Structural collapse technician training ver 3 1
This presentation is the property of its rightful owner.
Sponsored Links
1 / 103

Structural Collapse Technician Training – Ver. 3.1 PowerPoint PPT Presentation


  • 198 Views
  • Uploaded on
  • Presentation posted in: General

Structural Collapse Technician Training – Ver. 3.1. Module : 2b Constructing Shoring Systems Jul12. Terminal Objectives. The Student shall learn how to maintain the integrity of all structurally unstable elements

Download Presentation

Structural Collapse Technician Training – Ver. 3.1

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Structural collapse technician training ver 3 1

Structural Collapse Technician Training – Ver. 3.1

Module : 2b

Constructing Shoring Systems

Jul12


Terminal objectives

Terminal Objectives

  • The Student shall learn how to maintain the integrity of all structurally unstable elements

  • The Student shall learn how to properly transmit or redirect the collapse loads to stable ground or other suitable structural elements capable of handling the additional loads


Enabling objectives

Enabling Objectives

  • Have a basic understanding of how to conduct a proper shoring size-up

  • Be able to identify locations for proper shoring placement

  • Understand the shoring team concept and identify positions & purpose

  • Understand the different types of shoring components and equipment


We install rescue shoring to protect us

WE INSTALL RESCUE SHORING TO PROTECT"US"


Shoring size up 1

Shoring Size-up - 1

  • Identify structural hazards, damage and potential victim locations

  • Determine best method to mitigate the hazard and damage

  • Determine the type & placement of shoring systems in relation to structural hazards and potential victim location


Shoring size up 2

Shoring Size-up - 2

  • Performed by at least a structural specialist, rescue team manager and / or a rescue squad officer

  • It must be extensive, accurate and continue throughout the rescue operation


Size up considerations

Size-up Considerations

  • VICTIMS

  • SIX SIDED APPROACH

  • STRUCTURAL ELEMENTS

  • AGE & CONDITON OF STRUCTURE

  • COLLAPSE WARNING SIGNS


Structural collapse technician training ver 3 1

Shoring Placement

  • Where to place US&R Shoring

    • Support unstable Structural Elements

    • Under Debris Pile

    • Under Victim Location

Support Fl Beam,

so it can provide lateral support for column


Shoring sequence

Shoring Sequence

  • Sequence

    • Shore from Outside - In

    • Shore for Team access & egress

    • Phased approach – Class 1, 2 & 3

      • Spot shore - Class 1 T, but Dbl T is better

      • 2 Dimensional - Class 2 2 or more Post Vertical

      • 3 Dimensional - Class 3 Laced Post, Sloped Floor


Structural collapse technician training ver 3 1

Support wood roof & floor w/ aligned shores

Horizontal Shoring in access corridor


Shore at missing structural supports

Shore at Missing Structural Supports

  • Walls

  • Beams

  • Columns

  • Girders

  • Arches


The shoring squad

CUTTING TEAM

LAYOUT FF

CUTTING FF

TOOL & EQUIP FF

The Shoring Squad

SHORING TEAM

SHORING OFFICER

MEASURING FF

SHORING FF


Shore cutting assembly team team

SHORING OIC

MEASURING FF

SHORING FF

SHORING FF

SAFETY FF

RUNNER

CUTTING TEAM OIC

LAYOUT FF

FEEDER

CUTTING FF

TOOL & EQ FF

RUNNER

Shore Cutting Assembly Team Team


Shoring terminology

Header

Sole Plate

Wall Plate

Post

Raker

Raker Cleat

Collects load at roof and floor

Transmits load to floor or ground

Collects load from wall/vert. surface

Transmits load from header to sole

Transmits load from wall plate to sole

24" to 30", 2x used as connection piece to resist sliding

Shoring Terminology


Shoring terminology cont

Gussets

Half Gusset

Dbl Gusset

Mid Pt Brace

Diagonal Bracing

12" sq. ply connection for rakers

6" x 12" ply connection for vert. shores

(Use 2x4x18"cleat if have noPly)

