construction invoice

Construction accounting and quantity surveying: our services across all phases

Tendering phase
Quantity determination for tendering authorities and companies – including analysis of documents, digitization/georeferencing, derivation of project geometries and cross-sections, and position-accurate quantity compilation. The aim is to achieve transparent, standard-compliant quantities as the basis for a clear tender.

Bidding phase
Quantity determination for construction companies' bid calculations – detailed, verifiable, and with advice on the results to ensure that calculations are reliable and comparable.

Construction phase
Quantity determination for construction billing (earthworks, bound and unbound superstructure), output of test data according to REB procedure description, area and length measurements, position-related billing plans, and documentation with explanatory report. In addition, TRIGIS performs test calculations for the client (acceptance and verification of the contractor's quantity determination).

Quantity determination for tenders and bids

TRIGIS provides support in determining quantities for tenders or bids. We take care of complex data collection and transparent compilation of quantities:

• Surveys of the original terrain, if necessary (terrestrial, UAV)
• Digitization and georeferencing of tender documents
• Analysis of tender documents, service specifications, building descriptions, and other relevant contract components
• Review and evaluation of building site reports
• Derivation and determination of project geometries from planning documents
• Generation of detailed cross-sections from standard cross-sections, route parameters, and original terrain
• Comprehensive quantity determination from cross-sections (including homogeneous areas)
• Generation of route bands for earthworks balance
• Position-accurate compilation of the determined quantities and comparison with LV quantities
• Comprehensive advice to the client regarding the calculation results

In addition, we provide support in the following areas:

• Evaluation of ground surveys
• Detailed quantity determination
• Detailed quantity compilation

Quantity determination for construction billing

TRIGIS provides coordinated and qualified construction invoicing during the construction phase. Our services include:

Quantity determination for earthworks, bound and unbound superstructure

• Acceptance and review of the complete bill of quantities
• Analysis and coordination of the service items to be invoiced
• Quantity determination and output of test data in accordance with the respective REB procedure description from cross-sections and DGM
• Area and length measurements and creation of item-related billing plans
• Item-specific determination and compilation of results
• Documentation with explanatory report

Verification calculation for the client

• Acceptance of the contractor's quantity determination
• Verification of input data
• Execution and logging of quantity verification

Surveying for construction projects of all sizes

TRIGIS provides comprehensive surveying services for building construction and civil engineering. An overview of our services:

Surveying, consulting, and documentation during construction

• Takeover and inspection of the client's construction site, axes, and original terrain
• Creation and continuation of the required construction site and elevation network
• Review of the geometric planning basis
• Coordination of all geodetic and geotechnical surveying services
• Support with redesign and route planning in consultation with the client
• Data preparation and model generation for machine control
• Execution of all necessary stakeouts, measurements, and control measurements
• Deformation monitoring
• As-built documentation and output in all common file formats
• Pipeline documentation and manhole cadastre

Consulting for precise and economical surveying

Precise construction surveying is only as good as its planning and tendering. Even in the preparatory phase, clear definitions and the selection of the right methods can reduce costs and avoid additional work. TRIGIS supports clients in optimally calculating and managing surveying services.

Our consulting services:

• Support in cost-minimizing tendering for surveying services
• Compilation of the required surveying services
• Evaluation of cost-reducing technical alternatives
• Review and evaluation of existing surveying documents
• Support in the clear textual description of surveying services
• Consulting on the quantitative determination of surveying services (LV) to avoid additional costs
• Evaluation of the general market situation for various surveying services