1 DRILLED SHAFTS Section 465 of Standard Specifications
2 What is a Drilled Shaft? Type of substructure foundation. A cylindrical shaft excavated into the ground and then filled with resteel & concrete. Supports loads primarily through skin friction between the concrete and the adjacent soil. End bearing generally not considered. Typical sizes: 30 to 72 in diameter and can extend 50 or more into the ground.
3 What is a Drilled Shaft? Drilled shafts require rigorous inspection. Initial plan review is a must. Should read Section 465 of Standard Specs to clearly understand different types of shaft construction. Need to become familiar with procedures in the specs in event problems are encountered.
4 Casing Most drilled shafts require a steel casing to be used to facilitate the shaft excavation. The casing is a steel plate rolled and welded to form a large diameter pipe. Casings are placed either before, during or after excavation. Casings are large enough in diameter to permit the drilling auger to pass through them. They should have teeth on the bottom to allow anchoring of the casing into the desired soil formation.
7 3 Basic Methods of Construction Dry Construction Method Temporary Casing Method Permanent Casing Method Sometimes a combination of the above types of drilled shaft construction methods is used.
8 Preparing for Construction: Prior to Construction the Contractor needs to address 3 items, required by specification. They are: -1. Concrete Mix Design. -2. Drilled Shaft Installation Plan. -3. Drilled Shaft Preconstruction Meeting.
9 Drilled Shaft Concrete Mix Design Contractor must submit a concrete design mix along with materials, including water reducer, to Central Materials Lab at least 40 days prior to construction, for approval. The materials are used by the Lab to verify the Contractor s proposed mix design.
10 Concrete Mix Requirements 28 Day Compressive Strength = 4500 psi Slump Range: 6 to 8 for free fall or tremie method 7 to 9 for concrete pumped through a tremie. In addition, slump shall be maintained above 4 for 4 hours after batching (set retarder). Entrained Air Content of 5% to 7 1/2% Max. Water/Cement Ratio for Design of Mix = 0.44 (Each established mix design will have a maximum water/cement ratio) Slump achieved by use of water reducer. Superplasticizers are NOT allowed. Minimum Cement Content of 780 lbs/yd 3
11 Drilled Shaft Installation Plan Contractor must submit a Detailed drilled shaft installation plan 30 days prior to drilled shaft construction.
12 Equipment List Cranes Drill Augers Pilot Bits Bailing Buckets Cleanout Equipment Water Pumps Tremies Concrete Pumps Concrete Chutes Steel Casing Diameter Wall Thickness
13 Construction Sequence and Methods Sequence of Shaft Construction Elevations of Proposed Work Berms or Platforms Contractor is required to verify site conditions prior to installation plan submittal. How Casing is to Be Installed Method(s) of Excavation
14 Method of Cleaning Out Excavation Details of Resteel Centering Devices Method of Lifting & Supporting Resteel Cage Method(s) of Concrete Placement
15 Pre-Drilled Shaft Meeting Pre-Drilled Shaft Meeting is Mandatory 5 Working Days Prior to Construction of Drilled Shafts.
16 Representatives of the Following are Required to Attend: Bridge Contractor Drilling Sub-Contractor Concrete Supplier Area Office Office of Bridge Design and/or Foundations
17 Purpose Drilled shaft construction can be complex. There are many unknowns. Successful drilled shaft construction depends on everyone involved being fully aware of what each parties responsibilities are. Meeting is used to review step-by-step the procedures and construction methods used. Possible problem scenarios are reviewed & corrective construction procedures are discussed.
18 Drilled Shaft Excavation: Dry Construction Method Drill the shaft through relatively stiff, stable soil formations in which ground water infiltration is not a problem. Not typically used in SD because of this. Clean out bottom of excavation. Set the resteel cage in proper position. Place concrete.
19 When Dry Excavations Encounter Caving or Water Bearing Soils: Contractor should immediately stop drilling The hole should immediately be filled with water to a point above the groundwater elevation. A positive 10 foot head of water should be maintained above the groundwater elevation if possible.
20 Temporary Casing Method -Can be used when shafts are drilled through a layer of granular material, before hitting bedrock, causing side wall caving, shaft squeeze or water infiltration. -The Temporary Casing Method is used when: Excavations, begun by the Dry Construction Method, encounter caving or water bearing soils, or when Specified on the plans.
