Consult & Design

Our experience covers the design of complex processes including all phases, stages and parts of an investment projects – spatial planning, engineering design for all necessary parts through a detailed feasibility study, followed by collecting the necessary source data for the site, analysis of the objectives set, preparation of a contract with the Investor, clearance of details related to the spatial planning, preparation of projects for all necessary design parts, such as: Architecture, Civil Engineering, Electrical Engineering, Water Supply and Sewerage, HVAC, Geodesy, Geology, Fire Safety, Plan for Safety and Health, Landscaping, Waste Management Project, etc.

We at ENGINEERING can help you both with the design of new facilities and with the modernization of existing ones.

Leading design units with appropriate responsibilities, when preparing investment projects

Our experience covers the design of complex processes including all phases, stages and parts of an investment projects – spatial planning, engineering design for all necessary parts through a detailed feasibility study, followed by collecting the necessary source data for the site, analysis of the objectives set, preparation of a contract with the Investor, clearance of details related to the spatial planning, preparation of projects for all necessary design parts, such as: Architecture, Civil Engineering, Electrical Engineering, Water Supply and Sewerage, HVAC, Geodesy, Geology, Fire Safety, Plan for Safety and Health, Landscaping, Waste Management Project, etc.

We at ENGINEERING can help you both with the design of new facilities and with the modernization of existing ones.


Part technological of the detail design project specifies the specific technological solutions that will be tailored to the requirements of the Contracting Authority, set out in the Bidding specifications, regulatory requirements and best practices in the field of design of the respective installations and facilities.

The technological part is presented in detail projects containing at least:

  • Technological plans and schemes of the proposed solutions;
  • Sections and axonometric diagrams to the technological plans and the individual facilities;
  • Machine drawings for non-standard and non-cataloged elements (jointly developed by a mechanical engineer in a separate stand-alone section of mechanical engineering).

Part technological is accompanied by an explanatory note, which describes at least:

The technology adopted in terms of its technical and economic indicators (productivity, specific energy costs, degree of mechanization, etc.);

  • Each technological solution provides information about the technological process, operating mode and layout solutions with justification of the necessary technical information to it;
  • The degree of mechanization of technological processes;
  • Selected technological equipment with detailed technical information;
  • Providing technology with pipelines for waste, drinking and sewage, air and more. (Autocad 2D, Revit 3D, Autocad Civil 3D);

The calculations of the part technological in the work design phase include, but are not limited to:

  • Technological calculations; Hydrodynamic calculations;
  • Specification of process equipment;

Quantitative account for construction and assembly works partly technological and Detailed quantitative account for all facilities individually.

Milk processing system
Reverse Osmosis Installation


Part architectural for detail design projects presents solutions for:

  • The architectural image of the building;
  • Functional and spatial composition of the building in accordance with the surrounding architectural and landscape environment;
  • Creating a sustainable, safe, hygienic and accessible architectural environment.
  • The necessary building materials and articles for the execution of construction works and the way of their processing, laying and / or installation;
  • Execution of waterproofing and thermal insulation of the site;
  • Provision of natural and artificial lighting in the premises;
  • The implementation of joinery, flooring, cladding and other types of finishing construction works in rooms, roofs and facades;

Part of the architectural phase project design provides the basis and prerequisites for a suitable construction and engineering solution and solution for the technical infrastructure and building installations.


The detail design project for the structural part is executed on the basis of the geological engineering report and design decisions in the work design phase for all parts requiring structural decisions. The constructor plays a leading role in accepting technological decisions regarding the design of non-standard facilities and buildings.

The design decision includes an explanatory note, static calculations justifying the design decisions, a graphical part in an appropriate scale and quantitative accounts.

Explanatory note

The explanatory note and the static calculations present the necessary baseline data; data on geological, hydrogeological studies, seismicity of the site area; will be substantiated and proven through design checks against the acceptability criteria of the adopted structural decisions and in accordance with the specific geological, hydrogeological and other conditions, the dimensions of the structural elements, the method of foundation, the foundation structures. The explanatory note also contains a description of the additional activities required by the specific terrain and hydrogeological conditions, data on the technical characteristics of the materials used and others at the discretion of the designer.


