CHAPTER 5 ESTIMATING WORK ITEMS COSTS, IDIRECT COSTS, MARKUP AND CONTRACT PRICING ... excavation equipment is able to operate continuously and not have to waste time waiting ... Loading time = truck capacity / production rate of loader (5.3) Truck capacity (bank measure) = truck capacity (loose) / (1+swelling factor) (5.4) ...

Keywords: Quartzite, Specific Energy, Field Production Rate, Rippability Classification 1.0 Introduction Due to its mode of excavation, ripping is suitable for shallow excavation (surface stripping) of a large area, particularly in obtaining a required finished level (e.g. preparation of project site and road alignment).

Suitability of Brisbane Rock Conditions to Roadheader Excavation Jody Herley 4 model which gave very similar predicted cutting rates for all three rocks.

NOTE: The table is under review. The author is revising the production rates based on his newly participated actual projects. Some figures can be seen at other sections under this "Productivity" and Marina Barrage progress photo section.

Read general excavation prices, tips and get free excavation estimates. CostOwl.com ... Home > Home Improvement > Other Projects > Cost of Excavation. How Much Does Excavation Cost? Excavation Prices. ... It may be difficult to find someone willing to work on an hourly rate. Many companies will want to quote you for an entire project, so, if ...

 · Hand Excavation Productivity Our guys are going to be getting their hands dirty real soon (hopefully) ... we may be getting a job for Con Ed at a substation in Staten Island. ... my production rate would drop. If you do do it by hand, you better put an ad in the paper for a steady stream of employees, because you will have a hard time getting ...

Excavation rates in rock vary with the size of job, hardness of rock and other local conditions. Often there is a local market price for blasting. Estimates of blasting production can be made by knowing the size of equipment and the type of job.

construction, the hard rock mining industry has always shown a major interest in the use of TBMs for mine development, primarily for development of entries, as well as ventilation, haulage and production drifts. ... production rates and costs for mechanized excavation systems increases the economic

survey of productivity rates used for highway construction by s michael a. harber.., ', a report presented to the graduate committee of the department of civil engineering in

Excavation Cost Definition. Use our excavation cost calculator to instantly calculator how much an excavation job will cost. Enter the length, width, and depth of the area that needs to be excavated and the cost per yard and our calculator will return the total cost of excavation.

Conditions: Rock Excavation around moderate traffic. Calculation: 2000 C.Y. x .65 x .88 = 1144 C.Y. per day Example Production Rate Calculation for Roadway Excavation: ... Production rates are based on the average of rates from five other nearby states with estimates. Landscaping rates are typically controlled by the planting season.

cutters in contact with the rock, as well as the excessively higher bit costs and low production rates that are encountered in excavation of hard and/or abrasive rock formations. However, roadheaders are commonly used in soft to moderately hard and non to moderately abrasive

Caterpillar Performance Handbook ... includes both production and costs. Factors bearing directly on productivity include such things as ... Manufacturer's Institute), CIMA(Construction Industry Manufacturers Association), or any other furnished manual related to rules for safe

Making production rates can be achieved in many cases by adding more scrapers and trucks… they will pay for themselves. If you start adding dozers, loaders or other support equipment; then you need to do a cost analysis to determine the feasibility.

If the operator has to re-position the breaker towards the edge of the rock and gradually downsize the material, production rate slows down. To assess which breaker will effectively handle this application, the size and hardness of the material must be known.

Frequently asked questions. ... Production blasting and tunnelling - Proven reduced dilution in fold, platinum and diamond mining ... the build up of pressure in the hole is directly related to the burning or detonation rate. At the point in time at which the rock surrounding the drill hole starts to dislodge, the gas contained in the drill ...

However rock excavation is a fact of construction life and must be anticipated by the Construction Supervisor. Prior to a project beginning, an Owner has probably already considered the possibility of rock in the excavation area and the associated costs.

