RTec EXPERT is a versatile structural engineering programme collection, which can be applied to standard as well as challenging high end engineering problems. The tool collection provides the following advantages:

• object-oriented, context-sensitive working environment with an overview at one glance
• fully graphic-oriented input with overview at one glance and optimum control of all modifications
• graphics with sensitive elements and chain dimensioning as well as immediate indication of all modifications
• powerful calculation and design functions
• usage of templates and detailed online support
• generation of construction drafts for the further processing in ZEICON® or other CAD-systems

RTec EXPERT

Collection of design tools under Windows® for engineering proofs with simple handling as well as graphically interactive input, calculation and output of the results. Some individual proofs also provide information and suggestions on the construction of the processed structural members. This particularly includes CAD drawings for the reinforcement. The collection contains the following engineering proofs for different materials, such as

RTbeam EXPERT - Continuous rc-beam incl. reinforcement drawing & prestressing

Windows® programme for the design of continuous reinforced concrete beams with a graphically interactive working environment for the in- and output. Straight continuous beams including single span reinforced concrete beams and cantilever reinforced concrete beams can be designed with the help of this tool. The programme also facilitates the analysis of variable cross-sectional distributions and the creation of rein-forcement drawings. Reinforced concrete design is possible for structural engineering tasks according to DIN 1045, DIN 1045-1, EN 1992-1-1 and corresponding NADs for DE, AT, SK/CZ and UK.   In detail, RTbeam allows the solution of the following tasks:

• homogeneous cross sections of rectangles, T-beams, slabs and I-beams with variable chord widths
• variable cross-sectional distribution including cross-sectional jumps
• simple symmetrical, exceptionally even asymmetrical cross-sectional forms are possible, these however have to be designed uniaxially.
• static systems with unlimited amount of fields with automatic consideration of effective widths of slabs for the evaluation of stress resultants
• consideration optionally of regular concrete quality (until C50/60) or high-performance concrete (C55/67 to C100/115)
• rigid or elastic support with automatic evaluation of the spring properties
• load cases can be given arbitrarily with different superposition and design attributes
• system is categorically applied as a downsprue system, with the exterior short time and permanent loads being effective simultaneously
• load cases can be put together arbitrarily out of concentrated loads and trapezoidal loads
• linear stress resultant evaluation with automatic formation of all design combinations
• linear stress resultant evaluation with moment redistribution considering the limits of redistribution
• stress resultants can also be calculated externally and entered into the programme
• comprehensive reinforced steel design for Ultimate Limit State (ULS), Servicability Limit State (SLS) and Fatigue Limit State (FLS) for the observation period to = 28 days
• evaluation of deformations in cracked condition with effective stiffnesses as a non-linear FE calculation
• evaluation of envelope of required reinforcement steel (As) for the longitudinal reinforcement due to ULS, SLS, FLS due to bending stresses
• evaluation of envelope of required reinforcement steel due to shear force and torsion
• design of geometrical discontinuity areas, such as box outs and settled supports (design of notches according to the Fingerloos/Stenzel method)
• consideration of constructive fire protection requirements according design tables 
• output of the results as short printout or as configureable output list

Additionally to precast prestressing with multiple strings, prestressing with subsequent bond or/and unbonded prestressing are possible with this option. The graphically interactive working environment facilitates the processing of the tendon geometry as a straight or as an arbitrary parable with a presetting of geometry via support locations in the dialogue. In the event of subsequent prestressing, a standard geometry can be generated automatically. This programme option also contains the following functions:

• bonded/unbonded prestressing or instant cohesion
• up to 4 stressing conditions for subsequent prestressing
• prestressed concrete design for structural engineering considering creep, shrinkage and relaxation
• comprehensive prestressed concrete design for Ultimate Limit State (ULS), Servicability Limit State (SLS) and Fatigue Limit State (FLS)
• evaluation of the reinforcement against tensile for precast prestressing with instant cohesion
• the verifications are performed for the observation period of to = 7 days and t = infinite

The output control of the result list is performed in three steps. The print out of input parameters, stress resultants, bearing sizes, verification types (e.g. bending, cracking, fatique or stress verifications) etc. can be controlled globally. The output format (short or/and detailed output) can be defined for each time step of design. Additionally, detailed outputs can be set up optionally for different automatically generated output cross sections. For testing reasons, the results can also be viewed in a clearly arranged manner via a result preview, additionally to the complete output list with graphics.

