Mechanical Engineering

Concept design and feasibility study

Stemar Engineering will shape your ideas into a 2D or 3D design. Before the first Concept Design is made all the functional requirements and constraints are defined in a specification. The following issues are important for the Concept Design phase:

Function of the construction in process
Location of the structure
Use of material related to temperature, corrosion and environmental
Determining the load spectra
Desired lifetime

Based on the specification we will make one or more proposals and consult with you in a time. Through 3D visualization we will clarify the possible designs and identify possible obstacles. This allows you to provide your client with insight of the final product in the early stages of the project. In this stage simplified structural calculations are executed in order to verify the technical viability. For this concept stage we usually charge our hourly rates through regular time sheets as fixed prices or estimates prove to be difficult in practice.

We can also perform feasibility studies for renovation projects. Our focus is on the technical feasibility.

Basic Engineering

After the design concept is finalized and approved, the Basic Engineering is made. In this phase, all structural parts are dimensioned. This means that the sizes of the steel sections and wall thicknesses are determined. We analyse (dis-)assembly, transport and lifting to produce efficient assembly and short. At this stage, if required, the strength calculations are ecxecuted and reported.

Based on this engineering package construction companies can provide their quotation for the supply of the construction. In this phase the work is prepared by the supplier, who might give feedback about the compatibility between our design and their capabilities. The drawing package neither contains connection details nor material take-off lists yet.

Detail Engineering

Upon request of construction firms Stemar Engineering provide Detail Engineering , which includes work shop drawings, MTO's, sheet development drawings and cutting drawings. Often this phase includes the development of hoistingequipement and/or plans for mounting the structure.

After the structure is mounted and commissioned then the drawing package may be executed "As Built".

CE Marking

All machinery and pressure vessels must be supplied with a technical construction file and in most cases CE-marking is required. During the entire design process all risk must be minimized as a safe design is the first step to a safe installation.

All installations require a Risk Assessment. This forms the basis of the technical construction file. All risks are hereby identified and weighed. For unavoidable risks proposals will be assembled in an action plan. Risk Assessments apply to both existing and new installations or plants.

Our Design Software

Stemar have three CAD packages at their disposal. The choice depends on your desires, drawing standard and complexity of the project. The early stages of a project are mainly designed in 3D, whilst work shop drawings are made in 2D. Many of our clientsarchive their drawings in 2D AutoCAD-format, but delivery of variuos 3D-formats is also possible.

AutoCAD
We have nearly 25 years experience with AutoCAD. This package is known for its broad opportunities with 2D drawings, but we also apply Autocad frequently for its 3D capabilities.
HiCAD
Since November 2007 we work with HiCAD Next. This package is a 3D stand-alone package which can work "history-based" as well as "dynamic". This makes the design process more intuitive than with Inventor.We also have a structural steel module with which we can generate steel connections and details. The program allows automatic generation of mono-drawings and MTO's. This saves a lot of detail engineering hours.
Inventor Upon request we work with Inventor, but our preference is to work with AutoCAD or HiCAD. Because we own several licenses we are fully compatible with Inventor.
Raster Design This is an AutoCAD add-on to edit scanned drawings, which we mainly use for minor modification of archived drawings.
Sheet Lightning Stand-alone package Sheet Lightning automatically generates plate developments for a variety of shapes. We use this package mainly for hoppers and funnels in bulk handling machinery.