BHEL Schedule of Rates BHEL ITEM NO DESCRIPTION UNIT Contractors Rate( Rs) Remarks 1 Earth work in surface excavation not exceeding 30cm in depth but exceedign 1.5 m in width as well as 10sqm on plan including disposal of excavation earth upto 50m and lift upto 1.5m, disposal soil to be ... (excluding rock) in trenches, plinth

Rates. Pro Excavations & Plant Hire provides a range of services and plant hire with rates based on per cubic metre, per tonne, per hour or as a fixed project price.

The methodology of calculating the productivity of an excavator emerged together with the first excavator machines. Essentially, excavator productivity is typically measured by the volume of loose or rock soils the machine can displace in a hour of continuous operation. In other words, the productivity of an excavator ...

Guidelines for Hard Material, Rock Excavation ( Nota Teknik Jalan 24-05 ) - Download as PDF File (.pdf), Text File (.txt) or read online. Scribd is the world's largest social reading and publishing site.

The relationship between rock mass quality and ease of excavation ... for determining ripping production based on laboratory tests ... of rock masses and determination of excavation method ...

Note 6 Base Rate Adjustment Factors Factors Adjustment for Noted Conditions Example Production Rate Calculation for Roadway Excavation: Location Rural = 1.0 Small City = 0.85 Big city = .75 Conditions: Rock Excavation around moderate traffic.

Excavation then proceeds by reverse circulation drilling (RCD) using large diameter drilling heads with special rock cutters and flushing by air lift. Bentonite or water levels are always maintained above the ground water level to ensure stability of the shaft.

Hydraulic Breaker Owner's Manual Rock Breakers, Inc. . ... and durability for all construction, demolition, and rock breaking requirements. RBI Hydraulic Breakers use ... production rate is the most crucial factor when trying to choose a breaker size. It is of great benefit to do

Excavation & backfill is usually performed by specialized contractors because the work ... projects are more economical (unit rate is reduced) Productivity ... Microsoft PowerPoint - Pricing Sitework & Excavation Author: alkhalil Created Date:

rock excavation (blasting) cu yd 1500-2500 ** crew size = 9 (includes operators, trucking) range unit/8 hourwork day ... estimated production rates for computing contract time co nr e tpav m unit bituminous pavement unit 3 days 7 days table 2 (2 of 4) drainage unit 3-8 p r day 3-5 per day 3 -6 day s per t u.

Calculate the production rate. EXCAVATOR PRODUCTION. 7 CHAPTER 8. EXCAVATORS ENCE 420 ©Assakkaf Slide No. 12 ... The loading of shot rock would be a typical application. CHAPTER 8. EXCAVATORS ENCE 420 ©Assakkaf Slide No. 15 FRONT SHOVELSFRONT SHOVELS Boom Stick Bucket. 9 CHAPTER 8. EXCAVATORS

A suction excavator or vacuum excavator is a construction vehicle that removes materials from a hole on land, or removes heavy debris on land. Contents 1 Description

8-2 Hydraulic Excavators EXCAVATION TECHNIQUES ... Working in confined quarters is not efficient from a production standpoint. If expecting considerable close-quarter work, plan to use small ... may be more efficient than breaking through hardpan and rock strata with the bucket. Once the trench is open, break the ledge rock by pulling the ...

during railroad construction from 1860 to 1880. History of the Ripper ... made production ripping a popular alternative to drilling and blasting. Design advances, including hydraulic ... economically. Determining whether or not a rock formation can be ripped is not a simple process, but today's technology and experience can help develop a ...

Production Rates - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free.

 · Re: Trenching Production & What Is Average Rate What are you supplying with 2,500 feet of 1" water line? By the time the water gets to the other end, I would imagine that friction will have turned a gushing flow of water to a trickle.

Estimated production rates can be supplied factoring in the reduction of the associated costs, restrictions, extra support equipment and labor requirements. As communities continue to expand,rock excavation facilities