:: G.E.C.O ::El gharably Engineering Co.

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Intent

The Work Shall Be Carried Out In Accordance With The Requirements Of :

	The Relevant Local Authorities.
	Client Standards.
	Internationally Agreed Working.
	Procedures/Specifications.

Client’s Representative Data

Arranging The Following Necessary Reports For The Project:

	Meteorological Data.
	Topographical Survey.
	Geotechnical Survey.

Site Preparation:

Site Clearance:

The Site Shall Be Cleared Of All Unsuitable Surface Rubbish, Large Boulders Organic Matter

Flood Prevention:

A Stabilized Drainage Ditch Shall Be Provided To Prevent The Surrounding Ground From Draining Into The Site.

Excavation:

The Ground Shall Be Excavated To The Formation Levels, according To The Results Of The Topographic Survey And Design.

Grading:

Areas Where Formation Level Is At Existing Grade Level The Existing Ground Shall Be Scarified To A Depth Of 200 Mm Then Recomputed.

Fill Material:

Fill Material Shall Be Approved Excavated Material Taken From The Site Preparation Excavations. Shall Have A Low Plasticity And Free From Organic Material.

Compaction On Fill:

Fill Material Shall Be Wetted To 30% Of The Optimum Moisture Content And Thoroughly Mixed.

Inspection:

In Field Density Tests The Materials Shall Be Compacted At Least 9 Out Of Every 10 Consecutive Tests On The Compacted. Material Shall Have A Compaction Equivalent To That Specified In Section 2.6 Of This Specification.

Storage Of Fill:

Excavated Material Shall Be Stored According To The Following Procedure:

	The Area Shall Be Stripped Of All Overburden
	And Unsuitable Material.
	Unsuitable Material Shall Be Removed To
	A Location Well Clear Of The Stockpile.
	Various Grades Of Fill Shall Be Stockpiled
	Separately.

Surplus Materials

Unsuitable And Surplus Material From Excavation Shall Be Removed To A Location With Client's Concession And Approval.

Concrete - Plain And Reinforced:

Materials.

Submission Of Samples:

Representative Samples:

After The Contract Has Been Awarded A List Of Supplies Of Materials With Sources Of Supply Shall Be Submitted For The Client's Representative For Approval With Samples Of All Materials To Be Used In The Works.

Routing Samples:

Samples Of Materials Shall Be Delivered To The Client By GECO For Routing and Testing. Supply Shall Not Be Changed Without The Client's Prior written Approval

Cement:

General:

Cements Shall Be Sulfate-Resisting Cement To The Requirements Of ASTM C 150. The Manufacturers' Specification Shall Certify All Cement.

Sampling:

The Client Shall Have The Right To Require GECO To Draw Samples Of Cement From Locations

Testing:

The Cement Samples Shall Be Tested According To The Relevant American Standard Specification And The Client Shall Have The Right To Approve The Laboratory In Which The Tests Are To Be Made.

Storage:

Cement Shall Be Delivered To The Site by A Third Independent Agency For Concrete .

Rejection:

Client Shall Order That Any Consignment Which Does Not Comply With The Specification Shall Not Be Used In The Works And Shall Be Removed From The Site.

Water:

The Water Used In Concrete Shall Be Clean, Potable And Free From Objectionable Quantities Of Suspended Materials And Impurities.

Admixtures:

The Use Of Admixtures Shall Not Be Permitted Unless It Can Be Shown To The Entire Satisfaction Of The Client Representative.

GECO Shall Make Due Allowance For The Time Required To Examine And Test Any Admixture Proposed For Use In The Works.

Reinforcement:

Mild Steel Reinforcement Shall Be Obtained From Approved Suppliers And Comply With The Relevant American Standard.

Concrete Mix Design

Grades:

The Grades Shall Be According To Design Requirements.

Preliminary Trial Mixes:

GECO Shall Submit For The Approval Of The Client’s Representative Details Of The Concrete Mix.

Testing Of Concrete:

The Testing Of Concrete Specimens For The Determination Of Compressive Strength Will Be Carried Out By GECO At His Own Expense In A Concrete Testing Laboratory .

Failure To Meet Requirements

If The Specified Requirements Have Not Been Met , GECO Shall Take Such Remedial Action.

Records:

Slab On Grade

Steel Bars Used Shall Be High Steel Deformed Bars O, With A Minimum Proof Stress Of 3600 Kg/Cm2.