The demonstration of the carrying capacity and the operational suitability of the facilities, by appropriate calculations, shall be prepared in accordance with the regulations in force, including:

  • Eurocode: Basics for building design. constructions;
  • Eurocode 1: Impacts on structures;
  • Eurocode 2: Design of concrete and reinforced concrete structures;
  • Eurocode 3: Design of steel structures;
  • Eurocode 4: Design of composite reinforced concrete structures;
  • Eurocode 7: Geotechnical design;
  • Eurocode 8: Design of structures for seismic impacts;
  • National annexes to the Eurocodes;


In the graphic part of the project under the part “Constructive”, detailed information about the individual structures and details (CMD) is prepared, as well as the implementation of the different types of construction works. Detailed specifications of the reinforcement and steel elements used, the instructions for the production, construction and acceptance of structural elements of steel and reinforced concrete, as well as with respect to the ground, are also provided.

The project under the “Constructive” part is checked and stamped by the Technical control under the “Constructive” part, in accordance with the requirements of the Bulgarian legislation.


Part electrical covers power supply systems, electrical equipment, lightning protection and grounding of buildings, external facilities and open spaces according to the site master plan developed in the Architectural and Technological part.

Some of the following major design works can be developed in the Work Design phase:

  • External power supply (If required)
  • Electrical installations
    • External cable network
    • Internal electrical installations
    • District lighting
    • Lightning protection and grounding systems

The KIPiA system complies with the specific technological conditions and requirements. An exemplary process management system can be of a three-level hierarchical type. According to the applied topological structure (PLCs & SCADA) the system can consist of the following levels:

  • First level – covers instrumentation (QPI) devices that provide control of the process parameters and local control panels (LCP) of the equipment. The first level also includes the devices for monitoring the condition of the electric motors of the equipment (overheating, ingress of moisture into the engine) by means of built-in sensors and external devices for the formation of unified alarms;
  • Second level – covers the Motor Control Centers (MCC). They carry out the acceptance of the information from the control panel, the implementation of the set control algorithms, the output of control effects to the motors of the equipment. The proposed control and command system is based on programmable logic controllers (PLCs) connected to each other through an Industrial Ethernet communication network. The MCC provides human-machine interfaces – operator panels (OPs) for displaying information (data, alarm messages), as well as for accepting assignments and commands from the operator. IASs can be implemented with manual and automatic operation for each facility;
  • Third level – implemented by the supervisor management, collection and archiving of object data (SCADA). The SCADA system may consist of two operator stations operating independently of each other. The two operator stations are based on two personal computers with full functionality, located at a central control point (CCP) in the administrative building, allowing for round-the-clock monitoring of the operation of the IAS and the entire station. Operator stations display a color mimicry of the facilities depicting their status (running / not running / crash). The connection between the MCCs and SCADA can be two-way via Ethernet communication and allows the output of commands to the facilities, the formation of assignments to the PLCs by the operator in the CCP. More dynamic screens for the status of MCC technological systems are displayed on the operator station screens. The data for all major technological parameters are archived in a database. A log of the events for the operation of the facilities and a report of the emergency events are displayed, with the possibility of printing the displayed reports.


The project for the water supply and sewerage system will be developed on the basis of the technological project, the architectural project, including the General Plan and the legal and regulatory framework for the design, construction and operation of water supply and sewerage systems.

The Explanatory Note on the part of the water supply and sewerage system of the detail design projects contains: the way of supplying the site with drinking water, the need for raising the pressure and other specific requirements, if any, the internal water supply system for buildings (Autocad 2D and Revit 3D) provided in the project and the way of drainage and sewage treatment.

Part Water supply anf sewerage draws up an Situation Plan on an appropriate scale, showing the paths of the designed water and sewage sections with marked lengths, slopes and elevations of the pipes, location of inspection shafts, water quantities and facilities; Longitudinal profiles in an appropriate scale, with the vertical scale being 10 times smaller than the horizontal one, with the designation of the dimensioning shafts, the points of the inclined shaft and the pipe diameter, the points of intersections with other underground communications, the level of the existing terrain and the category of earthly work. Equipment details. The drawings for external water and / or sewerage networks include data on the estimated water quantities and velocities, slopes, headings, trench elevations, pipe bed, existing and projected terrain, breakage distances, detailed terrain points, facilities and fittings, horizontal and vertical distances to points of intersection with other underground ducts and structures, lengths of sections and types of pipes and fittings.