12" x 24" Gusset used for Dbl T

Lumber used to connect rakers or

posts at mid point for bracing

2x lumber placed on diagonal in X or V to keep shoring from racking

Shoring Terminology (cont)

Make gussets from (5/8 or 3/4) plywood or OSB


Shoring terminology cont1

Ply Braces

Window & Door Cleats

Wedges

Shims

5/8" or 3/4" plywood cut in strips of 8" x 48", 24" x 48", & 24" x 24", used to brace Plywood Laced Posts (PLP)

2 x 4 x 14" minimum – up to 18"

2x or 4x lumber cut, diagonally into 2 pieces to allow for adjustments in height/length (2x are more stable)

Any piece of lumber, wedge shaped or flat that is used to fill-in void spaces

Shoring Terminology (cont)


Standard gusset plates

Standard Gusset Plates

Ply is 5/8"or 3/4"

All 8d Nails

(Coated nails cause less splitting)

Full Gusset

12"x 12"Ply

(Rakers & T- Shore)

"5 and 8 in Full Gusset Plate"

Half Gusset6"x 12"Ply

(All Vertical Shores)

"Only 8 in Half Gusset Plate"


Special gusset plates

Special Gusset Plates

Ply is 5/8"or 3/4"

All 8d Nails

Ply is 5/8"or 3/4"

All 8d Nails

Double Gusset at Header

12"x 24"Ply

(Dbl T & Ply Laced Post )

14-8d + 2 times 5 –8d

Double Gusset Brace

12"x 24"Ply

(Dbl T Mid-brace )

2 times 8 –8d


Plyw d braces ply laced posts plp

Plyw'd Braces – Ply Laced Posts (PLP)

Top & Bottom Brace

8"x 48" for 4ft sides of 2'x4' & 4'x4' PLP

5 –8d each end

Middle Braces

24"x 48" for 4ft sides of 2'x4' & 4'x4' PLP

24"x24" for 2ft side of 2'x4' PLP

11- 8d each end (2 - 5 pattern + 1)

All Plywood may be 5/8"or 3/4"


Marrying wedges sloped surfaces must be in full contact

"Marrying" WedgesSloped Surfaces Must Be in Full Contact

1" min.

Full Driven Over Driven Under Driven

Best O.K. Wrong

What if one wedge is upside down?

This is NOT RECOMMENDED. It is better to have the cut surfaces together – more friction & better fit


5 nail patterns

5 - Nail Patterns

Standard 5-Nail

8-Nail

11-Nail

14-Nail


2x nailing

2x Nailing

2x6 2x4


Use of gusset plates in vertical shoring

Use of Gusset Plates in Vertical Shoring

  • Gussets are placed on one side at post to header for 4x4 & 6x6 headers at the inner posts

    • At the end posts, the 2x6 diagonal on one side replaces the need for a gusset plate

  • When headers are deeper than 4", gussets are needed both sides to prevent header roll-over

  • Gussets should be used on both sides of posts at sole, in order to keep wedges in place

    • For wood floor/roof support, 1-sided connections may be used, where displacement of shore caused by lateral loads, vibrations, or shifting is unlikely

  • Gussets may be made from 5/8"or 3/4"plywood

    • OSB of same thickness may also be used


Shoring nails repeated from previous

Shoring Nails – Repeated from previous

  • For best results, nails should not split the wood

    • Use Pasload &/or Senco Nail Guns & Palm Nailers

    • 16d common duplex may only be used in training

  • Recommended Nails

    • For Plywood – 8d Common, Coated (.131 x 2.5")

    • For 2x – 16d Sinkers/Coolers (.148 x 3.25 coated)

      (same as 12d common nails)

    • If only have 16d Box nails (.135 x 3.5) – O.K. except add 3-nails in raker cleats

  • Nail Heads for Nail Guns

    • Full (offset) heads are preferred

    • Clip Headed nail are OK for 2x and 5/8", 3/4" Ply

    • V-cut heads are least desirable – Not Recommended


How to construct vertical shores

How to construct Vertical Shores

  • T-shore

  • Dbl-T shore

  • Vertical Shore

  • Laced Post Shore (LP)

  • Plywood Laced Post Shores (PLP)

  • Sloped Floor Shores

  • Window & Door Shores


The t shore

The " T" Shore

  • INITIAL SAFETY SHORE

  • STANDARD " T "

  • TEMPORARY SHORING

  • TYPICAL HEADER LENGTH = 36"

  • TYPICAL SOLE LENGTH = 24" to 36"

    • (typical same as header, can be 24" on slab)

  • MAXIMUM HEIGHT IS 11 ft

  • Load must be centered on the post or it is UNSTABLE!