The Final Elevations, Grades, Sequence Of Casting, Panels Dimension And Position Of Joints For Slabs Shall Be Agreed Between Owner And The Contractor

After Completion Of Excavation & Soil Leveling Works, 20 Cm Thick Crushed Stone Layer Shall Be (If Required In Case Sandstone Layer Does Not Appear) Distributed So That The Surface Of The Sub-Base Shall Have The Required Grades After Compaction. Sub-Grade Shall Be Compacted With Pneumatic Roller Of Sufficient Weight & Smooth Wheel Roller, As Directed By Engineers. Relative Compaction Of Sub-Grade Shall Be 95% According To The Modified AASHTO Designation T180 .

Concrete Slabs Shall Be Constructed Mostly In Long Lanes. Method Shall Only Be Used Whenever Critical Grades & Panel Dimensions Exists.

There Are Three Broad Types Of Joints: Expansion Joints, Construction Joints, And Contraction Joints.

Expansion Joints Are Used To Isolate The Slab From Any Fixed Structure Such As Columns, Curbs, Manholes, Catch Basins, Or Between Slabs.

Construction Joints Are Stopping Places For A Day’s Work.

Contraction Joints Are Formed By Saw Cut Every 5m (As Mentioned Above) To Avoid Any Cracks.

Steel Structure

Tanks:

Preparation Of Full Engineering For Tanks According To API 650 And API 620 Specifications For Field Welded Tanks And API 12f For Workshop Welded Tanks.

Supply Of All Kinds Of Steel Materials Grades According To ASTM Standard

Selection And Supply The Proper Welding Electrodes According To AWS 5.1,5.2 Specification For SMAW Welding Or 5.21,5.24 Specification For GMAW Welding

Supply Of The Following:


	Seamless Carbon Steel Pipes For Nozzles
	According To ANSI B 36.10 In Steel Grade ASTM A 106 Gr. B Or According To The Client Specification.
	Class 150 IB. Slip On Raised Face Flanges For
	Nozzles According To ANSI B 16.5 In Steel Grade ASTM A 105 Or According To The Client Specification.

Fabrication Of Tanks According To The Following Breakdown:


	Tank Plates For Field Erected Tanks Out Of
	Carbon Steel Plates, Includes Cut To Size, Edge Preparation For Site Welding And Delivery To The Site In Loose Segments For Shell , Cover And Flat Or Conical Bottoms According To The Api 650.

Our Scope Of Work Also Includes:

Transportation Up To The Sites.

Unloading Of Trucks On Site And Erection Of Tanks. Our Erection Works Include The Following Services:


	Providing Of All Labor For Satisfactory
	Completion Of The Work Within The Project Schedule.
	Providing Of Erection Equipment, Cranes, Tools
	And Auxiliary Material.
	Supply Of Welding Electrodes, Grinding Discs And
	All Other Necessary Consumable.

Execution Of The Following QA/QC Testing On Site After Erection:


	Radio Graphic Examination Of Butt Welds Of
	Tanks Shell Plates According To The Minimum Requirements Of API 650 Code100.
	Vacuum Test According To API 650 For The
	Welds Of Bottom Plates And Sealed Roofs.
	4hydrostatic Test.

These Tests Will Be Executed According To ASME Sec.

General.

Intent:

It Is Intended That This Specification Shall Be Used As A Basis And Guide For The Structural Steelworks Required For This Project. Compliance With The Requirements Herein Specified Does Not Relieve GECO Of His Responsibility To Follow Sound And Accepted Owner Representative Practice Throughout

Codes:

In Addition To The Requirements Contained In This Specification All Design, Materials And Workmanship Shall Conform To The Latest Edition Of The Following Codes And Standards:

	AISC	Specification For The Design,
		Fabrication And Erection Of Structural Steel For Buildings.
	AISC	Specification For Structural Joints
		Using ASTM A235 Or A490 Bolts.
	AISC	Specification For Structural Joints
		Using ASTM A235 Or A490 Bolts.
	AWS D1	Code For Welding In Building
		Construction.
	ASTM 36	Structural Steel.

Fabrication.

General:

All Fabrication Shall Be In Accordance With AISC Specification For Design, Fabrication And Erection Of Structural Steel For Buildings And AISC Manual Of Steel Construction. Fabrication Shall Be In Accordance With The Relevant Design And Detail Drawings. Fabrication Shall Commence Only After Detail Drawings Have Been Approved.

Bolts

All Allowance Of 5% For Wastage Shall Be Made When Supplying Bolts, Nuts And Washers For Site Connections.

Fabricated Assemblies

All Fabricated Frames Shall Be Suitably Braced To Prevent Distortion During Transit. Frames, Platforms, Stairs, Ladders And Handrails Shall Be Shop Assembled In Largest Units Suitable For Handling And Transportation.

