For the 27 Scott Street project, the client requested that the façade posts be installed with sufficient clearance so that the fixing anchors do not clash with the PT cable lines.
We carefully followed the client’s requirements and coordinated the design to ensure that the anchors clear the PT cable lines. The steel was successfully erected without any issues.
We would like to thank the client for giving us the opportunity to be part of this project.
Based on this scenario, what would you propose as an alternative to balance structural performance and fabrication efficiency? Share your thoughts in the comments!
Shear connections play a crucial role in structural steelwork, ensuring the stability and strength of a framework. One common method is the extended shear plate connection, as seen in the R1 to J1 connection detail. However, this method introduces bolt eccentricity, which could impact the overall efficiency of the joint.
In the given design, the PFC (Parallel Flange Channel) shear connection is detailed using an extended shear plate. While this is a standard approach, it inherently results in increased eccentricity due to the offset load transfer through the bolts. This can lead to additional bending moments in the connection, requiring careful consideration in the design phase.
A potential improvement is to introduce a cope in the PFC section and utilize a simple shear connection instead. This modification would:
However, this approach was not accepted by the client due to fabrication ease considerations.
This case highlights a key engineering principle: design optimization vs. fabrication practicality. While structural efficiency is paramount, practical considerations such as ease of fabrication, cost, and site constraints often dictate final design choices.
Author: RAJ (Arokiaraj Arputharaj), an expert in simplified structures for residential projects, also specializes in structural steel drafting.
Simple to fabricate and easy to install, is the mantra when it comes to structural steel for residential.
Residential projects run on a budget. When they do, cost saving detials are usually missed by the engineer and architect.
At Tek1, we see, check and recommend cost saving alternatives. 90% of the time our proposals are accepted saving cost to fabricator and builder.
Our simple philosophy is , if it complicated to detail, it will be more expensive for fabricator. Keep it simple.
If you would like me to assist with your project, please send an email to koshy@tek1.com.au with your project specifications. Kindly use ‘Raj’ as the subject header.
Overview
This guide provides instructions for designing and detailing commercial stairs per the Australian Standards AS1428.1 and ABCB Housing Provisions Standard 2022. These standards ensure safe and accessible stairways in commercial buildings, with specific provisions related to the National Construction Code (NCC) and the Disability (Access to Premises-Buildings) Standards.
By following these steps, builders and architects can ensure that commercial stairs meet the safety and accessibility requirements established in AS1428.1 and the ABCB Housing Provisions Standard 2022.