21 Temp. Casing Method When the Temporary Casing Method is Specified on the Plans: The steel casing is drilled or pushed through the unstable soils prior to the start of excavation. All other procedures are the same as previously discussed.
22 Temp. Casing Method A cleanout bucket is used to clean the bottom of the excavation. The resteel cage is placed in the proper location. Concrete is placed. The casing is extracted during concrete placement.
23 Permanent Casing Method A steel casing is drilled or pushed through the unstable material prior to start of excavation. The drilled shaft is excavated through the steel casing. If water is encountered, a positive head of water is required just the same as was discussed for the Temp. Casing Method
24 Permanent Casing Method The steel casing is left in place. It may sometimes be required to remove portions of the permanent casing after the concrete has attained strength. A cutoff saw, or other approved methods, are required for removal of the casing. Torch-cutting is NOT allowed (unless used before concrete placement)
25 A Combination of These Methods May Be Used The foundation conditions may be such that a casing is required through unstable soil, but the casing is able to be seated into the underlying foundation material such that water infiltration is stopped. This results in a casing being used through the unstable material, but the dry construction method is utilized for the remainder of the drilled shaft.
26 Drilled Shaft Inspection Preliminary Inspection Prior to Drilling
27 Inspection Equipment Plans and Specifications Rod and Level 100 ft. Weighted Tape Mirror Carpenter s Level
28 Location of Drilled Shafts Verify Location of Stakes Check by more than one method Check or Set Offset Stakes Set Temporary Bench Mark May be able to establish elevation of one or more of the offset stakes.
29 Casing Check and Record Casing Dimensions Diameter Length Roundness Make Sure Casing Length has been Adjusted for Work Berms, Etc.
30 Resteel Cage Check Resteel Cage for: Proper Number, Size, and Grade of Bars Proper Diameter and Pitch of Spirals or Hoops Proper Splice Lengths Adequate Approved Centralizers CSL Tubes Correct Spacing and Length Length Adequate to Allow for Splice at Construction Joint
33 Contractor s Equipment Verify that all Equipment Listed in the Drilled Shaft Installation Plan is on the Site and is in Good Working Condition.
34 Mandatory Equipment Tremie (Even if concrete is to be pumped) T-Bar Cleanout Bucket of proper size Pilot Bit Water Pump Weighted Tape
38 Concrete Make Sure Mix Design has been Approved Check Inside of Tremie Pipe to Assure it is Clean To function properly, Tremie Pipe must be smooth inside. If concrete was not properly cleaned on previous use, concrete will not flow.
39 Drilled Shaft Inspection Setting Casing
40 Setting of the Casing Specifications Require that Casing be Installed using a T-Bar on the Kelly Bar. Accurately Setting Casing can be Difficult Re-check location and Plumbness often Check to assure that casing didn t become outof-round during installation.
41 If Casing Needs to be Removed and Replaced with a Longer Casing, the Excavation is Backfilled Before the New Casing is Installed Bottom of Casing Should be Screwed into Foundation Material to Attain Watertight Seal if Possible Top of Casing Should be at the Approved Construction Joint Location Typically 1 foot above groundline
44 Drilled Shaft Inspection Excavation
45 Inspection of Excavation Excavation into Frictional Bedrock Should not be Allowed Unless it can be Reasonably Expected that Excavation and Concrete Placement will be Completed the Same Day 24 Hour Time Limit Begins upon excavation into frictional bedrock Frictional Bedrock Elevation is designated on plans
46 Record Time that Frictional Bedrock Elevation is Reached Re-Check Location, Plumbness and Depth Often During Excavation Measure from offset stakes for location Use Carpenter s Level on kelly bar for plumbness Use weighted tape to check depth A Mirror Should be Used to Periodically Check Sides of Excavation for Caving or Water Infiltration
47 If Caving or Water Infiltration is Encountered the Contractor Should Immediately Flood the Excavation with Water When the Excavation Reaches Plans Depth, The Contractor Must Clean the Bottom of the Excavation with the Cleanout Bucket Use the mirror to inspect the bottom of the excavation if the excavation is dry If the excavation is wet, require continued use of the cleanout bucket.
49 Drilled Shaft Inspection Resteel Placement
50 Resteel Placement Ensure CSL (Crosshole Sonic Log) tubes are in place before resteel cage is placed Extreme Care Needs to Used in Lifting the Resteel Cage into Place Long Resteel Cages may need to be lifted at more than one point so as not to cause permanent deformation during lifting.