Member Marks

All Member Marks Shall Be Painted On Members In A Legible Manner In Accordance With The Erection And Detail Drawings.


	Fabrication.
	Shop And Site Paining.
	Inspection.

Inspection

GECO Shall Supply Mill Test Reports. Owner Representative Reserves The Right To Inspect All Steelworks Prior To Shipment From Fabrication Shop. Approval Of Owner Representative Shall Not In Any Way To Relieve Contractor Of His Responsibility.

Records Shall Be Kept By GECO Of The Positions In The Works Of All Batches Of Concrete, Of Their Grade, And Of All Test Cubes Or Other Specimens Taken From Them.

Transport And Placing

Transport:

The Concrete Shall Be Discharged From The Mixer And Transported To The Works Site .

Placing:

The Concrete Shall Be Placed In Positions And Sequences Indicated On The Drawings, In The Specifications Or As Directed. Concrete Shall Not Be Placed Unless The Client’s Representative Is Present And Has Previously Examined.

Compaction:

The Concrete Shall Be Fully Compacted Throughout The Full Extent Of The Layer.

Vibration:

Unless Otherwise Directed By The Client’s Representative Approved Power-Driven Internal Vibrators Shall Be Inserted At Such A Distance Apart Or Applied In Such A Manner As We Ensure That The Concrete Is Satisfactorily And Uniformly Accepted.

Construction Joints:

Concreting Shall Be Carried Out Continuously Up To Construction Joints.

Curing And Protection:

Concrete Shall Be Protected Against The Harmful Effects Of Sunshine, Wind, Temperature,..Etc.

Formwork And Surface Finish:

General:

Forms Shall Be So Designed And Constructed That The Concrete Can Be Properly Placed And Thoroughly Compacted And That The Hardened Concrete While Still Supported By The Forms Shall Conform Accurately To The Required Shape, Position And Level... GECO Shall Blow Out With Compressed Air Each Day Before Pouring Concrete All Migratory Material That Has Been Deposited Within The Framework And Around The Reinforcement.

Finishing And Tolerances:

Formwork For Buried Concrete Or For Surface Against Backfill Or Further Concrete Will Be Placed, Shall Be Of Any Suitable Approved Material Which Will Prevent The Loss Of Grout.

Striking And Removal Of Forms:

The Client’s Representative Shall Be Informed In Advance When GECO Intends To Strike Any Formwork. The Forms Shall Be Removed Without Damage To The Concrete. The Use Of Oil Or Other Material To Facilitate This Shall Be Subject To Approval.

Bending And Fixing Reinforcement

The Bending Of Reinforcement Bars Shall Be In Accordance With The Drawings. The Bars Shall Be Accurately Bent To The Shapes Shown On The Drawings And/Or Bending Schedules.

Foundations And Structures:

Reinforced And Plain Concrete:

All Reinforced And Plain Concrete Shall Be Designed In Accordance With ACI 318 And Section 3 Of This Specification

Soil Bearing Pressure:

It Shall Be The Responsibility Of GECO To Determine The Permissible Safe Soil Bearing Pressure From The Soil Investigation Reports.

Chamfers:

All Corners Of Exposed Concrete Shall Have A 25-Mm Chamfer.

Depth Of Foundations:

The Underside Of All Foundations Shall Be A Minimum Depth Of 1 M, Or Other Calculated Depth According To Design Basis, Below The Surrounding Grade Level.

Blinding Concrete:

A Layer Of Blinding Concrete Of 50- Mm Minimum Thickness Shall Be Provided Beneath All Foundations And Below Ground Structures.

Top Of Concrete:

The Top Of Concrete For Foundations Shall Be A Minimum Of 300 Mm Above The Surrounding Grade

Anchor Bolts:

Shall Be Made In Accordance With ASTM 36

Grout:

Grout Of 25-Mm Minimum Thickness Shall Be Provided For All Foundations Supporting Equipment, Columns And Structures With Base Plates.

Construction Includes:


	Concrete.
	Excavation.
	Fill.
	Setting Out.
	Grounding Inspection.
	Backfill.
	Anchor Bolts.
	Grouting.

Concrete Paving Design Includes:


	General.
	Drainage.
	Base Course.
	Vapor Barrier.
	Expansion Joints.
	Concrete Works.
	Base Course.

All Concrete Paving Shall Be Designed According To Section 3.0 Of This Specification And ACI 318.


	Finish.

Setting Out.

The Work Shall Be Set Out And Constructed To Dimensions, Coordinates And Elevations Given On The Relevant Drawings.

Membranes.


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