elevation, steer, slope and draft

Constructs directly from the 3D plansy p

Removes need for stringline set-out crew

Minimises pre-production planning and preparation


Minimises pre production planning and preparation

Some completed & current Projects Airports

Military: RAF/USAF Fairford (UK); USAF Kirtland (NM, USA); USAF Lakenheath (UK); Belle Chasse Naval Reserve New Orleans, LO (USA); Homer Regional Airport, LO (USA); Travis USAF Cal USA; El Centro Cal, USA Vi i G l ti S t N M i J k ill USAF Fl idUSA; Virgin Galactic Spaceport, New Mexico; Jacksonville USAF, Florida

Civil: Zurich & Basel International (Switzerland); London Heathrow & Stansted, Edinburgh Intl., Farnborough, Luton Intl. (UK); Paris Charles de Gaulle (France); Atlanta Hartsfield Jackson Intl., Baton Rouge; St Louis; Indianapolis; Toulouse (France); Chicago O’Hare; Guadeloupe (Caribbean); Paris Orly (France); Charlotte, NC, USA; JFK Airport, New York, USA

HighwaysE40 Ghent-Brussels, Belgium (4 x 10km); I-30 Dallas-Fort Worth, USA (4 x 20km); Pacific Coast Highway Australia (4 x 11km); A1 Peterborough UK (2 x 15km);Pacific Coast Highway Australia (4 x 11km); A1, Peterborough UK (2 x 15km);E67 Prague-Wroclaw Czech Republic (30km); E462 Brno (Czech Rep).; Overlay Projects, Iowa, USA; I-75 Atlanta, USA; I-95 Coco Beach, Florida, USA

TunnelsTunnelsSophia Rail Tunnels, Rotterdam, 11km (Netherlands); Channel Tunnel Rail Link, 35km, London (UK)Madrid Metro, Spain (20km), Rail Tunnel Malmo (Sweden), Finnetunnel Erfurt-Leipzig (Germany)

High-Speed Rail (Rigid Trackbed)


High Speed Rail (Rigid Trackbed)Koln-Frankfurt ICE, Germany, 2 x 120km; Nürnberg-Munich ICE, Germany, 2 x 100km

Stringless System for Gomaco Trimmers System Components

M hi

360⁰ PrismReference

PointReference

Point

Machine Computer

Radios

SlopeSensor

#

Theodolite #2(As-builts & Leapfrog)


Theodolite #1(Guidance)

Stringless System for Gomaco Placer/Spreaders System Components

Machine Computer

Radio

360⁰ Prism or GNSSReference

Point

TPS #2Slope

Sensor

TPS #2Optional for

Leapfrog

TPS #1(Guidance)


ReferencePoint

Stringless System for Gomaco Pavers System Components

MachinePrism Machine Computer

Radios

SlopeSensors

Prism ReferencePoint

Sensors

TPS #1(Guidance)

TPS #3


TPS #2(Guidance)

TPS #3(As-builts & Leapfrog)

ReferencePoint

Stringless System for Wirtgen Pavers

Leica Computer& Radios

System Components

& Radios

ReferencePoint

Leica Slope Sensors

TPS #2

TPS #1

TPS #2(Guidance)

TPS #3(As-builts & L f )

ReferencePoint


TPS #1(Guidance)

Leapfrog)

Stringless System for G&Z Pavers System Components

Prism Prism

Machine Computer,“BlackBox”

Interface& Radios

Slope Sensors


Stringless System for G&Z Pavers Interfacing to G&Z controller…


Leica “BlackBox”CAN Analog converter

(emulates stringline sensor inputs to G&Z controller)


Faster, more accurate trimming…Optimal subgrade saves concrete and improves rideability


Smoother airfield paving… Increases runway life, reduces undercarriage & tyre wear


Smoother road paving… Increases road life, reduces vehicle wear & passenger fatigue


Smoother road paving… Earns higher contractor Performance Bonuses


Zero-clearance paving…Delivers complex projects with less planning & costs


Improved site logistics…Keeps the traffic moving (up to 6 lanes of live traffic)


