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Wednesday, September 26, 2012

Excavation of Unsuitable Material and Back Fill With Suitable Material


EXCAVATION OF UNSUITABLE MATERIAL AND BACK FILL WITH SUITABLE MATERIAL


OBJECTIVE

To outline the work instruction by which the excavation of unsuitable material and backfill with suitable fill is carried out.


REFERENCES  
  • MS ISO 9001 Clause 7.5.1
  • BS 1377 Method of test for soils for Civil Engineering purposes

DEFINITIONS

Unsuitable material – shall include

i) running silt, peat, logs, stumps, perishable or toxic material, slurry or mud, or

ii) any material
- Consisting of highly organic clay and silt.
- Which is clay having a liquid limit exceeding 80% and / or a plasticity index exceeding 55%.
- Which is susceptible to spontaneous ignition.
- Which has a loss of weight greater than 2.5% on ignition.
- Containing large amounts of roots, grass and other vegetable matter.

iii) Suitable Material – shall mean those materials other than the unsuitable materials defined above.

MATERIALS

All Suitable Material / Earth Fill must have record of Proctor Test and Engineer to verify the soil characteristic so as it will suit with the existing earth at the excavated area.


HANDLING AND STORAGE OF MATERIALS

Handling : - Transport for material shall be carried out by dump trucks or other suitable machinery.
Storage : Suitable material / Earth fill must be protected and cover if not been use within 24 hours or as per environmental guideline.


PLANT, MACHINERY AND EQUIPMENT


Excavator, Lorries, Dozer, Compactor and Backpusher.


PREPARATORY WORKS
  1. Obtain relevant approved construction drawing from client / client’s representatives.
  2. Set out the location and limits of work.
  3. Carry out Soil Investigation to determine the depth of unsuitable material and submit the results to the client / client’s representative for decision on depth of unsuitable material that needs to be replaced.
  4. Carry out survey to obtain original ground level and submit to client / client’s representatives.
  5. Identify and obtain approval for disposal site.

WORK METHODOLOGY
  1. Prepare access to the working area and plan for the lorry and plant movements.
  2. Excavate the unsuitable material to the required depth as specified by the client / client’s representative and dispose at approved disposal area.
  3. Transport, fill and spread suitable material in layers. The loose for each layer of fill shall be determined from the trial compaction.
  4. Repeat step 4 until the required level is achieved. Carry out necessary tests as per inspection & test plans :
    • Compaction Trials : The BS 1377 Compaction test (4.5 kg rammer method) shall be used in determining the moisture contest versus density relation of soil.
    •  Degree of compaction : The whole of the embankment below the top 300mm of the subgrade shall be compacted to not less than 90% (for cohesive material) or 95% (for cohesionless material) of the maximum dry density determined in the BS 1377 Compaction test (4.5 kg rammer method)
    • Field Density Testing : Field density tests on each layer of compacted earth fill shall be carried out using sand replacement method in accordance with BS 1377.
    • Moisture control : - Each layer of earth fill shall be processed as necessary to bring its moisture content to a uniform level throughout the material, suitable for compaction. The Optimum moisture content as determined by BS 1377 compaction test (4.5 kg rammer method) shall be used as a guide in determining the proper moisture content at which each soil type shall be compacted.
  5. Submit request for inspection form for joint inspection and joint measurement with client / client’s representative using Earthwork Inspection checklist.
  6. Request client / client’s representative to sign on checklists and maintain all inspection / approval records as per Project Filing Index.
  7. Carry out computation and submit for claim.

Tuesday, September 25, 2012

Hydroseeding Mix and Method Of Application

HYDROSEEDING MIX & METHOD OF APPLICATION

(CAPACITY OF HYDROSEEDER – 1, 000 liters)

HYDROSEEDING MIX
  1. Pump water into hydroseeder to ¾ level.
  2. Free gear and start engine.
  3. Put in mulch (if paper mulch is used – 15 to 20 kg dry weight is recommended)
  4. Next add in 30 kg Soil Tackifier (R1187)
  5. Put in 8 to 10 kg grass seeds. You may add millet if you wish for fast establishment of greens/ vegitation.
  6. Add one bag (40-50 kg) of Bio-Super 1 fertilizer with the mixture.
  7. Finally top up with water.

METHOD OF APPLICATION
  • Before engaging the gear, the person who will do the spraying must hold tight the nozzle and have firm footing on stable ground as he will expect a strong back-kick the moment the slurry shoots out of the nozzle.
  • Do not shoot the slurry directly to the soil surface. Instead, it should be done in the form of raindrops in a uniform pattern. Ensure even coverage of slurry on soil surface. One machine load with proper application can cover approximately 600 to 700 m2.
  • Watering (also in the form of raindrops) on the hydroseeded area can start immediately the next day and must be continued daily in the initial stage to ensure speedy germination and growth. Light watering will not help much due to our hot climatic condition. Therefore, sufficient and proper watering must be done ensuring water seep into the soil yet avoiding overflow of water on the soil surface.

NOTE: Hydroseeding shall never be applied during, before or immediately following rainfall. Avoid application in high winds. Machines and tools should be flushed and clean with water immediately after use. All moving parts should be oiled and greased regularly.