Structural collapse technician training ver 3 1

Gusset

Half Gusset

The "T" Shore – Class 1


The double t shore

The Double " T" Shore

  • INITIAL SAFETY SHORE

  • DOUBLE " T "

  • TEMPORARY SHORING

  • HEADER LENGTH = 36"

  • MIN. SOLE LENGTH = 36"

  • POSTS 18" to 24" out to out

  • Much more stable than "T"

  • Maximum height is 12 ft


Structural collapse technician training ver 3 1

Double Gusset

Half Gusset

Half Gusset

Less than 6 ft High

No Mid Height Ply Gusset

Half Gusset

Half Gusset

The Dbl "T" Shore – Class 2

Double Gusset each side

Double Gusset one side


Vertical shore class 2

Vertical Shore – Class 2

  • SUPPORT UNSTABLE FLOORS or ROOFS

  • POSTS UNDER FLOOR BEAMS

  • MID-POINT BRACING > 9 ft Ceiling Height (Posts over 8ft plus header & sole)

  • 3 post type is shown – may be more posts

  • (2 post type shown following this)

  • Maximum slope is 6" in 10 ft


Vertical shore short term light load with no lateral displacement

Half Gusset

Half Gusset

Vertical ShoreShort Term & Light Load, with no Lateral Displacement

For Light Frame where no displacement due to lateral loads, vibration or load shifting is likely


Vertical shore fully connected system

Half Gusset

Half Gusset

Half Gusset

Vertical Shore Fully connected system

Resistant to displacement due to lateral loads, vibration or load shifting


Diagonal brace joint ideal condition

Diagonal Brace Joint -Ideal Condition

4x4 min Header

(diag. covers post)

Half Gusset far side if header ht. is greater than width

12"

2x6 Diag


2 post vertical shore class 2

2 Post Vertical Shore – Class 2

  • FASTER to BUILD THAN 3 or 4 POST

  • SAME AS ONE SIDE OF LACED POST

  • (Can later convert a pair into a Laced Post)

  • USE LACING or X BRACING

  • Lacing must be 7'-6" max long so it can resist Tension & Compression

  • POSTS are 4ft Max. o.c. for 4x4 (5ft for 6x6)

  • Header is 1" min deep for each 1ft Span


2 post vertical shores

Half Gusset

Half Gusset

Limit to 6ft High

2 Post Vertical Shores

Prefab 2 Posts with Header, Half Gussets & Lacing if Possible

Max = 12ft High


Laced post shore class 3

Laced Post Shore – Class 3

  • STRONGEST, MOST STABLE SHORE WE BUILD.

  • CAN BE UTILIZED AS A SAFE HAVEN AREA.

  • USE 4x4 & 6x6 POSTS

    • 4ft max. spacing for 4x4, and 5ft max for 6x6

    • Spacing should be out to out

  • ONE MID BRACE FROM 6' to 11' HIGH

    • 2 mid braces from 11' to 17'

    • 3 mid braces from 17' to 20' (6x6 post systems only)

  • NO MID POINT BRACE IF UNDER 6' HIGH

  • 2x4 DIAGONAL BRACES, 3-16d ea. end for 4x4.

    • 2x6 diagonal braces, 5-16d each end for 6x6.