Plant for the mineralization of purified seawater


Industrial Ventilation

Part heat supply, ventilation and air-conditioning for detail design projects is made depending on the type and specificity of the site in sections of heating installations, ventilation installations and air-conditioning systems. The working project basically contains:

  • Explanatory notes – draws with for each building. The notes assess the required HVAC equipment, taking into account the design requirements for the type of buildings.
  • Drawings – basic architectural drawings of all buildings, indicating the location and manner of installation of the relevant appliances (HVAC);
  • Quantitative accounts – Detailed quantitative accounts will be drawn up for all types of activities related to the installation and delivery of HVAC equipment, etc


The detail design project involves, but is not limited to:

  • Explanatory notes – will be prepared for each building. They assess the necessary equipment and energy efficiency measures, taking into account the type of buildings.
  • Drawings – thermal engineering calculations of buildings; details related to additional thermal insulation
  • Quantity accounts – Detailed quantitative accounts will be drawn up for all types of activities related to thermal insulation, etc.


Part geodesy of a detail design project defines:

  • precise location of the objects in the master plan;
  • a working geodetic network for tracing and controlling the construction of sub-objects and the site as a whole;
  • the data for tracing and controlling the basic and detailed axes, during the construction and installation of large single objects or sub-objects in a complex of objects;
  • the vertical planning of the site and the exact elevation of the sub-sites.

The drawings of a geodetic part of a work project include:

  • Topographic plan – geodetic image containing all situational and terrain points within the scope of the site and reflected on it the current regulatory plan and the contour of the properties reflected in the cadastral map
  • Tracing plan – the existing regulatory plan and the contour of the properties reflected in the cadastral map reflect all newly designed buildings (including construction axes), facilities, communications, etc. A coordinate register of all situational objects and points of the working geodetic network that will be used in the tracing of the object is presented.
  • Vertical planning – the current regulatory plan and the contour of the properties reflected in the cadastral map with all newly designed buildings, facilities, communications and more. a vertical planning project is being developed. It is the height attachment of all sites to the infrastructure. If there is a technical vertical planning level (stored in the areas), the project is tied to the leveling. Indicate the position and height of the output leveling benchmark.
  • Earth mapping – on the basis of the vertical layout and the determined details for the different pavements, the volumes of excavation and embankments are determined.

Explanatory note to part geodetic of a work project contains:

  • data on the performed geodetic works, when no conceptual design was made or they were not reflected in it;
  • data on the working geodetic network – type, description of the solution, location of points, stabilization, tools, measurement, coordinate system, processing, results and accuracy;
  • starting point (s) for tracing and controlling, accepted tracing methods, accuracy, tools, stabilization;
  • justification of the design vertical decision for:
    • the whole site and for separate functionally separated sites;
    • individual buildings, structures, areas and spaces, streets, alleys, utility networks and their vertical interconnection;
  • the adopted scheme for drainage and removal of surface water, explaining the slopes of their adjacent terrains, pavement pavements, roads and sites;
  • basic elevations ± 0.00 of buildings and structures;
  • Horizontal displacement of earth masses, excavations, embankments, prescription for the placement of temporary and permanent landfill sites in coordination with part of the project for the organization and execution of construction (POIS), requirements for the rehabilitation of damaged areas, construction of facilities against landslides and erosion processes, etc .;
  • special modeling of terrestrial landforms (artificial hills, ridges, valleys, etc.).

The explanatory note shall be accompanied by:

  • lists of geodetic materials, diagrams of supporting networks, calculations and other data on the geodetic works performed on the site;
  • data required for the construction and other networks necessary for tracing and monitoring during construction and installation;
  • other data and materials required by the design assignment (design contract).

To geodetic part of the working project are made:

  • Quantitative account for the execution of earthworks and other types of construction works.


This section contains an explanatory note, drawings and a quantitative account. The explanatory note gives all the elements of the road surface, with the appropriate justification for its choice. The drawings contain the situation, longitudinal profiles and type cross-section. The quantitative account is made for the whole road surface in total for the site.

In the phase of a detail design project, the following are elaborated:

  • Longitudinal profiles in the appropriate scale for the pavement roads;
  • Cross sections in some at specific nodes;
  • Road type detail.
    • Typical cross-sections in embankment, trench and mixed
  • Scheme – Drainage plan
  • Flooring structures.


Part of the landscaping provide a complete solution on the adjacent territory in which the site is located, with a view to forming an environmentally and aesthetically pleasing environment. It is made according to the functional purpose of the objects.

Part of the landscaping is made on a geodetic photograph of the existing terrain, on which are drawn the designed buildings and the design elevations ± 0.00 and elevation plinth.

The development of a part of the park and landscaping is preceded by baseline studies and an overview of the terrain.

Part of the landscaping and landscaping of a working project decide:

  • area distribution and functional zoning;
  • the surface composition of the alleys;
  • plant formation relative to the spatial composition;
  • architectural forms and garden plastics.

