Overview of Different Types of Scaffolding
scaffolding
•
Standards-vertical
members of frame work
embedded into ground
•
Ledgers-horizontal
members parallel to
wall
•
Putlogs-transverse
pieces placed on
ledgers which are
supported on wall
•
Transoms-putlogs with
both ends supported on
ledgers
•
Braces-diagonal pieces
•
Bridle-brige an opening
in a wall it supports one
end in putlog
•
Guard rail-rail provided
with ledger
•
Raker- inclined support
SINGLE SCAFOLDING
Single scaffolding
•
Widely used in
brick work
•
Single row of
standards at a
distance of 1.2m
•
Putlogs are placed
at horizontal
distance of 1.2 to
1.8m
•
Stronger than single
scaffolding
•
Two rows of standards
are provided
•
Distance between face
of wall and first row of
standards is 200mm to
300mm
Cantilever or needle scaffolding
•
May be single or double
scaffolding
•
Needle supported on
floor level
Suspended scaffoldings
•
Used for maintainance
works
•
Working platform
suspended from roof by
ropes, wires or chains
Trestle scaffolding
•
Working platform
supported by ladders,
tripods mounted on
wheels
•
Height of this type of
scaffolding is 5m fro
supporting surface.
TRESSLE SCAFOLDING
Steel scaffolding
•
Steel tubes effectively
used for scaffolding
work
•
Can be used to any
height
•
High intial cost
•
Skilled labour required
Patented scaffolding
•
Made of steel
•
Use of working platform
supported by bracket
PATENDED SCAFOLDING
SHORING
shoring
•
They are temporary
structures
•
Structures become
unsafe due to
unsettlement of
foundations or removal
of adjacent building
•
Shoring is required to
prevent movements.
Circumstances when shoring is
required
•
Adjascent structures is
diamantled
•
Cracks due to unequal
settlement of
foundation
•
Large openings in walls
•
Poor workmanship
Types of shoring
•
Raking or inclined shores
•
Flying or horizontal shores
•
Dead or vertical shores
Raking shores
•
Consist of wall plate ,needles,cleats,rakers,
bracings,sole plate
•
Rakers prevent outward movement of wall
•
Large factor of safety is used for designed of inclined
shores
•
Rakers inclined at 45
ᵒ
•
Sole plate at ground
Flying or horizontal shores
Flying or horizontal shores
•
Horizontal support to
parallel walls
•
Consist of wall plate
,needles,cleats,struts
etc
•
Suitable for max
distance of about 9m
Dead or vertical shores
Dead or vertical shores
•
Needles are supported by
vertical members called
shores.
•
Used under following
circumstances
-
Lower part of wall is
defective
-
-foundations are
deepened
-
-lower part is to be rebuilt
UNDERPINNING
underpinning
•
Placing of new
foundation above
existing foundation
Circumstances used for underpinning
•
Building with deep
foundations constructed
to near building
•
Settlement of existing
foundation
•
Basement is to be
provided to existing
building
•
Existing foundations to be
deepened
Explore the various types of scaffolding, including single scaffolding, cantilever scaffolding, suspended scaffolding, trestle scaffolding, steel scaffolding, and patented scaffolding. Learn about their unique features, uses, and benefits in construction projects.
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Presentation Transcript
Standards-vertical members of frame work embedded into ground Ledgers-horizontal members parallel to wall Putlogs-transverse pieces placed on ledgers which are supported on wall Transoms-putlogs with both ends supported on ledgers Braces-diagonal pieces Bridle-brige an opening in a wall it supports one end in putlog Guard rail-rail provided with ledger Raker- inclined support
Single scaffolding Widely used in brick work Single row of standards at a distance of 1.2m Putlogs are placed at horizontal distance of 1.2 to 1.8m
Stronger than single scaffolding Two rows of standards are provided Distance between face of wall and first row of standards is 200mm to 300mm
Cantilever or needle scaffolding May be single or double scaffolding Needle supported on floor level
Suspended scaffoldings Used for maintainance works Working platform suspended from roof by ropes, wires or chains
Trestle scaffolding Working platform supported by ladders, tripods mounted on wheels Height of this type of scaffolding is 5m fro supporting surface.
Steel scaffolding Steel tubes effectively used for scaffolding work Can be used to any height High intial cost Skilled labour required
Patented scaffolding Made of steel Use of working platform supported by bracket
shoring They are temporary structures Structures become unsafe due to unsettlement of foundations or removal of adjacent building Shoring is required to prevent movements.
Circumstances when shoring is required Adjascent structures is diamantled Cracks due to unequal settlement of foundation Large openings in walls Poor workmanship
Types of shoring Raking or inclined shores Flying or horizontal shores Dead or vertical shores
Raking shores Consist of wall plate ,needles,cleats,rakers, bracings,sole plate Rakers prevent outward movement of wall Large factor of safety is used for designed of inclined shores Rakers inclined at 45 Sole plate at ground
Flying or horizontal shores Horizontal support to parallel walls Consist of wall plate ,needles,cleats,struts etc Suitable for max distance of about 9m
Dead or vertical shores Needles are supported by vertical members called shores. Used under following circumstances - Lower part of wall is defective - -foundations are deepened - -lower part is to be rebuilt
underpinning Placing of new foundation above existing foundation
Circumstances used for underpinning Building with deep foundations constructed to near building Settlement of existing foundation Basement is to be provided to existing building Existing foundations to be deepened
