Anchoring - Presentation Slides
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Transcript of Anchoring - Presentation Slides
Product SeminarBK GULF
10-09-2014
Agenda-
1. Stanley Black and Decker 2. How did Dewalt get into anchoring business? 3. Dewalt fasteners - range4. Basic Fastening concepts4. Basic Fastening concepts5. Anchor selection6. Modes of failure7. MEP applications8. Q&A/ Open Discussion
Established in 1843 by Frederick Trent Stanley, as a small hardware manufacturing shop in New Britain, CT
SBD - History
166-year reputation for product quality and service
133 years of consecutive dividends
World-class hand tools portfolio
Established in 1910 by S. Duncan Black and Alonzo G. Decker, who founded a small machine shop in Baltimore, MD
SBD - History
100-year reputation for product innovation and customer focus
72 years of consecutive dividends
SBD - History
+
2010
An S&P 500 company, with 2012 revenue of US$10.2 billion
SBD - History
6
Global supplier of consumer products, industrial tools, and security solutions for professional, industrial and consumer use
Largest hand tool company world-wide
Security SolutionsSecurity SolutionsIndustrial & AutomotiveIndustrial & AutomotiveConstruction & DIYConstruction & DIY
SBD Portfolio
8
Eng. Fastening
Infrastructure
How did DEWALT get into anchor business??
Powers Organization
Branch Office
Headquarters
Powers Organization
R&D Center
Dewalt fasteners- RangeDewalt fasteners- Range
Product Line Overview
SCREW FASTENERS
Self drilling , self tapping screws, roofing screws, etc.
Mechanical Anchors
Through-Bolt PTB-PRO
Heavy Duty PB-PRO
Screw Anchor BT
Drop In DM-PRODrop In DM-PRO
Internal Screw Snake
Undercut Atomic+
Nylon NHS-PRO, KT-PRO
OthersTapper, Sleeve, Shield, Vertigo
Adhesive or chemical anchors
• Concrete anchoring
• Masonry anchoring
• Rebar anchoring
• Concrete anchoring
• Core drilled concrete anchoring
• Rebar anchoring
AC100-PRO Pure150-PRO Pure110-PRO PV50-PRO SC-PRO
• Concrete anchoring
Forced Entry or Direct fastening
Fuel Cell
Nails
Nails and powder charges
P-nails16-76mm,Also with ballistic point
P-nails fastening on
P-nails with various washers
Powder loads in strip green, yellow, red and black
P-nails for thin steel
fastening on steel
P-nails with conduit clip
P-nails for suspended constructions
Nails on strip16-72mm
P3X nails on strip15-60mm
Powder disc yellow and red
Green: LowYellow: MediumRed: StrongBlack: Very strong
Printed Literature
Tech. Manual Buyer’s GuideProduct
Brochures
Basic fastening concepts
LOADS:
• Force / Load F: Resultant load acting in any direction
• Tension loads N: Load component acting in axial direction
• Shear loads V: Load component acting perpendicular to the anchor axis
• Moment M: load acting with lever armN
FN
V
F
Mechanical Adhesive
Expansion Screw Undercut
Torque-controlled DisplacementControlled.Bolt-type Sleeve-type
Cone Expansion
element
Sleeve
Expansion element
Cone Thread Undercut element Adhesive
Plug
Friction Mechanical interlock Bond
DEWALT Products
Bolt-typeExpansion Anchor
“Throughbolt”
Sleeve-typeExpansion Anchor
“Heavy Duty Anchor”
Screw Anchor
AdhesiveAnchor
UndercutAnchorDrop-in
• PTB• PTB-SS
• PB• PB-SS
• DM • BT• Snake
• Atomic
• AC100• Pure150• PV 50 • SC Pro
Base Plate and Member GeometryBase Plate and Member Geometry
Base plate design includes thickness and projection of the anchors required to
• Anchor spacing s
• Edge distance c
• Member thickness h
Meeting minimum dimensions helps in avoiding splitting of base material during installation
anchors required to avoid plateyielding
Anchor Installation ParameterAnchor Installation Parameter
• hef - Effective embedment depth
• h1 - Borehole depth
• hmin - Minimum member thickness
• d0 - Nominal drill bit diameter0
• df - Diameter of hole clearance in fixture
• tfix - Thickness of fixture
• Sw - Socket size of wrench
Anchor SelectionAnchor SelectionAnchor SelectionAnchor Selection
Technical Approvals and Listings
• ETA: - Option 1 for cracked concrete- Option 7 for uncracked concrete- Part 6 for multiple anchors in non-structural applications- Part 6 for multiple anchors in non-structural applications
• ESR: In contrast to mechanical anchors (inch/metric), theadhesive qualified for ETA and ESR is identical. In conclusion, ESR complements ETA approved adhesive anchoring systems.