Laced post shore 6ft to 11 feet high all half gussets

Half Gusset

Half Gusset

Laced Post Shore(6ft to 11 feet high – all Half Gussets)


Laced post top joint

Laced Post Top Joint

4x4 min Header

(diag. mostly covers post)

Half Gusset far side if header ht. is greater than width

12"

2x4 Diag


Laced post shore over 11 ft high to 17 ft high

Half Gusset

Half Gusset

Laced Post Shore(over 11 ft high to 17 ft high)


Plywood laced post shore plp

Plywood Laced Post Shore (PLP)

  • CLASS 3 & SIMILAR to STD LACED POST

    • LIGHTER & FASTER TO BUILD

  • CAN BE UTILIZED as a SAFE HAVEN AREA

  • POSTS ARE SPACED 4'x4' or 2'x4' out to out USING 4x4's & 6x6's (usually 4x4s)

  • HAVE 2 or 3 LEVELS of PLY'WD BRACES

    • USE 3 LEVELS for HEIGHTS OVER 13'

  • MAX. HT. for 4'x4' = 17'; for 2'x4' = 13'

    • MINIMUM HT is 4', but not practical less than 9ft


4 x4 plywood laced post shore 4x4 plp 9 ft to 13 ft high

4'x4' Plywood Laced Post Shore (4x4-PLP)(9 ft to 13 ft high)

Half Gusset

one side at top

8"x48"ply

2'-0"

24"x48"ply

24"x48"ply

24"x48"ply

24"x48"ply

8"x48"ply

2'-0"


Structural collapse technician training ver 3 1

4'x4' Plywood Laced Post Shore (4x4-PLP)(13 ft to 17 ft high – max height)

Half Gusset

one side at top

2'-0"

2'-0"


2 x4 plywood laced post shore 2x4 plp 9ft to 13 ft high max height

2'x4' Plywood Laced Post Shore (2x4-PLP)(9ft to 13 ft high – max. height)

12"x24" dbl gusset

one side at top

8"x48"ply

2'-0"

24"x48"ply

24"x24"ply

24"x48"ply

24"x24"ply

8"x48"ply

2'-0"


Sloped floor shore class 3

Sloped Floor Shore – Class 3

  • Must be erected in pairs and cross braced Post spacing is 4ft max. 4x4 (5ft max. for 6x6)

  • Space shores from 5ft to 8ft apart for 5 ft spacing, cross brace like Laced Posts, more than 5ft, cross brace same as for Raker Shores

  • Erect Posts "Perpendicular" to the floor, where concrete floors remain attached (Type 2)

  • Erect Posts Vertical as "Friction System" where floor is not attached, and/or prevented from sliding (Type 3)

  • Use 2 - 1/2" Pins, (min.) as anchors to concrete

  • Use 2 - 1" Pins, (min.) as anchors to soil


Sloped floor shores vs box cribbing

Sloped Floor Shoresvs. Box Cribbing

  • Cribbing should be used only if Slope of Floor is less than 30% (3 ft in 10 ft, or approx. 15 degrees)

    and

  • If Max. Height of Shore is 4 ft or less


Structural collapse technician training ver 3 1

Half Gusset

Sloped Floor Shore

Perpendicular method

(add 3-2x6x18" under each

post on soil)

Type 2

(Type 1 was omitted)


Type 2 sloped floor shore w o wedges

Type 2 Sloped Floor Shore w/o Wedges


Sloped floor shore friction method add 2x6 flat under sole on soil

Half Gusset

Wedges are Optional

Sloped Floor ShoreFriction methodadd 2x6 flat under Sole on Soil)

Type 3


Sloped floor shore details post angle and return cuts

Sloped Floor Shore DetailsPost Angle and Return Cuts


Slope floor lacing

2x6 or 2-2x4

Slope Floor Lacing

Shores up to 5 ft o.c.


Slope floor brace when too short for lacing

12" max

12" to 24"- 5/8"or 3/4" plywood strip

2 rows 8d @ 3" o.c. to posts

12" max

Slope Floor BraceWhen too short for lacing

Shores up to 5 ft o.c.


Slope floor x bracing

2x6 or 2-2x4

Slope Floor X Bracing

Shores 8 ft max. o.c.


