Assignment 2 building estimating and tendering PDF

Preview

Summary

Assignment 2 building estimating and tendering...

Description

Assignment 2 Building Estimating and Tendering: 301207 Student ID: 20033949

1

Building Estimating and Tendering: 301207

Student ID: 20033949

Introduction This report provides details on a proposed housing project that is at the tender stage of construction. The report aims to provide insight into the processes utilised by the estimator and outcomes seen through the pricing of preliminaries for this given project. Section A implements pricing of the eight preliminaries providing the cost of one subtopic from each preliminary, this is seen through the pricing of fencing under temporary works. In addition to pricing preliminaries Section A produces a bill of quantities presenting an accurate cost estimation of the project and subtotals. Section B details the software utilised by the estimator and their team to produce an accurate estimating cost. Effectively explaining the process CostX and Cubit provides as well as the benefits produces by the editing software. Section A The contract total was generated from the area of the project multiplied by the cost provided by the cost index. The area of the house was given by the building plans provided while the cost index, appendix 1, labelled the house as a residential: medium standard individual house. Area: 95 metres squared x cost index price: $1,670 per metre squared Therefore, the overall contract total = $158,650 Project duration was then calculated in the cost index, appendix 2; it states in the cost index if the contract total is less than $200,000 then the average build time is between 17-22 weeks. For this given development the build duration was estimated at 22 weeks this was due to issues like COVID-19 slowing down production on-site. Employment Requirements The subtotal that has been estimated under employment requirements is furniture. Furniture is defined as movable objects//accessories that are used to increase the functionality and liveable conditions within an area. Chapter 15 of Estimating and Tendering of Construction work, appendix 3, states that if furniture is not stated it is assumed that the client is providing their own furniture. Which means the cost of this subtotal is N/A as the cost is provided by the client. Management and Staff The subtotal that has been estimated under management and staff is a planning engineer. A planning engineer’s responsibility is to control the construction process whilst mobilising, updating structural designs/processes and provide short-term programs. Cordell’s cost guide, appendix 4, articulates that the hourly rate of a civil/structural engineer is $115.61. Cordell’s cost guide, appendix 5, also documents that a bonus is paid, $328.88, at the completion of a job. It has been estimated that the engineer will complete two jobs in the form of footing inspections and slab inspections. $115.61 x 32hours = $3,699.52

2

Building Estimating and Tendering: 301207

Student ID: 20033949

$328.88 x 2 jobs = $657.76 Therefore, the planning engineer is paid a total of $3,699.52 + $657.76 = $4,357.28 Facilities and Services The subtotal that has been estimated under facilities and services is waste skips. A waste skip is a large container designed to contain waste materials. The purpose of a waste skip is to collect the build-up of off-cuts and demolition waste in one place so the mess can easily be removed. The estimator has calculated that a heavy waste skip is to be utilised for the first three week of construction to remove any demolition debris. A second skip is then used for the last week of construction to remove any additional off-cuts or general waste to clear the project of waste before being presented. (heavy-waste skip, Cobra pricing apx.6) $759 x 3 weeks = $2,277 (standard skip, Cobra pricing apx.7) $594 x 1 week = $594 Therefore, the total cost of waste skips is $2,277 + $594 = $2,871 Mechanical Plant The subtotal that has been estimated under mechanical plant is a mixer. The purpose of a mixer is to create concrete by mixing cement, aggregate and water. A concrete mixer is defined as a large drum that spins in one direction with an inner has large propeller spinning in the opposite direction. By having the drum and propeller spinning in opposite directions the concrete mix is created at a consistent and fast pace which in necessary on a construction site. The estimator has calculated that a petrol mixer is to be utilised onsite for five weeks to help create the brick facade of the project as well as any additional walls. Petrol mixer costs $63.64 per day to rent, Cordell’s cost guide appendix 8. $63.64 x 7 days = $445.48 (cost to rent for a week) $445.48 x 5 weeks Therefore, the total cost for a renting the mixer is = $2,227.40

