sazeh features

This page lists the current features of sazeh by category. The known limitations of each part are on the limitations page.

The status of each row

Every check row takes one of the five statuses below. The difference between them matters, because a tool that counts everything undecided as "met" delivers a sheet that is green but misleading.

Status	Meaning
Met	The check was done and the clause is met or the member is adequate.
Not met	The check was done and the clause is not met or the member is not adequate.
Deferred	The tool cannot decide this item at present, and the reason is written; for example, the design of a shear wall.
Not designed	The member has not been designed. This status is never counted as "met", and the design-coverage section of the sheet states the number of these members separately.
Information	A number, not a verdict; for example the coefficient C, for which there is nothing to compare with.

Model import

Upload of the .e2k file exported from ETABS, without a need to install ETABS. The file is checked before analysis: units, materials and loads. Materials whose values are impossible are rejected before analysis, and whatever was not read from the file is listed in the import report.
The direction of the earthquake load. If the file does not specify the direction of a load pattern, the direction is determined separately, and a guessed case appears in the report with the label "assumed".
The pier label of a wall is read from the file so that the wall forces can be attached to it.
The penthouse is declared by the engineer; sazeh does not guess it.

Loading and earthquake

The design base acceleration A and the soil type. You choose one of the four values of A (0.20, 0.25, 0.30 and 0.35, for low to very high hazard) and the soil type I to IV. The source of A is printed in the sheet.
The equivalent static load of the seismic code, with the tabulated soil coefficients, the importance factor and the Ru and Cd of table 3-4.
The load combinations of the loading code, and the 100% and 30% combination for the simultaneous effect of the two earthquake directions.
A check of the mass source against the live-load share of table 3-1. A mass source that counts only dead load underestimates the base shear of the building.
Accidental torsion with the 5% eccentricity of clause 3-3-7.
The vertical component of the earthquake (clause 3-3-9) for the members to which it applies.
Irregularities in plan and in elevation, including torsion, soft storey and weak storey.

Concrete checks

Check	Description
Beam flexure	Required reinforcement and reinforcement ratio.
Column axial-flexure interaction	Includes biaxial interaction.
Column and beam shear	With the effect of axial force.
Stirrup spacing in the critical zone	Based on the ductility requirements, not only on shear.
Torsion	Passing the torsion threshold is designed for.
Strong column, weak beam	The ratio at every joint.
Slender column	Second-order moment amplification.
Shear wall	In-plane shear, flexure and reinforcement ratio, and the boundary element.

Steel checks

Check	Description
IPE beam	Compactness, flexure and shear.
Box column	Compression buckling and interaction of axial force and moment about two axes.
Local buckling of the box wall	Reduced nominal moment for a non-compact wall.
Shear and torsion	For beams and columns.
Second-order effect	Amplification factor of the member and of the storey.

A composite frame (steel beams and concrete columns) is also checked, and each member is checked against the rules of its own material, but the row of the structural system stays "not met", because table 3-4 has no line for a composite frame.

Whole-building checks

Drift at the diaphragm corner, with the name of the joint and the governing combination.
Overturning according to clause 3-3-8.
Two bases of cracked stiffness. The sheet reports whether the drift verdict would change if the other basis had been chosen.
The structural system and materials against the lines of table 3-4.
The 25% share of the frame in a dual wall-frame system.

The calculation sheet

The sheet is delivered as printable A4 pages. At present it is written in Persian.

The result comes first. The sheet starts with the answer, and the count is in members, joints or storeys, not in rows.
Design coverage. The number of members that were actually designed and the reason the others were not.
Support reactions for every joint, with the combination that governs the largest downward load and the one that governs uplift, for the foundation designer.
The pier forces of walls beside the wall row.
Quantities in kilograms and cubic metres, by steel frame, concrete frame, slab and wall in every storey. The longitudinal reinforcement beside it is printed with the label "incomplete".
Assumptions that change the answer, in engineering language: the method of analysis, the stiffness basis, the application of accidental torsion and of the vertical component.
The closing section turns all corrections into actions that are named after ETABS windows.

The corrected model

Every section group is reported separately: the section before and after, the number of members, the change in weight, the change in concrete volume and the change in reinforcement. If columns became larger and beams smaller, this trade is not hidden behind one total.
The percentage change in weight is reported with two denominators: the frame weight and the weight of the whole structure.
The reported reinforcement is a lower bound and not a bar schedule, so it is always printed with the label "incomplete".
The corrected model is checked again with the same codes, and a clause that a change of section cannot fix is listed together with what would close it.
The engineer may declare that compatibility torsion is taken into account in beams. This declaration applies only to the corrected model; the original model stays as uploaded.

Alternative designs

From one grid, a reinforced-concrete, a steel and a composite moment frame can be built, and their weight, concrete volume and reinforcement compared. The choice among the designs is the engineer's.

The plan drawing

A plan view of the beam layout and the columns is shown on the result page.

Upload your ETABS .e2k model and get the calculation sheet.

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