The door shore

The Door Shore

  • RESUPPORT ENTRANCE

  • SUPPORT WALL BREACH

  • 1 inch THICKNESS FOR EVERY FOOT of HEADER LENGTH


The window shore

The Window Shore

  • STABILIZE WINDOW OPENING

  • SUPPORT DAMAGED HEADER

  • 1 inch THICKNESS FOR EVERY FOOT OF HEADER OPENING


Structural collapse technician training ver 3 1

Preferred Cleat

(14" minimum)

Alternate Cleat

The Window Shore

Construct In-place

Method


Structural collapse technician training ver 3 1

The Window Shore

Pre-constructed Method

Build frame with plywood

gussets at each corner, 1 ½" less than opening each way.

Insert in opening, then add

Wedges at side and bottom


Structural collapse technician training ver 3 1

Window Shores

Pre-fabricated

Construct In-place


How to construct lateral shores

How to Construct Lateral Shores

  • Horizontal Shore

  • Flying Raker Shore

  • Solid Sole Raker Shore

  • Split Sole Raker Shore

  • Pneumatic Shores


Horizontal shore

Horizontal Shore

  • STABILIZE PASSAGEWAYS

  • 2 - 3 SUPPORT STRUTS

  • DEBRIS WEIGHT WILL DETERMINE THE SIZE AND NUMBER OF STRUTS NEEDED


Structural collapse technician training ver 3 1

Half Gusset

Half Gusset

Horizontal Shore


Structural collapse technician training ver 3 1

Horizontal Shore – w/ & w/o X-Brace


Flying raker shore spot shore

Flying Raker Shore – Spot Shore

  • AN INITIAL SAFETY RAKER SHORE

  • MUST BE ANCHORED TO THE WALL TO WORK PROPERLY

  • NOT A PERMANENT SYSTEM!

  • USE TROUGH BASE - CAN BE REUSED

  • Use 6ft Wall Plate w/24"cleat & 60 deg Raker

  • Design Strength is about 1000 lb


Flying raker shore always pre construct

If wall bulges, raker will tend to kick up due to force in bottom brace

600

Trough Base

Flying Raker ShoreAlways Pre-Construct


Flying raker in trough on conc paving 8 ft insertion point 6ft wall plate 24 cleat 60 0 angle

Flying Raker in Trough On Conc. Paving8ft insertion point, 6ft wall plate, 24" cleat & 600 angle)

Need plywood backing if wall is badly cracked, or at wood walls

At wood walls nail 10-16d into solid blocking at floor line joist


Solid sole raker class 3

Solid Sole Raker – Class 3

  • The Raker Shore of Choice

  • Generally erected at 45 degree angle (60 deg O.K.)

  • Can be utilized on Soil as well as Pavement

    • Add 18" x 18" foot under raker/sole intersection on soil

  • Pre-assemble and carry into position

  • Must erect minimum of two shores

  • Used to re-support unstable or leaning walls

  • Design Strength is 2,500 lb each, 5,000 lb pair


Solid sole raker class 31

5

3

4

Solid Sole Raker – Class 3

Assembly Sequence

See next slide for Prefab away from wall

(all Full Gussets)


Solid sole raker class 32

5

3

4

Solid Sole Raker – Class 3

Prefab away from wall if Possible – May need to adjust Sole Cleat after move to wall

18"x18" foot at Soil


Solid sole raker on soil w 18 square foot 8 ft insertion point no mid brace single x brace

Solid Sole Raker on Soil w/18" square foot8 ft insertion point – no mid brace, single X brace

45 deg. Raker being tested in Raker Breaker

CATF-3


Split sole raker class 3

Split Sole Raker – Class 3

  • Second option for Raker Shoring

  • Generally utilized on soil or where debris are at the base of the wall

  • Similar to Solid Sole, except Sole & Foot /Anchor

    • Use Trough Base (w/ 18"x18" foot if on soil)

    • Should be mostly pre-fabricated

  • May be built at 60 or 45 degree angle

  • Design Strength is 2,500lb each, 5,000lb pair


Split sole raker class 3 may slope sole if rubble falls next to wall

Split Sole Raker – Class 3May slope sole if rubble falls next to wall

Trough Base

Best choice


Split sole raker w sloped bottom brace trough may be at 45 or 60 degrees shown at 60 degrees