51 Resteel Placement The Resteel Cage Shall be Carefully Lowered into the Excavation If centralizers are knocked off or damaged during resteel placement, the cage shall be raised from the excavation and the centralizers replaced.
54 Resteel Placement The Resteel Cage Shall be Properly Supported Off of the Bottom of the Excavation Held up by use of crane or other equipment Concrete Donut can be attached to bottom of cage
56 Resteel Placement Resteel Cage also Needs to be Tied Down Concrete can FLOAT the resteel cage up during concrete placement Do not tie resteel cage to casing. If resteel cage settles or floats during concrete placement, the watertight seal at the bottom of the casing may be broken.
57 Resteel Placement Check Resteel Extension above Construction Joint to Assure Specified Minimum Splice Length
58 Drilled Shaft Inspection Concrete Placement
59 Concrete Placement in a Dry Excavation Dry Excavation is defined as an excavation in which water accumulates at a rate of no more than 3 inches per hour.
60 The Excavation is to be Dewatered Immediately Prior to Concrete Placement No more than 3 inches of water allowed in bottom of excavation For Drilled Shafts 36 inches in Diameter or Less, Concrete Shall be Placed Through a Drop Tube that Extends to the Bottom of the Excavation Typically, the tremie is used
61 For Drilled Shafts 36 Inches in Diameter or Larger, Concrete May be Placed by the Free- Fall Method A hopper with a drop tube is required to assure that the concrete is dropped down the center of the excavation so as not to fall through any resteel.
63 Concrete Placement in a Wet Excavation Concrete Must be Placed Underwater Utilizing the Tremie Method This can be achieved either by use of a tremie or a concrete pump
66 Tremie Method Excavation is Partially or Fully Filled with Water Mark Tremie at Five Foot Intervals The End of the Tremie is Plugged The pig(a foam ball) is placed in the pump and pumped into the shaft to separate the concrete from water in the shaft The pump line needs to be at leaste 4 diameter and be steel for the length of the shaft
67 The Empty Plugged steel pump line is Lowered to the Bottom of the Excavation As the pump is started slowly lift the pump line as the shaft fills making sure the line is imbedded in fresh concrete at least 5 feet
69 Process Continues Until all Water has Been Displaced and Enough Concrete has Run Out of the Shaft Such that Only Uncontaminated Concrete Remains. Concrete Placement Should be Performed in One Continuous Operation.
70 Restarting a Tremie If a problem is encountered and Restarting is Required the tremie must be used: The pump line is inadvertently raised such that the minimum 5 foot embedment is not maintained. There is a delay in concrete placement of more than 30 minutes. The pump line plugs.
71 Tremie Pipe Requirements Must be Steel Do not allow the use of Aluminum 7.5 Min. Inside Diameter 1/4 Min. Wall Thickness Watertight Joints Gasketed & Bolted Welded Smooth Interior Free of Hardened Concrete
72 Steps to Restart a Tremie Measure and Record Depth to Top of Concrete. Remove pump line Put Plug on End of Tremie Push Empty Plugged Tremie into Concrete to a Minimum Depth of 5 Feet Below Measured Depth Follow Same Procedure as to Begin Placement
73 Work Adjacent to Fresh Concrete Drilling Operations and Free-Fall of Concrete in Adjacent Shafts Can Result in Vibrations Damaging Freshly Placed Concrete This can be monitored by driving a stake into the ground near the fresh concrete and setting a glass of water on top of the stake If ripples appear on the water, operations should be stopped Should not resume these operations for at least 72 hours after concrete placement or until the concrete attains a minimum compressive strength of 1600 psi.
74 Construction Tolerances Horizontal Position 1/12 Shaft Dia. or 3 Inches, Whichever is Less Bottom of Shaft Elevation Plus or Minus 6 Inches Vertical Alignment 1/4 Inch per Foot Depth or 3 Inches, Whichever is less
75 Diameter of Shaft Plus 2 Inches Top of Shaft Elevation Plus or Minus 1 Inch Bottom of shaft shall be relatively flat. Consideration Needs to Be Given to the Fact that the Shafts May be an Extension of the Column Which Require More Stringent Construction Tolerances.