Monday, September 24, 2012

Method Statement For Anti Termite Work

METHOD STATEMENT FOR ANTI TERMITE

1. Scope of Work

a) Main contractor shall notify pest control operator 24 hours in advance that anticipates concrete casting into the area to be treated.

b) Before area treated, Main Contractor shall ensure that all loose timber, wood shaving, loose containing materials be removed from the said allocation area.

c) Pest control operator shall applied Dynamite EC or Termigard 38.7EC (or any other applicable / approve with Termicide 38.7  EC) chemical onto entire ground floor slab area prior to concrete casting.

d) The area surrounding all sides of the column stumps extending to 1 meter below the soil surfaces of to the top of pile cap.

e) Pest control operator shall applied 2 meter all round the building prior to concrete of the apron area.

Sunday, September 23, 2012

Method Statement For Dynamic Load Test And Pile Driving Analysis Test


METHOD STATEMENT FOR DYNAMIC LOAD TEST AND PILE DRIVING ANALYSIS TEST

DYNAMIC PILE TESTING EQUIPMENT

Dynamic pile testing and instrumentation will be performed using the PDA/CAPWAP system on the tested pile.

Measurements of the force and velocity waves induced in the pile during pile testing are collected by force and acceleration transducers, which are fixed near the pile head.

TEST PROCEDURE

Saturday, September 22, 2012

Method Statement For Pile Load Test By Kentledge Method


METHOD STATEMENT FOR PILE LOAD TEST BY KENTLEDGE METHOD

1.0              INTRODUCTION

Vertical Compression pile load test is usually carried out to ensure the structural and Geotechnical soundness of pile and also to predict settlement of other piles. The common procedure is to increase the load in stages until the proposed working load is reached and then to unload and reduce the load in stage and to leave the load off until the rise or rebound substantially leases.

A variety of test procedures and method have been developed for carrying pile load, amongst the most common procedure for pile load test is by using Kentledge method where a static load is apply direction to the pile with the required surplus.

2.0              KENTLEDGE SET-UP

The Standard Kentledge set-up is as shown in Figure 1. The full support system consists of the Test Beam and Kentledge RC Blocks.

3.0              TEST BEAM

Friday, September 21, 2012

Method Statement For Interior Painting

METHOD STATEMENT FOR INTERIOR PAINTING

1.1 DESCRIPTION

Work of this section shall conform to the requirements of the Contract Documents.


1.2 QUALITY ASSURANCE

Execute this work by a firm who has adequate plant, equipment and skilled workers to perform its expeditiously and is known to have been responsible for installation similar to that specified during the immediate past five (5) years.


1.3 WORK INCLUDED

This work shall include supply and installation of paintings works for the building interior.


1.4 SUBMITTALS

  1. No portion of the work requiring submission of shop drawing, product datum, or sample shall be commenced until the submittal has been reviewed and approved by the Consultant Architect, Interior Consultant and P.R. Such portions of the work shall be in accordance with reviewed and approved submittals.
  2. Samples shall fully represent the material to be installed in color, texture and finish range
  3. Submit three (3) copies of manufacturer’s maintenance instructions, including written data on physical characteristics, durability and information on the paint properties to P.R. and Employer.

Thursday, September 20, 2012

Method Statement For External Painting

METHOD STATEMENT FOR EXTERNAL PAINTING


1.1 GENERAL INSTRUCTION

1. All work shall conform to BS 6150; BS 1336, BS 245; MS 125: 1985 Enamel Paints; MS 134: 1989 – Emulsion Paints, Exterior; MS 903: 1987 – Emulsion Paints, Exterior; and approved manufacturer’s specific recommendations.


1.2 RELATED WORK SPECIFIED ELSEWHERE

  1. Unit Masonry Section 04200
  2. Metals Division 5
  3. Woods and Plastic Division 6
  4. Doors and Windows Division 8
  5. Gypsum Board Section 09250
  6. Textured Coatings Section 09835
  7. Mechanical Division 14
  8. Electrical Division 15

Wednesday, September 19, 2012

Method Statement For Remedial Of Honeycomb At Structure Member


METHOD STATEMENT FOR REMEDIAL OF HONEYCOMB AT STRUCTURE MEMBER

Case A: Superficial Honeycomb

  1. To identify the affected area
  2. Removed all the loose particles surrounding the affected area and make sure it was free from dust, grease and oil.
  3. Estimated the quantity of non-shrink grout and water to be used, gradually add the grout into the water and mix it by using spatula or slow speed drill to the consistency required (refer to the mixing ratio guide for water: grout ratio)
  4. Trowel able of stiff consistency mix is adopted to apply onto the affected area by using the steel trowel and leveled it to flush with the original structure member
  5. Repeat item 1 to 4 for any new affected area

Case B: More Severe Honeycomb (Cavity)

  1. To identify the affected area
  2. Removed all the loose particles surrounding the affected area and make sure it was free from dust, grease and oil.
  3. Prepare and install the formwork for the grouting work around the defective area and leave about 25mm gap to pour the non-shrink grout.
  4. Estimate the quantity of non-shrink grout and water to be used, gradually add the grout into the water and mix it by using spatula or slow speed drill to the consistency required (refer to the mixing ratio guide for water: grout ratio)
  5. Pour the mix with non-shrink grout at high workability by using gravity flow
  6. Remove formwork after 24 hours and patch the 25mm gap with stiff mix non-shrink grout.
  7. Repeat item 1 to 4 for any new affected area

Materials

  1. Sika Grout-215
  2. 5 Star Grout

Helpful Calculator In Excel Spreadsheet

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SAMPLE CALCULATION - STANDARD DEVIATION FOR CONCRETE

SAMPLE CALCULATION - STANDARD DEVIATION FOR CONCRETE

To download, click HERE