The drawings of part of the park and the improvement of the work design include: architectural work projects and details for the architectural garden elements and, if necessary, structural designs for the garden elements, which represent construction facilities;

The drawings for the whole landscaped are made on the scale of the geodetic survey, and the details – on the appropriately chosen scales.

Part of parking and landscaping must contain:

  • situational plan;
  • sections clarifying the features of the existing and project terrain.

Part of the landscaping can be applied perspective and axonometric views, sketches, drawings, computer animations, layout, as well as conceptual designs of more significant garden architectural elements.

The Explanatory Note to Part Parking and Public Works contains:

  • justification for the functional and composite solution;
  • explanations for the selected materials for the project implementation;


This part is developed in accordance with the requirements of Art. 169, para. 1, item 2 of the Spatial Planning Act “… The works shall be designed, executed and maintained in accordance with the requirements of the normative acts and the technical specifications for ensuring during the economically justified operational life the essential requirements for fire safety”. It will also comply with annex 3 of Ordinance I – 1971 on construction and technical rules and regulations for fire safety.

The Explanatory Note to the Fire Safety part of the investment project includes:

  • general regulatory requirements, incl. requirements from other design parts, requirements from the design assignment;
  • the main characteristics of the products related to meeting the requirements (passive and active measures) for fire safety and meet the technical specifications laid down by the Product Technical Requirements Act;
  • justifications for decisions made regarding the degree of fire resistance of the building and its elements;
  • the justifications for the decisions taken and the ways of implementation of the coatings, incl. cross-section type of steel structural members: open profiles – P-profile; I-profile; L-profile; T-profile, etc .; closed profiles – (rectangular, square);
  • (circular profiles); Δ (triangular), etc., technology of application of flame retardants, external (atmospheric) conditions, minimum number of layers, etc.

Drawings on active fire safety measures include:

  • situation with the layout and data on the types of fire-extinguishing and warning, warning, smoke-exhaust systems, incl. the suction grilles of smoke and heat exhaust systems, the places of fresh air supply to the premises, the fire cocks, the evacuation signs, etc .;
  • plans for all floors of installations, sequence of actuation, interaction between them and safety systems;
  • evacuation plans and details of specific technical solutions.


The safety and health plan will be developed in accordance with Ordinance No. 2 on minimum requirements for health and safety at work when performing construction and assembly works, issued by the Ministry of Labor and Social Policy and the Ministry of Regional Development and Public Works. 

Health and safety part for detail design projects, including:

  • appropriate preventive measures based on risk assessment;
  • work equipment and workplace;
  • informing and consulting employees;
  • personal protective equipment;
  • physiological norms and rules for manual handling of weights;
  • sanitary and hygiene standards;
  • signs and signals;
  • fire and emergency safety;
  • electrical safety;
  • traffic organization and signaling of roads;
  • safe operation of high-risk equipment.

The Safety and Health Plan will contain:

  • organizational plan and construction situation plan;
  • a comprehensive chedule for the sequence of construction works;
  • Plans for the prevention and elimination of fires and accidents and for the evacuation of workers and those on the construction site;
  • measures and requirements to ensure the safety and health of the construction works, including for places with specific risks;
  • list of responsible persons (name, position, employer) for carrying out control and coordination of individual builders’ plans for the places where there are specific risks, and for evacuation, training and / or training;
  • List of installations, machines and equipment subject to control;
  • scheme of the sites on the construction site where two or more builders are expected to work;
  • scheme of sites at the site where there are specific risks;
  • layout of storage sites for construction products and equipment, temporary workshops and waste containers;
  • scheme and schedule for temporary artificial lighting at the construction site and workplaces;
  • layout of the sanitary facilities;
  • scheme for power supply with electricity, water, heating, sewerage, etc .;
  • scheme and type of alarm for disaster, accident, fire or accident, with a designated first aid location.


The draft for this part contains:

  • an explanatory note;
  • general information about the investment project;
  • construction waste (CW) generation forecast;
  • an estimate of the type and quantity of products of the utilized CW ;
  • measures to be taken in the management of the CWs formed


Part “Design-Budget Documentation (DBD)” is containing an explanatory note, quantitative accounts for the parts of the project for the types of construction works, equipment specifications, furnishings and more. The preparation of detailed quantitative accounts for all types of activities related to the realization of the site as a whole is part of the present development.


The design parts for the installations will not be limited to the above mentioned parts, they may include other indispensable developments that are included in the scope of the contract and the price quotation.