77 Drilled Shaft Construction Report (DOT Form 297) Should be Completed for Each Drilled Shaft Constructed All Events of the Drilled Shaft Construction Should be Thoroughly Documented on the Form
78 CSL Testing Cross Hole Sonic Log (CSL): Test that determines the integrity of the newly placed drilled shaft concrete. Test requires an ultrasonic pulse to pass through the concrete through water filled access tubes. Access tubes are secured to the inside of the rebar cage, and should extend 4 feet above construction joint and be within 3 inches of the bottom of the resteel cage and are cast in the concrete during placement.
83 CSL Testing Concrete quality is based on the relationship between pulse velocities and the receiver response energy. High velocities indicate sound quality concrete.
84 CSL Testing Testing will be done by an independent testing organization proposed by the Contractor and approved by the DOT. Acceptance of the drilled shaft will be the decision of the DOT (Foundations Office), based on the results of the CSL reports and other information about the shaft placement.
85 CSL Testing In the case that any shaft is determined to be unacceptable, the Contractor shall submit a plan of remedial action for approval. All costs to perform this remedial action will be at no cost to the State.
86 CSL Testing CSL testing will be used on all single column bents or when drilled shaft construction is suspect. If drilled shaft construction goes well, no CSL testing will be required. After final acceptance of a shaft, the access tubes shall be de-watered, cut off at construction joint and grouted full according to the plans. Any CSL questions?
July 14, 2015 1.0 GENERAL BI-DIRECTIONAL STATIC LOAD TESTING OF DRILLED SHAFTS This work shall consist of furnishing all materials, equipment, labor, and incidentals necessary for conducting bi-directional
Tremie Concrete Underwater concrete plays an important role in the construction of offshore structures. It may be used to tie together various elements in composite action (i.e., to tie piling to the footing).
Supplemental Technical Specification for High Strain Dynamic Load Testing of Drilled Shafts SCDOT Designation: SC-M-712 (9/15) September 3, 2015 1.0 GENERAL This work shall consist of performing high-strain
SECTION 206 EXCAVATION FOR STRUCTURES 206.1 Description. This work shall consist of the necessary excavation for the foundations of all structures, removal and disposal of all excavated material, backfilling
ITEM #0702770 OSTERBERG CELL LOAD TESTING OF DRILLED SHAFT Description: This work shall consist of furnishing all materials, equipment and labor necessary for conducting an Osterberg Cell (O-Cell) Load
FORM A PTS HELICAL PIERS INSTALLATION SPECIFICATIONS NOTICE The following suggested specifications are written as a guide to assist the specifier in writing his own specifications. Specific circumstances
Page 1 of 9 SAMPLE GUIDE SPECIFICATIONS FOR OSTERBERG CELL LOAD TESTING OF DEEP FOUNDATIONS 1. GENERAL REQUIREMENTS 1. Description of Work: This work consists of furnishing all materials, equipment and
4.01 SCOPE OF WORK The work covered by this section shall consist of furnishing all materials, equipment and labor for the excavating, trenching, backfilling, and bore and jack required to install or repair
TECHNICAL SPECIFICATIONS CEMENT-BENTONITE SLURRY TRENCH CUTOFF WALL SCOPE This section of the specifications includes requirements for the Slurry Trench Cutoff Wall and related work as indicated on the
PART 1 GENERAL 1.1 SCOPE: A. This item includes the work necessary for the construction and installation of sanitary sewer manholes. B. The Contractor may, at his option, use cast-in-place type manholes,
SECTION 15062 POLYVINYL CHLORIDE (PVC) GRAVITY SEWER PIPE AND FITTINGS PART 1 GENERAL 1.01 DESCRIPTION This section designates the requirements for the manufacture and installation of polyvinyl chloride,
SECTION 334310 - POLYETHYLENE SEPTIC SYSTEM TANKS PART 1 GENERAL 1.1 Contractor shall furnish and install (Qty) Roth MultiTank or equivalent HDPE polyethylene septic tanks plus fittings and fixtures as
SECTION 5200 - STORM SEWER PART 1 - GENERAL 1.01 SCOPE: This Section covers installation of storm sewer mains and culverts. Topics include permits and fees, trench widths, pipe laying, bedding, initial
SECTION 33 31 00.11 GRAVITY SANITARY SEWERS PART 1: GENERAL 1.01 SCOPE A. Gravity sanitary sewers and appurtenances. 1.02 SUBMITTALS A. Conform to requirements of Section 01 33 00 Submittals. B. Submit