Special Applications – Mainline Concrete Paving

15m radius with 2 TPS setup Wirtgen SP250 4-track slipform paver


Special Applications – Mainline Concrete Paving

Wirtgen SP1600 4-track Slipform Paver, 12.5m width, Pacific Coast Highway – Brisbane-Sydney, Australia, 2005


g y y y, ,

Special Applications – Köln-Frankfurt ICE RailtrackComplex high-speed rail geometry, up to 11% cross-slope


Special Applications – Tunnel Paving

Wirtgen SP500 “3-track” Slipform Paver, 2.5m width, “Nuevas Ministerios” Metro, Madrid, Spain, 2005


, , p ,


Gomaco GT-6300 Commander III 4-track Slipform Paver, 2 x 18km, 1.5m escape walkway, Channel Tunnel Rail Link,


, p y, ,London, UK, 2003


Gomaco GT-6300 Commander III 4-track Slipform Paver, 2 x 7km tunnels, ICE Finnetunnel, Erfurt-Leipzig,


, , p g,Germany, Nov 2009


System Details


ComponentsLeica MPC1310 Machine Computer

Microsoft Windows®RuggedisedHousing XP Embedded

Operating Range -20°C to +60°C

SVGA Colour Touchscreen

Housing

MilSpec connectorsPower max 2A, 9-30VDC

CE & FCC appro alCE & FCC approval

IP65 HousingDaylight-readable displayy g p y

4 x RS232 Ports

CANBus & Power

USB Port


Componentsp3D Sensors – Leica RedLine

World’s most accurate total stations

Fully robotic operation

Automatic prism tracking

Simple setup and position fix

Can be used for any surveying tasks

10 12H t t10-12Hz measurement rate

Backlight & heater for night operation

Typical working Range ± 200m (600ft)Typical working Range ± 200m (600ft)

Tracking accuracy ±3mm at 100m (300ft)


Componentsp3D Sensors – Leica System 1200+

World’s most accurate total stations

Fully robotic operation

Automatic prism tracking

Simple setup and position fix

Can be used for any surveying tasks

10 12H t t10-12Hz measurement rate

Backlight & heater for night operation

Typical working Range ± 200m (600ft)Typical working Range ± 200m (600ft)

Tracking accuracy ±3mm at 100m (300ft)


Data Flow – LandXML

All major CAD platforms produce files for Leica PaveSmart 3DLandXML converts directly to Leica DBX format

CAD System

Leica DBX


Operation – Work Screen

Dashboard(Status & Warnings, ProductionTroubleshooting)

ProductionMonitoring

PositionC t lControlOutputs

ProjectPlan

OperatorMenu

View(click for more)

Clean, simple user interfaceAll ti l d ti i f ti il bl t l


All essential production information available at-a-glance

Operation – Offsets

Fully flexible operation – work where you need toUser-adjustable elevation & slope offsetsUser adjustable working position (indicate only on asphalt pavers & mills)


User-adjustable working position (indicate-only on asphalt pavers & mills)

Operation – Projects & Jobs

Multiple Job Selection

within Project

Select Machine and Control System


Operation – GraphicsInspect design grades and lines before working…

In 3D or 2D, from any perspective...


Operation – Easy ConfigurationSetup and machine dimensions

Dual-prism or prism+slope h i ht t lheight control

Simple configuration

Accurate 3D controlAccurate 3D control


Operation – Safety FeaturesNever pave, mill or trim out of tolerance…

Hydraulic Locks & Timeouts


Production Tolerance Stop Rules Instrument Safety Checks

Handling & TransportConvenient carry-case concept

All on-machine components come in one rugged carry-case

Machine PCRadiosCablesPrismsDocumentation

Quick & easy to install & remove

Reduces risk of theft & vandalism

Essential components safely stored away overnight

Instruments in separate cases


Instruments in separate cases

Thank YOU for YOUR attention!!!

Please feel free to contact me at ay time by any of the listed means below:Please feel free to contact me at ay time by any of the listed means below:

Matthew D. Morrison

Paving & Key Accounts Managerg y g

Leica Machine Control

(616) 821-1812 Cell

(616) 464-3270 Direct

(616) 949-7430 Ext. 270

matthew morrison@leicaus [email protected]

Leica Geosystems, Inc.

3498 KRAFT AVE SE


Kentwood MI 49512-2032

www.leica-geosystems.com

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