• Fire Rating: - Included in the ETA for mechanical anchors- Additional Report for adhesive anchoring systems
• NSF: US certification of chemical harmlessness in potable water
• VOC: Indoor air Quality measure
Base Material: Concrete
• Uncracked concrete: Concrete in compression
• Cracked concrete: Concrete in tension
If uncracked concrete is not proven by design, cracked concrete has to be assumed
Reinforcement in concrete is an indicator for this zone being tensioned and thus cracked.
deformation
Tension zonecracks
Cracked concrete!
Compressive zoneUncracked concrete
Base Material: MasonryBase Material: Masonry
• Solid bricks: Bricks with less than 15% voids
• Hollow bricks: Bricks with large voids, load transfer is assured by sleeves
In general, masonry requires adhesive anchoring systems, in particular for hollow bricks.
Base Material: OthersBase Material: Others
• Hollow bricks: Bricks with large voids, load transfer is assured by sleevespreventing uncontrolled flow of the adhesive into the caverns
• Wood
• Steel
• Plasterboard
Not within the scope of engineered anchors and their design
Atmospheric Exposure
• Dry internal conditions: Carbon steel, zinc plated
• Atmospheric external conditions: Stainless steel (SS316 / A4)• Atmospheric external conditions: Stainless steel (SS316 / A4)
• Particular aggresive conditions: High corrosion resistance (HCR) steel- Splash zone of sea water- Chloride atmosphere of indoor swimming pools- Industrial air with extreme chemical pollution- Road tunnels
Ambient Temperature
• Installation temperature: Low temperatures during curing slow downchemical reaction and reduces bond strength
Temperature impacts curing and properties of adhesives
chemical reaction and reduces bond strength
• Service temperature (Short term / Long term): High temperatures increasecreep, i.e. displacements under permanent load
- Short term temperatures vary over short intervals, e.g. day/night- Long term temperatures will be approximately constant over time
Water During Installation
• Wet boreholes: Adhesive is approved for wet boreholesNote: ETAs recognizes only dry/wet category;
ESRs differentiate between dry and wet boreholes
Curing of adhesives may be inhibited by water or moisture
ESRs differentiate between dry and wet boreholes
• Flooded holes: Adhesive can be installed in water filled holes
Loading Types
• Static: Dead loads and other permanently or temporarily acting loadsincluding snow
• Qasi-static: Live loads varying at low rates such as traffic and moving loads
• Seismic: Earthquake actions resulting in cyclic loads and cycled cracks• Seismic: Earthquake actions resulting in cyclic loads and cycled cracks
• Wind: Load demands deriving from moderate wind are covered bythe approval for quasi-static loading
• High wind: Generally, anchors are considered fit for applications in areasprone to typhoons if they are approved for seismic loading
Installation Types
• Preset installation: Anchor is installed first and then the fixture is attached→ Common procedure for adhesive anchors→ Required for anchors which are larger in diameter→ Required for anchors which are larger in diameter
than the clearance hole in the fixture (e.g. DM,Snake and Atomic through-type)
• Through installation: Fixture is placed first and then the anchor is installed→ Mechanical anchors with a formed head
(e.g. PB and BT) require through installation
• Standoff installation: Element to be anchored is mounted at a distance to the surface of the base material, thus creating abending moment in the anchor→ Not possible for anchors with a formed head
Redundant Anchorage
Anchors qualified according to ETAG 001 Part 6 are only approved for ‚ multiple use for non-structural applications. This means that this anchor and size may only be used for redundant ancorage of non-structural components and systems (NSC).and systems (NSC).
