The Design Tool for Civil Engineering projects an

The Design Tool for Civil Engineering projects – an overview Phil Birch & Susan Steensma Cyril Sweett 22 -09 -10

Aim of training session n Discuss the background to the ‘Designing out Waste’ (Do. W) process; n Explain the role of the tool in helping Do. W; n Demonstrate how to use the Do. W Tool for Civil Engineering projects (Do. WT-CE).

Agenda n n n n Introduction What is ‘Designing out Waste (Do. W)? ’ Summary of the tool Example inputs and outputs User guidance Design guidance for Civil Engineering projects The tool in use Q+A

What do you want to achieve today?

What is ‘Designing out Waste’ and why is it important?

Background

Objectives n Benefits of designing out waste n Principles of designing out waste n Designing out waste process n Design guidance and tools

Why take action? n Materials resource efficiency n Landfill tax n Site waste management plans n Environmental assessment n Client benefits

Waste Hierarchy

The role of Designing out Waste in the overall design and construction process

Supply chain interfaces Tendering & appointment Model wording Outline design Prevent waste Designing out waste tools/guidance Detailed design Forecast waste Reduce waste Increase RC Net Waste Tool Construction Waste reduction Waste recovery Measure performance Post-construction Review performance Benchmarking SWMP Tracker Reporting Portal SWMP Template Pre-construction

The principles of ‘Designing out Waste’

Principles of Designing out Waste Design for: 1. Reuse and recovery 2. Off site construction 3. Material optimisation 4. Waste efficient procurement 5. Deconstruction & flexibility

Design guidance for civil engineering projects § The design solutions provided within the tool are in-line with the recommendations in the Design guide § Use the guide to evaluate options

The Designing out Waste Tool for Civil Engineering projects (Do. WT-CE)

Do. WT-CE Users: Design team – Civil engineer § When: § Option preparation and design development stages Inputs: § Project elements and approximate dimensions § Design team thinking on options to design out waste Outputs: §Tabulated reports on the impact of design solutions on project costs, materials requirement, wastage and embodied carbon Cost: § A short amount of time is needed to complete the analysis (depending on the project complexity) § The tool is free to use Benefits: § Helps to identify opportunities to reduce the need for imported materials, minimise wastage and achieve cost savings § Can be used for options appraisal by comparing different projects scenarios § Provides input for the project’s SWMP § Users can include potential savings in tender specification so that tender prices can take account of design decisions § Results can be used to demonstrate responsibility

Designing out waste process Design tool Produce an indicative waste forecast Design review workshop Decide on actions to reduce waste through design Design tool Enter actions and calculate impacts SWMP Record indicative waste forecast and waste prevention actions

Example – Headline results The engineer used the Do. WT-CE to: • Identify opportunities to Design out Waste • understand the cost of waste • set actions to reduce waste arisings • increase the recovery of waste

Explanation of data hierarchy Element – A fundamental aspect of civil engineering i. e. earthworks/drainage/etc Sub Element – An aspect of an element i. e. a type of drainage option Component – Sub elements comprise of a number of components. For example drainage options would consist of pipe, bedding, top soil etc (all of which are components)

Do. WT-CE – hands on

User guidance Brochure Dataset Quick start guide User guide

User process 1) 2) 3) 4) 5) Build project Produce baseline results Investigate opportunities for Do. W Assess impact Record actions

Designing out waste process Design tool Produce an indicative waste forecast Design review workshop Decide on actions to reduce waste through design Design tool Enter actions and calculate impacts SWMP Record indicative waste forecast and waste prevention actions

Access the tool at: http: //dowtce. wrap. org. uk/

Title page

Registration

‘My projects’

‘Project details’

User journey – Project builder 4 5 1 3 2

Designing out waste process Design tool Produce an indicative waste forecast Design review workshop Decide on actions to reduce waste through design Design tool Enter actions and calculate impacts SWMP Record indicative waste forecast and waste prevention actions

Design guidance for civil engineering projects § The design solutions provided within the tool are in-line with the recommendations in the Design guide § Use the guide to evaluate options

Designing out waste process Design tool Produce an indicative waste forecast Design review workshop Decide on actions to reduce waste through design Design tool Enter actions and calculate impacts SWMP Record indicative waste forecast and waste prevention actions

User journey – Solutions and impacts 5 6 4 1 2 3 7 8

Reporting

Designing out waste process Design tool Produce an indicative waste forecast Design review workshop Decide on actions to reduce waste through design Design tool Enter actions and calculate impacts SWMP Record indicative waste forecast and waste prevention actions

Sketches of examples Highways 300 500 H=4 Embankment + nailing Filter drain 2 Footpath 10 Highway H=4 Cutting + wall H=1. 5 10 x gulleys Footpath 2 Emb wall 100 Embankment stabilised Filter drain 400 H=1. 5 Cutting + wall 300 1, 000 H=4

Sketches of examples Streetworks 200 3 Footpath 6 Road Footpath 10 Square 30 170 3

Sketches of examples Railways Cutting 1: 2 Pre Cast Concrete retaining wall Traditional front wall platform Track on concrete sleepers Filter drain Traditional front wall platform Cutting 1: 3 Structural steel bridge Filter drain RC foundation

Q&A