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Templates

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Calculation templates

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AS/NZ

Europe

Beam Analysis Calculators

Beam Analysis using Macaulay's Theorem

Beam Analysis using Anastruct

2D Truss Analysis using OpenSeesPy

Column Buckling Calculator

Sample Project

Concrete Column P-M Diagram Calculator

Structural Engineering

Enhance your knowledge and stay up-to-date with the latest trends and innovations in structural engineering with our articles and resources. Visit now

Structural Engineering Calculators

Concrete Beam Designer to AS3600

Concrete Retaining Wall to AS4678

Concrete Shear Wall to AS3600

Concrete Wall to AS3600

Concrete Slabs to AS3600

Neutral Axis Calculator: RC Section to AS3600

Concrete Column Designer to AS3600

Concrete Slab-on-grade Designer to AS3600

Concrete Rectangular Footing Designer to AS3600

Concrete Punching Shear Calculator to AS3600

Reinforcement Development Length Calculator to AS3600

Steel Beam and Column Designer to AS4100

Fillet Weld Group Calculator to AS4100

Bolt Group Calculator to AS 4100

Steel Web Plate Connection to AS4100

Steel Moment End Plate Connection to AS4100

Steel Flexible End Plate Connection to AS4100

Timber Beam Calculator to AS1720.1

Timber Column Calculator to AS1720.1

Timber Joints to AS1720.1

Load Combinations to AS1170.0

Wind Load to AS/NZS 1170.2

Truss Analysis and Design

Check out CalcTree's library of structural engineering calculations to AS/NZ building and design codes here.

Structural engineering calculations to AS/NZ codes and standards

Timber Bolt Joint Designer to AS 1720.1

Timber Nailed Joint Designer to AS 1720.1

Timber Screwed Joint Designer to AS 1720.1

Here is a comprehensive and easy-to-follow pack of timber joint calculators to Australian Standards!

Check out our full library of CalcTree templates 

Here is a comprehensive and easy-to-follow pack of timber joint calculators to Australian Standards! 

Timber Joint Calculators to AS1720.1

The bolt group is analysed using the Instantaneous Centre of Rotation concept, then shear, tension and combined action is checked on each bolt.

Bolt Group Calculator to AS 4100 - CalcTree

This calculator checks a fillet weld group for in-plane loading. The weld group is analysed using the Instantaneous Centre of Rotation (ICR) concept.

Design standard steel sections with ease on CalcTree. Free-to-Use Steel Section Properties Calculator as per AS4100. Calculate now!

Standard Steel Section Properties Calculator - AS4100 

Standard Steel Section Designer to AS4100

 by the CalcTree engineering team on July 14, 2024

This calculator designs timber members in bending, like rafters and joists, by ensuring the beam meets flexural and shear requirements to Ultimate Limit State (ULS) methods. 

All calculations are performed in accordance with 

Timber Design: Australian Standards AS1720 and AS1684

 for further explanation about timber design for flexural members.

Summary_input

Summary_output

Calculate size of timber beam with precision using AS 1720.1 standards. Access the ultimate Free-to-use wood Beam Calculator on CalcTree. Try now

Wood Beam Calculator to AS 1720.1 

 by the CalcTree engineering team on July 8, 2024

This calculator designs timber members in compression, like columns and truss struts, by ensuring the member meets compression requirements to Ultimate Limit State (ULS) methods. 

Timber Design Standards - AS1720 and AS1684

 for further explanation about timber design for compression members.

Efficiently design timber columns to AS 1720.1 standards on CalcTree. free-to-use Timber Column Design Calculator. Calculate now

This calculator allows the user to design a rectangular concrete slab on soil, supporting walls and columns or vehicle load.

Concrete Slab-on-Grade Designer to AS3600

This calculator allows the user to design an isolated reinforced concrete footing supporting a single load-carrying column.

Rectangular Footing Designer to AS3600

Design RC columns per AS 3600 effortlessly with our Free-to-Use Concrete Column Design Calculator.  Try the RC Column Designer today!

Concrete Column Design Calculator - CalcTree

Concrete Column Design Calculator to AS 3600

 by the CalcTree engineering team on August 5, 2024

This calculator is used to determine the depth to the neutral axis of an RC section in 3 different stages of concrete cracking: 

All calculations are performed in accordance with

matplotImage

The neutral axis (N.A) is an axis in the cross-section of a beam where there are no 

. In a symmetrical cross-section the neutral axis is at the centroidal depth. How to calculate the depth of the neutral axis and how the neutral axis affects a member's performance is important to understand when designing RC sections.

To visualize the neutral axis in structural engineering applications, picture a beam with an external load applied to it. When a beam is loaded, internal forces develop within it to maintain equilibrium. The internal forces in a beam have two components: 

There’s an area in the middle of the beam’s cross-section that is neither stretched nor squashed; this is known as the 

. At this point within the beam's cross-section, internal stresses are 

from top of the section to bottom and passes through zero at the neutral axis. At this point, compressive and tensile stresses are in equilibrium, that is, no internal stresses exist.

Why is it Important to Determine the Neutral Axis?