RTbeam EXPERT contains an interactively controlled reinforcement design for cross sections that are constant in each field, including subsequent generation reinforcement placement. The following information is taken over into the reinforcement drawing:

• geometry and design information
• constructive reinforcement design
• Information on As envelopes of longitudinal and stirrup reinforcement
  The reinforcement drawing can be directly transferred to ZEICON® as a ZAC macro or in the DXF format via ZACView to any CAD system.

RTbest EXPERT - Reinforced Concrete Column for general x-sections

BEST EXPERT is a Windows® programme for the design of single or multi-storey reinforced concrete columns in the limit state of bearing capacity due to structure deformations (buckling analysis and design) with a graphically interactive working environment for the input and output. The calculation is categorically performed biaxially according to linear and nonlinear deformation theories considering as well effective stiffnesses in the cracked condition. This application additionally supports the following calculation options:

• regular cross sections can be graded according to storeys and arranged eccentrically
• the reinforcement can be distributed evenly over the extent or arranged as individual reinforcement in the corners of the cross section
• reinforcement can remain constant along a column or be graded according to each beam
• different static systems can be investigated in their transportation, assembly and final states via a completed calculation
• the predeformations are supposed affine to the buckled shape or in the form of a skew attitude
• creep deformations can be considered
• supports can be rigid or elastic
• loads can be entered as point loads, eccentric point loads and linearly variable line loads as well as preset translations and rotations
• the dead load of columns is formed automatically and considered on request
• there is specific input support for the formation of design combinations
• partial safety and combination factors are formed automatically per load case attribute
• design for permanent, transient and extraordinary design situations
• design is performed for biaxial bending with normal force and shear optionally according to DIN 1045, DIN 1045-1, EN 1992-1-1 and according NAs for DE, AT, SK/CZ and UK 
• evaluation of the steel stresses in the limit state of serviceability
  Additionally to the already mentioned options of use, BEST EXPERT contains the following additional features:
• polygonal cross sections with rectangular, circular or polygonal box outs
• graphical construction environment for the cross section processing with DXF interface and tabular processing option of the polygon points
• linearly variable stem course (trapered cross-sectional distribution)
• prestressing in longitudinal direction for each stage
• arbitrary reinforcement distribution, also with specific reinforcement presetting
• arbitrary stress-strain-line for concrete, reinforcement steel and prestressed steel for deformation and design
• consideration of constructive fire protection requirements according design tables 
• presetting of variable limit strains for the evaluation of sustainable stress resultants

For testing reasons, the results can also be shown in a clearly arranged manner via a result preview, additionally to the complete output list with graphics. Comparisons with the model column method can be made particularly because of the indication of the effective flexural rigidities. BEST EXPERT is an extraordinarily powerful structural engineering application for an economic calculation and design of arbitrary column systems. Even demanding engineering tasks within this field of application can be solved with this programme.

RTfooting EXPERT - RC-Footing, arbitrarily shape incl. circular-, block- &tubular footings

Windows® programme for the design of reinforced concrete footings as rectangular and circular slabs, as block and sleeve foundations as well as polygonal foundations with a graphically interactive working environment for all in- and output. There are the following input and processing options:

• graphically interactive processing of block, circular and sleeve foundations as well as polygonal foundations
• presetting of different water zones and backfillings
• input of loads in the column connection as well as arbitrary point or area loads on the slab
• column loads can be transferred from colums design and different load combinations can be preset
• configuration of the result list and presetting of arbitrary design sections
• graphical construction environment for the processing of polygonal slab geometries with DXF interface and tabular processing option of polygonal points
• presetting of a smooth / rough formwork as well as of the bond area of a sleeve design
  The application supports the following calculation and design methods:
• verification and dimensioning of arbitrary polygonal foundation slabs with integrated as well as superimposed sleeve or as block foundation according to DIN 1045, DIN 1045-1 or EN 1992-1-1 and according NAs for DE, AT, SK/CZ and UK 
• soil-mechanics verifications and reinforced concrete verifications for individual load cases and load case combinations
• calculation of the soil pressures with a double eccentricity for arbitrary geometry of slab
• determination of the position of the neutral axis with a gaping joint for arbitrary geometry of slab
• verifications of the bearing capacity safety and sliding safety for arbitrary geometry of slab
• verification and dimensioning of arbitrary polygonal foundation slabs with integrated as well as superimposed sleeve or as block foundation according to DIN 1045, DIN 1045-1 or EN 1992-1-1 and according NAs for DE, AT, SK/CZ and UK 
• design of sleeve according to DIN 1045, DIN 1045-1 or EN 1992-1-1 and according NAs for DE, AT, SK/CZ and UK 
• bending and shear design of slab at generated or selected sections
• punching verifications for circularly and rectangularly connected columns according to DIN 1045 and DIN 1045-1 for arbitrary slab geometry

A construction suggestion for the reinforcement design can be created. For rectangular foundation slabs, the reinforcement drawing can be transferred directly into ZEICON® as a ZAC macro, or in the DXF format via ZACView to any CAD system. This enhancement makes the application of RTfooting EXPERT an enormously powerful structural engineering application for an economic calculation and design of arbitrary foundations. Even technically demanding engineering tasks can be solved in this field of application.

RTzwax - Design of rc- and prestressed concrete x-sections

Windows® programme with graphically interactive working environment for the design of arbitrarily polygonal reinforced concrete and prestressed concrete cross sections for biaxial bending with normal force. The design basis are optionally the regulations of DIN 1045, DIN 1045-1, EN 1992-1 and according NAs for DE, AT, SK/CZ and UK . Further arbitrary material values//properties can be determined. Thus, also other standard regulations can be considered. There are the following input and processing options:

• polygonal cross sections with rectangular and circular or polygonal box outs
• graphically interactive processing of composed cross sections
• graphical construction environment for the processing of polygonal cross section geometries with DXF interface and tabular processing option of the polygonal points
• different cross sections can be processed simultaneously with different stress states 
• presetting of different material values for concrete material, reinforcement steel and prestressed steel
• the reinforcement can be evenly distributed over the perimeter or arranged as a individual reinforcement in the corners of the cross section
• presetting of the reinforcement with different priorisations
• configuration of the result list

The following verifications can be made:

• ultimate limit states of bearing capacity for biaxial bending with normal force
• design for the unfavourable load case with preset stress resultants
• strain analysis under service load
• strain analysis in ultimate limit state of bearing capacity
• calculation of stress resultants at presetting of strain state caused by edge strains and direction of neutral axis
• stresses in non-prestressed individual - or line reinforcements
• calculation of the soil pressure for foundations with gaping joint

The graphical output contains a system sketch of the concrete cross sections including reinforcements as well as the centre of gravity and the principal axes' directions.  In rupture strength analysis and the preset strain state, the graphic contains the neutral axis as well as the lines parallel to the neutral axes with the maximum and minimum strains. All individual reinforcements are displayed true to scale and the prestressed individual reinforcement is filled in additionally.