Page 1 of 6 SECTION 1 GENERAL REQUIREMENTS 1. SCOPE OF WORK: The work to be performed under the provisions of these documents and the contract based thereon includes furnishing all labor, equipment, materials,
PRECAST CONCRETE PAVEMENT SLAB SYSTEMS (Tollway) Effective: March 30, 2009 DESCRIPTION This specification covers material and fabrication requirements for precast concrete pavement slab systems. The precast
SECTION 03 48 20 VALVE BOXES AND METER VAULTS PART 1: GENERAL 1.01 SECTION INCLUDES A. Valve boxes for water and cleanout boxes for wastewater service. B. Meter boxes for water service. C. Meter vaults
STRUCTURES 1. General. Critical structures may impact the integrity of a flood control project in several manners such as the excavation for construction of the structure, the type of foundation, backfill
Page 1 of 7 STONE STRONG SYSTEMS SPECIFICATIONS FOR PRECAST MODULAR BLOCK RETAINING WALL SYSTEM (revised ) PART 1: GENERAL 1.01 Description A. Work includes furnishing and installing precast modular blocks
PART 1 - GENERAL Section 02702 SEWER PIPE INSTALLATION AND TESTING 1-1. SCOPE. This section covers the installation and testing of all sewer pipe furnished under the following specification sections: Concrete
SECTION 15200 GRAVITY SANITARY SEWERS PART 1 GENERAL.01 SCOPE A. Gravity sanitary sewers and appurtenances, including stacks and service connections..02 SUBMITTALS A. Conform to requirements of Section
SANITARY SEWER SPECIFICATIONS OCTOBER 2003 HARVEST-MONROVIA WATER, SEWER, AND FIRE PROTECTION AUTHORITY SECTION 1.00 1.10 Purpose The purpose of this document is to assemble the sewer specifications, policies,
FOUNDATION ALTERNATIVES TO MITIGATE EARTHQUAKE EFFECTS 13.17 FIGURE 13.11 Excavation for the grade beam that will span between the two piers. Usually this foundation system is designed by the structural
6.01 SCOPE The work covered by this section of the specifications consists of the furnishing of all plant, labor, materials, equipment and supervision and performing all operations involved in the construction
Micropiles Reduce Costs and Schedule for Merchant RR Bridge Rehabilitation Jeff R. Hill, P.E. Hayward Baker Inc. 111 W. Port Plaza Drive Suite 600 St. Louis, MO 63146 314-542-3040 JRHill@HaywardBaker.com
ITY OF PRLN UGRING PIP OR SING FOR SWRS Section 02415 UGRING PIP OR SING FOR SWRS 1.0 G N R L 1.01 STION INLUS Installation of pipe and casing for sanitary sewer by methods of augering. References to Technical
ITEM NO. 816 STEEL PIPE INSTALLATION 816.1 DESCRIPTION: This item shall consist of steel pipe installation in accordance with these specifications and as directed by the Engineer. 816.2 SUBMITTALS: Contractor
SECTION 014500 QUALITY CONTROL PART 1 GENERAL 1.01 RELATED REQUIREMENTS A. Drawings and General Provisions of Contract, including General and Special Conditions and other Division 1 Specification Sections,
SECTION 05 21 00- STEEL JOIST FRAMING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-01 Specification
STANDARD SPECIFICATION SECTION 02200 EARTHWORK PART 1 - GENERAL 1.01 DESCRIPTION This section includes materials, installation and testing of earthwork for excavations, fills and embankments for structures
Table of Contents 1. Maintenance and Protection of Traffic During Construction and During Temporary Suspension of Work (including Placing and Resetting Temporary Concrete Barriers)... 900-1 2. Temporary
TYPES OF PIERS USED IN NORTH AND EAST TEXAS RESIDENTIAL FOUNDATION REPAIR If you listen to the hype, it sounds like there must be 20 or 30 different types of piers out there. Company A says they have an
PRECAST CONCRETE PAVEMENT SLAB SYSTEMS (Tollway) Effective: Description. This specification covers material and fabrication requirements for precast concrete pavement slab systems. The precast concrete
ITEM 400 EXCAVATION AND BACKFILL FOR STRUCTURES 400.1. Description. Excavate for placement and construction of structures and backfill structures. Cut and restore pavement. 400.2. Materials. Use materials
SECTION LS 2530 SANITARY SEWERS PART 1 GENERAL 1.1 SUBMITTALS A. General: Submit the following in accordance with The General Conditions. 1. Product data for drainage piping specialties. 2. Shop drawings
PART 1 GENERAL 1.01 SCOPE OF WORK A. Furnish all labor, materials, and equipment required to install precast concrete manholes, sanitary leaching rings, pump station, valve chamber, structures, frames,