3

Building Estimating and Tendering: 301207

Student ID: 20033949

Temporary Works The subtotal that has been estimated under temporary works is fencing. The purpose of fencing a construction site is to comply with building code, injury prevention and theft prevention. Injuries on site can be a major issue for contacting companies because the company can be sued. If the general public is injured trespassing on site or hit by debris from the construction site and there is no fence in place the injured party can sue as the company has not maintained their safety regulations. Theft is also a common issue on-site so by placing a two-metre-high fence that is padlocked or locked in the way, most of the general public will naturally stay away. The cost to rent the fence has be calculated by multiplying the cost to rent the fence per metre, Cordell’s cost guide, appendix 9, by the perimeter of the given project. (Fence per metre) $11.36 x 190m (the perimeter) Therefore, the total cost to rent the fencing is = $2158.40 Site Accommodation The subtotal that has been estimated under site accommodation is toilets. Within construction portable toilets are a necessity yet what most people don’t know is that there are four different types of portable toilet. It is very important to distinguish between the different types of portable toilets so that the most useful and appropriate option is selected. The four different types of portable toilet are sewer connected toilets, chemical toilets, disables toilets and trailer toilets. Sewer connected toilets are very efficient as they don’t need to be cleaned as they are directly connected to the sewer helping save money. The disadvantages to sewer toilets are that not all projects can connect a toilet to the sewer on the site and they cannot be moved once connected, causing this type of site accommodation only to be used on larger sites. Chemical toilets are a slightly more portable option to sewer connected toilets as they are not connected to anything so can be moved around the site. Chemical toilets rely on a chemical compound to breakdown the waste making it easy to remove. The negative to chemical toilets is that they need to be serviced/cleaned every fortnight incurring additional cost. Disabled toilets are larger sized toilets designed for the use of disabled people. Disabled toilets are a larger toilet providing luxury, it is unlikely to be used as there won’t be disabled people requiring this type of facility working on a construction site. Trailer toilets are trailers connected to the back of a trailer, these types of trailers are small and compact. Trailer toilets are most commonly utilised on sites with access issues or is just a really small site. The estimator has decided to implement sewer connected toilets due to its functionality, efficiency and cost saved on low maintenance. The cost to rent a sewer connected toilet, was calculated by multiplying rent cost, Cordell’s cost guide, appendix 10, by weeks utilised. (Toilet rent per week) $72.73 x 22 weeks Therefore, the cost to rent a sewer connected toilet is $1,600.06 Contract Conditions The subtotal that has been estimated under contract conditions is insurances. Insurance is a rate obtained to provide financial coverage in case of accidental risk leading to injury or damage. Insurance within the industry is split between contract work insurance and liability 4

Building Estimating and Tendering: 301207

Student ID: 20033949

insurance providing two difference costs. Contract work insurance is the premium protecting the client from financial loss through a base rate providing optimal risk management. Insurance liability however is an additional cost on top of the premium that helps prevent the client from facing lawsuits and similar claims that may be imposed. Insurance cost is calculated by working out the contract work insurance through the use of Rawlinsons’ cost guide, appendix 11, and adding the cost of liability insurance that also utilised the Rawlinsons’ cost guide, appendix 12. Contract work insurance $158,650 x 0.15% (rate) = $237.98 $237.98 x 37% (FSL) = $88.05 $237.98 + $88.05 = $326.03 Liability insurance $326.03 x 9% (stamp duty) = $29.34 $326.03 + $29.34 = $355.37 $355.37 x 10% (GST) = $35.54 $355.37 + $35.54 = $390.91 Therefore, the overall cost of insurance is $326.03 + $390.91 = $716.94 Non-mechanical Plant The subtotal that has been estimated under non-mechanical plant is small tools and equipment. Small tools and equipment are defined by the construction industry as small one man operated tools for example power drills, shovels, power saws. Small tools and equipment are calculated from a percentage of the overall contract cost. The estimator has deemed that one percent of the total contract cost is to be allocated to small tools and equipment.

5

Building Estimating and Tendering: 301207 Small tools and equipment (contract cost) $158,650 x 1%) Therefore, the overall cost of small tools and equipment is $1,586.50