RTslab - Simple Building Construction Slab

Windows® programme with graphically interactive input, calculation, design and evaluation of plane, rectangular and polygonal slab systems. This application is simple to handle, has an integrated user's guide and contains in detail the following features:

• integrated learning wizzard with processing hints
• interfaces to ZEICON® and DXF for direct import of CAD data
• complete undo / redo functionality at system input
• object- and context-sensitive working environment
• clear toolbars for all essential programme functions
• simple 2D constructions for slab fields, walls, columns and box outs as well as point, line and area loads on grids, on axes and in dialogue
• integration of downstand beams for the illustration of more realistic stiffnesses
• 3D viewer for the visualisation of slab geometry and loads
• powerful FE solution with the calculation core of TRIMAS®
• element formulation according to the Reissner- Mindlin-Theory for arbitrarily thin and thick slabs
• consideration of an elastic bedding
• animation of deformations for a better control of input data for each load case
• definition of arbitrary section window for the graphics in the output list
• loading with automatic load case generation and reinforcement steel (As) superposition for each field
• import function for loads from previous slab applications
• bending design for reinforced concrete according to DIN 1045, DIN 1045-1, EN 1992-1 and according NAs for DE, AT, SK/CZ and UK 
• shear design for reinforced concrete according to DIN 1045, DIN 1045-1, EN 1992-1 and according NAs for DE, AT, SK/CZ and UK 
• punching verification according to DIN 1045, DIN 1045-1, EN 1992-1 and according NAs for DE, AT, SK/CZ and UK 
• automatic design of areas near walls and columns
• illustration of results via isolines with freely settable contour lines
• preview for position and load drawing
• result preview for deformations, bearing reactions and slab stress resultants as well as reinforcement steel (As) values
• selective output control with preconfiguration, document preview and outline
• automatic generation of the complete result list including diagrams and graphics
• list generator for RTPrint, RTF or HTML format
• Online supports and manual, introductory example

The slab system application can also be started as an integrated tool from the CAD programme ZEICON®. In this case, the design results from the internal data transfer are available and can be used directly for the reinforcement of the slab.

RTool - Collection of detail and member design Tools

Reinforced Concrete:

• morticed reinforced concrete beam with framework model according to Finger-loos/Stenzel
• box out design in reinforced concrete beams incl. reinforcement suggestion
• elastically bedded reinforced concrete beam with loss of bedding
• punching verifications incl. reinforcement suggestion for DEHA, HALFEN or Jordal dowel bars
• bracket design
• uniaxial reinforced concrete design incl. reinforcement suggestion
• proofs for vibration stress ranges and strains
• design according to DIN 1045, DIN 1045-1, EN 1992-1-1 and corresponding NADs for DE, AT, SK/CZ and UK

Steel Construction

• verification of lateral-torsional buckling for symmetric profiles according to DIN 18800
• design of continuous steel beams
• verification of steel stress

Timber Construction
All verifications in timber construction are performed in accordance with DIN e.g. EN. All relevant proofs are performed also for structural fire design. The load parameters for the roof design tools are shown in the integrated snow and wind load zone maps for Germany or the respective DIBt charts. 

• continuous timber beam
• continuous timber rafter
• one-storey timber column
• collar beam roof incl. verification for ridge and base points, collar beam connection and rafter support
• rafter roof incl. verification for ridge and base points as well as rafter supports
• purlin roof incl. verification for ridge and base points as well as rafter supports
• complete construction suggestion for the planning of all three roof types incl. detailed drawings of the ridge and base points as well as all collar beam connections
• spatial collar and ridge rafter
• bending rigidity of timber frame corner
• couple and rafter purlins
• continuous timber beam
  Brickwork
• verification of brickwork for DIN 1053 part I (refurbishment of masonry)

ZACview - General CAD tool under Windows® with the following functions:

• viewer for different CAD formats: HPGL, BGL, DXF, ZAC
• converting of these formats to DXF
• fast zoom and pan functions
• page facilities, optionally true to scale
• plot output via Windows®
• creation of drawings from the ZAC variants
• creation of steel and material lists
• processing of ZAC variants in OLE-compatible applications, such as e.g. MS Word, AutoCAD or TurboCAD
• visualisation of generated constructions and reinforcements from different static applications
• transfer of ZAC variants into different CAD systems via DXF-Export