City of Bellevue POST-TENSIONED CONCRETE PRECONSTRUCTION MEETING AGENDA APPENDIX B3 Project Name/Location: Meeting Date: First Pour Date: Project Team Name/Company Phone Email Building Official* Building
DRILLED SHAFT INSPECTOR S CHECKLIST The following is a general checklist to follow when constructing a drilled shaft. The answer to each of these questions should be YES or NA unless plans, specifications
Section 06600 Fiberglass Reinforced Plastic Grating and Structural Fabrications Part 1. General 1.01 Related documents: A. Contract drawings, including general drawings and addenda drawings. B. General
Residential Statement of Special Inspections** CNI-033R Name of Owner Address Permit Number Job Description This Statement of Special Inspections is submitted to outline the requirements of 2013 CBC Chapter
Proposed Minimum Subterranean Termite Treatment Standards Introduction This document is intended to serve as a model for states considering the adoption of standards for soil application of termiticides.
Structures Construction Pre-Work Checklist PRE-WORK SHEET FOR PROJECT MANAGERS 1 Proposal & Plans Received? 2 Review Proposal, highlight important facts. Know proposal well to be able to find answers quickly.
TORONTO TRANSPORTATION January 2012 TS 802 HANDWELLS TABLE OF CONTENTS 1. DRAWINGS TTD 802.001 TTD 802.005 TTD 802.006 TTD 802.010 TTD 802.020 TTD 802.021 TTD 802.026 HANDWELL CAST IN PLACE WITH 320 mm
NCMA TEK National Concrete Masonry Association an information series from the national authority on concrete masonry technology GROUTING CONCRETE MASONRY WALLS TEK 3-2A Construction (2005) Keywords: cleanouts,
Design and Construction of Auger Cast Piles 101 th Annual Road School 2015 3/11/2015 Malek Smadi, Ph.D., P.E. Principal Engineer - GEOTILL - Fishers, IN email@example.com - www.geotill.com CONTENTS 1.
SECTION 51 PIPE INSTALLATION FOR WATER MAINS 51. 1 GENERAL Pipe shall be installed in accordance with the manufacturer's specifications and instructions for the type of pipe used and applicable AWWA standards,
SECTION 02466 DRILLED CONCRETE PIERS (CAISSONS) PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification
SECTION 02523 - PART 1 GENERAL 1.01 Description A. Scope - This section includes sidewalks, ramps, and mass service area complete with concrete materials, concrete curing compounds, joint materials, field
SECTION 02401 SHEETING, SHORING AND BRACING This section should be edited to reflect soil conditions specific to the project site and the recommendations of a Geotechnical Engineer licensed in the State
Up-Down Construction Utilizing Steel Sheet Piles and Drilled Shaft Foundations Nathan A. Ingraffea, P.E., S.E. Associate, KPFF Consulting Engineers, Portland, Oregon, USA Abstract The use of steel sheet
Section 33 0200- Page 1 of 4 PART 1 - GENERAL 1.1 DESCRIPTION OF WORK The work of this Section includes furnishing and installing Reinforced Concrete Pressure Pipe as shown on the Drawings and as specified.
Lesson 5 Test Pile Program Transcript Welcome to the Pile Driving Inspector Course. This is Lesson 5, Test Pile Program. To begin, select the start button or press Shift+N on your keyboard. The learning
SECTION 05510 METAL STAIRS, LADDERS, AND WALKWAYS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: Technical requirements for metal stairs, ladder, and walkways. 1.2 REFERENCES A. General: References to
6 Index inlet protection excavated drop inlet protection (Temporary) 6.50.1 HARDWARE CLOTH AND GRAVEL INLET PROTECTION Block and gravel inlet Protection (Temporary) sod drop inlet protection ROCK DOUGHNUT
Pro-Lift Steel Pile Foundation Repair Pro-Lift Steel Pile Foundation Repair System Pro-lift steel piles are designed for the stresses of Texas soils. They can have multiple steel walls, depending on the
TYPICAL SPECIFICATION ECP Helical Torque Anchors New Construction Piles Section 1- General 1.01 Typical Installation Scope Furnish labor, equipment, tools and material to install Helical Torque Anchors
Bridge Component Concrete Standard Ministry of Forests, Lands and Natural Resource Operations All concrete bridge component products supplied for the Ministry of Forests, Lands and Natural Resource Operations
Indiana State Department of Health Construction Guidelines for Gravity and Flood-Dose Trench Onsite Systems The septic tank-absorption field sewage treatment system is composed of two major elements; the
Sanitary Sewer Design, Construction & Maintenance Manual Version Issued: September 2010 Ryan Eastwood, P.E. Director of Engineering and Utilities City of Ashland, Kentucky Table of Contents 1) Purpose.....
