1. Cost Estimate - Masonry Wall (70 marks) You are a key member of the Estimating team for a building project in South East Queensland. a) Using the following information (and other information, as necessary) calculate from first principles the Unit Rates (without mark-up for profit and overheads) for the following BOQ Items: MASONRY HOLLOW CONCRETE BLOCK BUILT IN STRETCHER BOND IN CEMENT, LIME MORTAR (1:1:6 CEMENT: LIME:SAND) FINISHED WITH 19 MM DIA ROD TO FORM CONCAVED IRON JOINT PROFILE 1 190 mm Wall faced and pointed on both faces (Wall up to 3m) m2 205 2 190 mm Wall faced and pointed on both faces (Wall over 3m and up to 4m) m2 59 CONCRETE FILLING 20 MPa Vibrated reinforced concrete having 1:2:3 ratio (Cement:Lime:Aggregate), 10 mm Aggregate and 230 mm slump 3 Filling to all cores of 190 mm block wall m2 264 Materials delivered to site: Standard Blocks 20.01: Sand: Cement: Lime: 20 MPa Corefill Concrete: Productivities: 2 x bricklayers + 1 x labourer: (working as a team) Unit Rates: Blocklayer: Labourer: Concrete mixer: Grout pump & hoses: $2,300 per 1,000 $80 per m $8.00 per 40kg bag $6.00 per 20kg bag $145 per m - lay on average 400 blocks/day -corefill on average 1.0 m/hour $45 per hour $35 per hour Dry hire $50 per day Dry hire $600 per day 2. Preliminary Cost Items (30 marks) You are a key member of the Estimating team for a building project in South East Queensland. The Programmer has advised you that the original program duration for this project is forty five (45) weeks and that the original anticipated duration for time on site will be forty two (42) weeks. Contract award is anticipated to be in August. a) Using the following information (and other information, as necessary) calculate the Weekly Rates and the Total Costs (without mark-up for profit and overheads) to be included in the Estimate of Costs for the following Preliminary Costs Items: i. Project Manager ii. Site Manager The Annual salaries for the project staff are as follows: Project Manager: Site Manager: Show all your calculations. $180,000 $150,000 b) Provide a detailed explanation of your calculations and any assumptions that you have made. Show all your calculations (preferably in a spreadsheet format). b) Provide a detailed explanation of your calculations and any assumptions that you have made. c) Discuss (300 to 400 words) the risks and uncertainties involved in your calculations and how you might be able to provide a more accurate estimate of costs.