Part B 6

Student ID: 20033949

Building Estimating and Tendering: 301207

Student ID: 20033949

Construction cost estimating software is a design utilised by contractors to estimate cost onsite through computer software. The job of a cost estimator is mainly to identify the price of a project that is achieved through estimating software. Subsequently, the estimated cost will become a part of the contract. The two main types of estimating software used in the construction industry are CostX and Cubit. Estimating software provides a more efficient method to find construction cost avoiding cost and time wastage on-site. CostX is an estimating software that measures construction cost providing ease through software automation. Automation can be seen through 2D and 3D drawings providing project scale and cost through measurement. An example of this can be seen through revising the estimated cost of a project due to a design change, Sam McEvoy, 2018. This would cause a redesign in the original drawings resulting in the project having to be remeasured. This would usually take weeks or possibly months yet when using CostX time is reduced by 80%, Sam McEvoy, 2018. This is a direct result from CostX having the ability to compare the original and new designs identifying the change necessary. When it comes to updating the measurement, it is a simple as removing the original measurement from CostX and replacing it with the new measurement that is approved in the system the new value should be updated. Formats that can be created within CostX include estimates, cost plans, bills of quantities and quotes. CostX is compatible with CAD drawings, PDFs, BIM files and much more providing one specific place where all platforms of design and estimation can be calculated, iTWO costX, 2021. The benefits of utilising CostX are improved efficiency, reduced cost and time wastage. Cubit is a standard software estimating and take-off, it is the only software with an industry that allows a person to use take-off software and estimate software at the same time. The layout of Cubit can be seen in one view providing ease to the customer. Cubit is also three times faster than other software programs due to its ability to provide estimating and take-off quantities in the same platform. Causing Cubit to be faster and more efficient than other software formats, Building Software Services, 2021. By providing take-off and estimation with the same software an increased level of accuracy and control is experienced throughout the project’s duration. Estimating methods provided by Cubit creates flexibility and functionality that is adaptable to the customers desires and needs, Building Software Services, 2021. An additional aspect of Cubit software is tracing allowing the customer to change the complexity of quantity take-offs. Tasks are performed quickly and with maximum efficiency by tracing directly over plans. Advantages include time saving, the software is user-friendly, provides pinpoint accuracy and integrated take-off software, Building Software Services, 2021. Conclusion This organisation has provided a competitively priced preliminaries bill that provides quality for cost in an attempt to secure the proposed housing project. This report provides a bill of quantities with an explanation behind the pricing of preliminaries as well as the programs utilised in the process of estimating. Section A implements the pricing of the eight preliminaries providing the cost of one subtopic from each preliminary expressing intent and sound reasoning saving finances whilst still providing quality. Section B gives detailed outlook to the processes used through the editing software CostX and Cubit providing improved efficiency, reduced cost and time wastage. Bibliography 7

Building Estimating and Tendering: 301207

Student ID: 20033949

1. Alex, Hamilton, 2018, REALas, 5 Reasons you need temporary fencing when building - REALas. Accessed 22 September 2021. https://news.realas.com/5-reasonstemporary-fencing-building/. 2. Australian Government, 2021, Building Cost Index. 3. Building Software Services, 2021, Cubit Estimating Standard - Takeoff, Bill of Quantities Software for Construction. Accessed 22 September 2021. https://www.bsssoftware.co.uk/cubit-estimating-standard/. 4. Cobra Waste Solutions, 2021, Skip Bin Hire Sydney - Waste Removal | Cobra Waste Solutions. Accessed 22 September 2021. https://www.cobrawaste.com.au/? gclid=CjwKCAjw49qKBhAoEiwAHQVTo2EFsBDWdKFKEDAx6SibUh37ChdcgIKeoIYkzNrhRvFI7bEof8r6RoCeUYQAvD_BwE. 5. Cordell Building Publications, 1971, Building cost guide: New South Wales. 6. Dinkum Dunnies, 2017, Choosing Portable Toilets: Which Type is Right for You? Accessed 22 September 2021. https://www.dinkumdunnies.com.au/news/choosingportable-toilets-which-type-is-right-for-you. 7. iTWO costX, 2021, iTWO costX Takeoff & Estimating Software by RIB. Accessed 22 September 2021. https://www.itwocostx.com/#. 8. Martin, Brook, 1993, Estimating and Tendering for Construction Work, chapter 15. 9. Rawlsons, 1993, Rawlinsons construction cost guide for housing 10. Sam McEvoy, 2018, The Capabilities of CostX: The Benefits of New Software | Faithful+Gould | UK & Europe. Accessed 22 September 2021. https://www.fgould.com/uk-europe/articles/the-capabilities-of-costx-the-benefits-ofnew-s/.

Appendix 8

Building Estimating and Tendering: 301207

Student ID: 20033949

1. References cost index (Australian Government, 2021)

2. Reference cost index (Australian Government, 2021)

3. Estimating and Tendering for Construction Work, chapter 15 (Martin, Brook, 1993)

4. Cordwell’s cost guide (Cordell Building Publications, 2021)

9

Building Estimating and Tendering: 301207

5. Cordwell’s cost guide (Cordell Building Publications, 2021)

6. Cobra pricing (Cobra Waste Solutions, 2021)

7. Cobra pricing (Cobra Waste Solutions, 2021)

8. Cordwell’s cost guide (Cordell Building Publications, 2021)

10

Student ID: 20033949

Building Estimating and Tendering: 301207

9. Cordwell’s cost guide (Cordell Building Publications, 2021)

10. Cordwell’s cost guide (Cordell Building Publications, 2021)

11. Rawlinsons’ cost guide (Rawlsons, 2021)

11

Student ID: 20033949

Building Estimating and Tendering: 301207 12. Rawlinsons’ cost guide (Rawlsons, 2021)

12

Student ID: 20033949...