Hamburg-Bergedorf, Germany Phone 040 66969 120Mobile 040 66969 121info@kalwer-netzbau.example
DEEN
Request a project
Menu
Crew in high-visibility clothing at a narrow trench in the footpath, a brick church tower in the background
Crew on the footpath · Civil works
View into the trench: microduct bundle in the sand bed next to an orange marker ball
Microduct bundle in the sand bed · FTTH network · 2 June 2022 · Großhansdorf-Schmalenbeck
Two installers at the van with cable drum and blowing equipment in front of an open street cabinet
Blowing at the street cabinet · Fibre installation
Installer on a ladder at the open power unit of a rapid charging station
Installing the power unit · E-mobility

Civil works, FTTH network construction, fibre installation and charging parks

Specialist contractor from Hamburg-Bergedorf. In civil works since 2011.

Civil works are our core trade. Fibre, splicing and charging parks build on it – all with our own crews.

Contractor
Kalwer Netzbau, Bergedorf
Founded
2011
Trades
Civil · FTTH · Fibre · E-mobility
Sites
Hamburg and surrounding area
Working hours
Mon–Fri 8 am – 5 pm
Request a project

01

Bill of quantities

Items as they appear in your bill of quantities. “Enquire” carries a trade's items straight into the form.

Workers resetting grey paving stones on a footpath, a wheelbarrow of grit beside them
Paving being reset · Civil works

01Civil works

Trenches, house connection trenches, hand excavation, traffic management and surfaces – with our own equipment and crews.

Cable and utility trenches, house connections, crossings and surface reinstatement.

ItemServiceUnit
01.10Open-cut cable trenchm
01.20House connection trenchpc
01.30Hand excavationm
01.40Surface reinstatementm²
01.50Traffic managementLS
01.60Measurement and photo docu­mentationLS

Details: Civil works Enquire: Civil works

Installer kneeling in lifted paving in front of a brick house, guiding microducts to the house wall
Microducts for the house connection · FTTH network

02FTTH network

Microduct bundles, house connections and building transfer points: the passive fibre infrastructure from the street cabinet to the basement.

From the street cabinet to the building transfer point, with building entry and documentation.

ItemServiceUnit
02.10Laying microduct bundlesm
02.20House connectionpc
02.30Building transfer pointpc
02.40Street cabinetpc
02.50Remedial and completion workLS

Details: FTTH network Enquire: FTTH network

Two installers at the van with cable drum and blowing equipment in front of an open street cabinet
Blowing at the street cabinet · Fibre installation

03Fibre installation

Blowing microcables, splicing in street cabinets, closures and transfer points, testing and documentation.

ItemServiceUnit
03.10Blowing microcablem
03.20Splicingsplice
03.30Splice trayspc
03.40Testingfibre
03.50DocumentationLS

Details: Fibre installation Enquire: Fibre installation

Installer on a ladder at the open power unit of a rapid charging station
Installing the power unit · E-mobility

04E-mobility

Rapid charging parks from the cable route to commissioning – trained by the manufacturer for rapid charging stations.

Cable routes, conduits and foundations for chargers on company premises, car parks and public spaces.

ItemServiceUnit
04.10Cable route and cable pullingm
04.20Foundations and conduitspc
04.30Installing rapid chargerspc
04.40Commissioningpc
04.50Maintenance and upgradepc

Details: E-mobility Enquire: E-mobility

02

Standard cross-section

A cable route in cross-section: surface, base course, backfill, warning tape, sand bed and duct bundle. Kalwer Netzbau builds every layer itself.

Trench width Cover Surface course Base course Backfill Warning tape Sand bed Duct bundle Charging point Foundation

  1. 01 · Civil works

    Trench

    Breaking up, excavation and shoring, then backfilling and compaction in layers.

  2. 02 · FTTH · Fibre

    Duct

    Microduct bundle and cable ducts to DIN 16874 in the sand bed with warning tape above; then blowing and splicing.

  3. 03 · E-mobility

    Connection

    Cable route to the charger's foundation, installation and commissioning of the station.

  4. 04 · Surface

    Finish

    Asphalt or paving reinstated and joined to the existing surface.

03

Area and references

Sites of recent years in Hamburg and the surrounding area, between the Alster, Bille and Elbe.

ElbeAlsterBilleStormarnVierlandeHarburger BergeSachsenwaldHamburgNorderstedtWedelHarburgPinnebergBergedorfBase · Fibre installation 2025Großhansdorf2022 · Civil works, FTTHNeu Wulmstorf2024 · E-mobility10 kmN
Schematic. Grey: orientation, blue: base and sites.
Area and references
YearPlaceTradeWork
2022Großhansdorf (Stormarn district)Civil works · FTTH networkCable trench, microduct bundle, surface
2024Neu Wulmstorf (Harburg district)E-mobilityBuilding a rapid charging park, testing
2025Hamburg-BergedorfFibre installationSplicing in the street cabinet
2025Service area on the A 1E-mobilityRapid charging station
All references

04

Site diary

Entries from our photo documentation – with date and place, as network operators require.

See all sites
  1. Open splice tray with colour-coded fibres in a street cabinetEnlarge photo

    · Hamburg-Bergedorf

    Splice tray in the street cabinet

    Fibre installation

  2. Test instrument in front of an open distribution cabinet, test leads connectedEnlarge photo

    · Neu Wulmstorf

    Testing at the distribution cabinet

    E-mobility

  3. Installers at a rapid charger in a cordoned-off car parkEnlarge photo

    · Neu Wulmstorf

    Building a rapid charging park

    E-mobility

  4. Residential street with a freshly asphalted strip along the kerb, brick houses behindEnlarge photo

    · Großhansdorf

    Route closed, asphalt reinstated

    Civil works

  5. Open trench beside the footpath, orange microducts at the bottomEnlarge photo

    · Großhansdorf

    Open trench with duct bundle

    FTTH network

  6. Coils of orange microduct at the edge of the trench, a plate compactor behind themEnlarge photo

    Duct coils and compactor along the route

    Civil works

  7. View into the trench: microduct bundle in the sand bed next to an orange marker ballEnlarge photo

    · Großhansdorf-Schmalenbeck

    Microduct bundle in the sand bed

    FTTH network

05

Company

Origins, capacity and certificates.

Origins

  • 2011 · Founded in Bergedorf
  • Four trades
  • Own crews and equipment
  • Based in Hamburg-Bergedorf

Kalwer Netzbau was founded in Bergedorf in 2011 as a civil works contractor. Trenches and cable routes grew into fibre house connections, fibre installation and rapid charging parks – the photos in the site diary show the sites of recent years.

We build with our own crews and equipment, for network operators, general contractors, municipalities and charging infrastructure operators in Hamburg and the surrounding area.

Company

Capacity

trades from a single source
4
in civil works – since the company was founded in Bergedorf
2011
crews
5
staff on site
26
vehicles and excavators
14

Certificate

Certificate of 14 November 2023

Manufacturer training in rapid charging technology

Jens Kalwer

See certificates

06

Contact

Request a project

Send us your bill of quantities, route plan or simply location and scope. We will get back to you personally.

Enquire now040 66969 121

Contractor
Kalwer Netzbau, Bergedorf
Phone
040 66969 120
Mobile
040 66969 121
Contact person
Jens Kalwer · j.kalwer@kalwer-netzbau.example
Working hours
Monday to Friday, 8 am – 5 pm