The concept of the neutral axis is fundamental when understanding and determining the flexural bending stresses and deflection of reinforced concrete beams. The neutral axis, 

 is an input parameter to the beam's ultimate flexural capacity, 

 and the second moment of inertia equation, 

The neutral axis shows how much of the cross-section is in tension or compression. The further the neutral axis is from the extreme tensile fibre, the larger the area under tension and therefore the more tensile cracks there can be. Cracks begin propagating when the tensile stress reach the characteristic flexural tensile strength of the concrete. Concrete is inherently weaker in tension than compression, so steel reinforcements are used to increase the tensile strength of concrete. Steel is ductile and possesses great tensile and compressive strength; therefore, they are combined with concrete to provide extra structural strength.

The location of the neutral axis depends on the 

of the RC section. The neutral axis can be found using equilibrium of internal forces: 

 are the sums of compression and tension forces, respectively.

Three different stages can be defined for the determination of the neutral axis, as provided below.

👉To simplify the calculation, we "transform" our section into an equivalent homogenous section, that is, a section with one material (concrete) rather then two materials (concrete and steel). The 

 is the modular ratio, transforms the steel areas into equivalent concrete areas. 

When the concrete is uncracked, the location of the neutral axis is the centre of the geometric centre of the transformed section. At this stage, the concrete section below the neutral axis demonstrates some tensile capacity.

Rearranging the above, the depth of the neutral axis, 

The section is cracked, but its behaviour is linear-elastic therefore the transformed area and force equilibrium method can be used.

At this stage, the concrete section below the neutral axis does not contribute to tensile capacity. Hence:

The force equilibrium can be presented as a quadratic equation with respect to the depth of the neutral axis 

The section is cracked and has reached its ultimate strength capacity, therefore the stress distribution is non-linear. At this stage, rectangular stress block and force equilibrium method can be used. 

At this stage, the concrete section below the neutral axis also does not contribute to tensile capacity. Hence:

Efficiently determine the neutral axis for RC sections on CalcTree. Free-to-use Neutral Axis Calculator. Try it now!

Kenny Kim

Neutral Axis Calculator - RC Section

The development length is the minimum length of a reinforcing bar over which the stress in the bar can increase from zero to the yield strength

This calculator computes the shear capacity of a suspended flat slab at a concentrated load. This situation is often referred to as 'Punching Shear'. 

This calculator designs a concrete braced wall. It checks axial, shear and slenderness using the simplified method of Section 11 in AS3600:2018.

Concrete Wall to AS3600:2018 Section 11 Simplified Method

Click below for a complete guide to slab analysis and design following the Australian Standards.

Design Guide: Concrete Slabs to AS3600

The design guide is accompanied by three calculators, that perform the analysis and design of reinforced concrete slabs, either one-way or two-way spanning, or flat slabs. 

Concrete One-way Slab Calculator to AS3600

Concrete Two-way Slab Calculator to AS3600

Concrete Flat Slab Calculator to AS3600

Pack of concrete slab analysis and design to Australian Standards, with a complete design guide and three calculators: one-way, two-way or flat slab

This calculator designs a web plate connection and checks bolt shear, web plate capacity, weld shear and bending, and beam shear for compliance.

Steel Web Plate Connection Design Calculator

Design RC shear walls using CalcTree's online design tool.

Concrete Shear Walls to AS3600 Designer using Python

Calculate concrete retaining walls to AS4678 standards. Optimise design for safety and compliance with our easy-to-use tool, ideal for engineers.

Concrete Retaining Wall Design and Calculation tool to AS4678

This calculator designs a bolted moment end plate to column connection, performing the required checks on the end plate, welds and bolts.

Steel Moment End Plate Connection to AS4100 and ASI Design Guide 12

This calculator designs a flexible end plate connection, following the Australian Steel Institute (ASI) Design Guide 4.

Steel Flexible End Plate Connection to AS4100 and ASI Design Guide 4

Load Table (1)

ψ Factors (1)

1.2G+Su+ψcQ

Output (2)

1.2G+Su+ψcQ (1)

This calculator evaluates the load combinations to AS1170.0 for ultimate and serviceability limit states.

Load Combinations Calculator to AS1170.0

We know the wind calculation can get really complicated really quickly. Our pack of calculators will guide you through the calculation of the different components that go into the wind calculation in accordance with AS/NZS 1170.2. 

As per Clause 2.4, the design wind pressure 

 takes a different value for each of the wall surfaces (windward, leeward, side) and roof surfaces (upwind, downwind, crosswind), for each wind direction under consideration, there will be many different 

 values corresponding to each surface. For each surface and wind direction, we need to calculate all combinations to see what gives us the worst-case net pressure. 

Design Wind Speed to AS/NZS 1170.2

Our pack of calculators will guide you through the different components that go into the wind calculation in accordance with AS/NZS 1170.2

Timber Strut Designer to AS1720.1

Let's determine the member force and capacity of a strut in a timber truss.

👉Note, red (negative) = compression, blue (positive) = tension

This calculator does the analysis of a 2D planar truss using python library OpenSeesPy, and performs the design of a timber strut using AS1720.1

Truss Analysis and Design OpenSeesPy & AS1720.1

Free-to-Use RC Beam Design Calculator to AS3600 Standards. Streamline your engineering projects. Get started now for precise calculations!

AS/NZ

Concrete

Steel

Timber

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