Chapter 4 Bridge Program Drawings Section 4.19-Reinforcing Steel Introduction Because concrete has a low tensile strength, reinforcing steel is embedded in the concrete to resist the applied loads causing
SECTION 034200 PRECAST HOLLOW CORE SLABS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification
California Department of Transportation Doyle Drive Test Program Deep Soil Mixing (DSM) /Cutter Soil Mixing (CSM) Testing Report By Malcolm Drilling Company, Inc. 3524 Breakwater Ave., Suite 108 Hayward,
CHAPTER 4 INSTALLATION OF PIPE AND TESTING OF PIPE BACKFILL Why talk about pipe in a Soils and Aggregate School? Pipe-soil interaction is critical to successful performance of system Treatment of soils
CITY AND COUNTY OF DENVER ENGINEERING DIVISION Wastewater Capital Projects Management Standard Construction Specification 10.1 Precast Concrete Pipe 10.1.1 General This section covers material requirements,
SECTION 31 40 10 PART 1 - GENERAL 1.01 SUMMARY A. Provide helical screw foundation system, complete. Work consist of providing required engineering, supervision, labor, tools, materials, equipment, means
SECTION 55 PIPE FOR STORM DRAINS AND CULVERTS (FAA D-701) 55-1 GENERAL The Contractor shall perform all work required by the plans for construction of pipe for storm drains, precast polymer trench drains
SECTION 7 FOUNDATIONS TYPICAL CONSTRUCTION METHOD Before any new building is erected, remove all stumps and roots from the soil to a depth of at least 12" below the surface of the ground in the area to
AGOM EXPANSION JOINTS INSTALLATION PROCEDURE HOW TO REALIZE A JOINT LINE When you have to realize a joint line, workers have to install many units jointed together with a groove-and-tongue junction welded
State of Illinois Department Of Transportation CONSTRUCTION INSPECTOR S CHECKLIST FOR STORM SEWERS While its use is not required, this checklist has been prepared to provide the field inspector a summary
P-5 The P-5 is hot forged from carbon steel. The formed head provis spherical seating that the Lifting Eye engages, while a disc-shaped foot is embedd in the concrete. Due to its being a forged part, the
CCU Engineering Specifications Section 003300 Effective Date: Nov. 1st, 2011 Page 1 of 5 PRECAST CONCRETE PRODUCTS PART 1 - GENERAL The following specification is intended for use for the design, selection
5 Chapter Restoration of Damaged Structures Bringing back a damaged structure to its pre-earthquake state and original strength is called restoration. This is the first step of building rehabilitation.
SUBDRAINS AND FOOTING DRAIN COLLECTORS PART 1 - GENERAL 1.01 SECTION INCLUDES A. Subdrains B. Subdrain Cleanouts and Outlets C. Footing Drain Collectors D. Storm Sewer Service and Connections 1.02 DESCRIPTION
SECTION 32 31 13 CHAIN LINK FENCES PART 1 GENERAL 1.1 SUMMARY A. This Section includes: 1. Galvanized fence framework, fabric, and accessories. 2. Excavation for post bases, and concrete for post footings.
Section 06600 Fiberglass Reinforced Plastic Grating and Structural Fabrications Part 1. General 1.01 Related documents: A. Contract drawings, including general drawings and addenda drawings. B. General
SEDIMENT/STORMWATER MANAGEMENT BASIN CONSTRUCTION CHECKLIST For permanent structures per Delaware SCS Pond Code 378 and Delaware Sediment and Stormwater Regulations KEY PROJECT INFORMATION Item meets standard