Core Drilling
In contrast to hammer drilled boreholes, diamond drilled boreholes have a very smooth surface reducing micro-locking and thus bond strength of the adhesive. For this application, adhesive anchoring systems need specific approval.approval.
Diamond-drilling is mainly used for:
• Large borehole diameters
• Multiple boreholes
• Boreholes in densely reinforced concrete
micro-locking
MODES OF FAILURE
NV
ANCHOR FAILURE(Steel)
Tension forces N Shear forces V
Steel failure
Steel failure
CCD-Method
α
V
BASE MATERIALFAILURE(Concrete)
concrete cone
failure
splitting
failure
pull-out
failure
.
edge
failure
pry-out
failure
Approvals and Verification
Regular 3 rd Party QC Verification Audits at all Production Poin ts
TECHNICAL SUPPORT
DATA COLLECTION FORM
Failure occurs due to-
1. Incorrect installation•We can provide training on job site•We can provide verification by a pull out test that the installation was carried out alright or not
2. Wrong anchor selection
3. Lack of design
•We can advice at the point of sale
• DDA •Technical services to design anchor cases
We have 2 types of machines-1. Hydraulic- Post installed rebar(max T25) and anchors
in concrete upto (M12- M24) 300KN 2. Hydrajaws – anchors in weaker base materials,
concrete (M8-M10) up to 30KN
MEP anchoring applicationsMEP anchoring applications
ELECTRICAL-
For suspending cable trays, bus bars andtrunking on the underside of slabs anchorsare used. These anchors should haveapproval for cracked concrete andguidelines for redundant fastening shouldbe followed. Any of these anchors couldbe used, depending on the situationbe used, depending on the situation
PTB PRO
DM PRO
VERTIGO
ELECTRICAL-
Where electrical services are floorsupported, a range of anchors can beused. Mechanical anchors are morepopular than chemical fixings here.
Any of these anchors could be used,depending on the situation
PTB PRO
DM PRO
FHS
ELECTRICAL-In electrical shafts/risers to fix bus barand cable trays onto the shaft wall arange of anchors are required. The basematerial could be concrete or block . Anyof these anchors could be used ,depending on the situation
PTB PRO
DM PRO
SAP
FHS
AC 100
PLUMBING-
For suspending pipes on the underside ofslabs anchors are used. These anchorsshould have approval for cracked concreteand guidelines for redundant fasteningshould be followed. Any of these anchorscould be used, depending on the situation
Also there might be a requirement for firerating on the anchors
PTB PRO
DM PRO
VERTIGO
PLUMBING-
In pipe shafts/risers to fix pipes onto theshaft wall a range of anchors are required.The base material could be concrete orblock. Any of these anchors could beused, depending on the situation
PTB PROPTB PRO
DM PRO
SAP
FHS
AC 100
DUCTING AND CHILLED WATER-
For suspending CHW pipes and ducts onthe underside of slabs, anchors are usedalong with supports. These anchors shouldhave approval for cracked concrete andguidelines for redundant fastening shouldbe followed along with other relatedstandards. Any of these anchors could bestandards. Any of these anchors could beused, depending on the situation
PTB PRO
DM PRO
VERTIGO
HEAVY SUPPORTS-
When heavy pipes and other HVAC componentsneeds to be supported they are normallysupported onto concrete. Any of these anchorscould be used, depending on the situation
In certain conditions anchors are subjected to loads that are dynamic in nature and where they need to have an seismic approval or rating.
Q&A/Open discussionQ&A/Open discussion
THANK YOUTHANK YOU