Split Sole Raker w/sloped Bottom Brace & TroughMay be at 45 or 60 degrees – shown at 60 degrees

This would only be built this way if rubble was next to wall


Split sole raker w level bottom brace trough may be at 45 or 60 degrees shown at 60 degrees

Split Sole Raker w/level Bottom Brace & TroughMay be at 45 or 60 degrees – shown at 60 degrees

If no rubble was next to wall, wall plate may bear on ground or pavement if easier


Insertion point

Insertion Point

C

2' ZONE


Effect of raker angle 1k 1000 lb in raker

30 Degree

45 Degree

60 Degree

Effect Of Raker Angle1k (1000 lb) in Raker

.87k

.5k

.5k

.7k

  • Approximate Horizontal Design Capacity of Rakers

    • Full Triangle Rakers is about 2.5 k

      • Based on Cleat Nailing + Friction

    • Flying Raker is about 1k

      • For 4 x 4 Raker, due to compression plus bending

.7k

.87k


Raker shore angles

Raker Shore Angles

DEGREE PITCH LENGTH

45 deg12/1217

60 deg 12/714


45 degrees

17

17

17

17

17

45 Degrees

4

3

2

1

1

2

3

4


60 degrees

14

14

14

14

14

60 Degrees

4

3

2

1

7"

14"

21"

28"


Raker length based on insertion point

Insertion Point, Ft

45o Raker L

Inches / Feet

60 o Raker L

Inches / Feet

60 o Horiz. Dist.

Inches / Feet

3

51" / 4'- 3"

42" / 3'- 6"

21" / 1'-9"

4

68" / 5'- 8"

56" / 4'- 8"

28" / 2'-4"

5

85" / 7'-1"

70" / 5'- 10"

35" / 2'-11"

6

102" / 8'- 6"

84" / 7'- 0"

42" / 3'-6"

7

119" / 9'- 11"

98" / 8'- 2"

49" / 4'-1"

8

136" / 11'- 4"

112" / 9'- 4"

56" / 4'-8"

9

153" / 12'- 9"

126" / 10'- 6"

63" / 5'-3"

10

170" / 14'- 2"

140" / 11'- 8"

70" / 5'-10"

11

187" / 15'- 7"

154" / 12'- 10"

77"/ 6'-5"

12

204" / 17'- 0"

168" / 14'- 0"

84"/ 7'-0"

13

221" / 18'- 5"

182" / 15'- 2"

91" / 7'-7"

14

238" / 19'- 10"

196/ 16'- 4"

98" /8'-2"

15

255" / 21'- 3"

210" / 17'- 6"

105"/ 8'-9"

16

272" / 22'- 8"

224" / 18'- 8"

112"/ 9'-4"

17

289" / 24'- 1"

238" / 19'- 10"

119"/ 9'-11"

18

306" / 25'- 6"

252" / 21'- 0"

126"/ 10'-6"

19

323" / 26'- 11"

266" / 22'- 2"

133"/ 11'-1"

20

340"/ 28'- 4"

280" / 23'- 4"

140"/ 11'-8"

Raker Length Based on Insertion Point

See FOG & SOG Sect 3


Raker cleats 5 nail pattern

Raker Cleats – 5-nail Pattern

45 Degree

2"

5"o.c.

5"

2x4x24in, 14-16d

60 Deg

5"

5"o.c.

5"

2x4x30in, 20-16d Top Cleat Only

(Bottom Cleat is same as 24" above)


Raker gusset plates 5 8 or 3 4 ply all are 12 x 12 5 8 or 3 4 plywood w 8d nails

Raker Gusset Plates – 5/8 or 3/4 plyAll are 12"x 12", 5/8 or 3/4 plywood w/ 8d nails

Raker to Wall Plate

Raker to Sole

Wall Plate to Sole


Flying split sole raker base

Flying & Split Sole Raker Base

Add 18"x 18" foot for Split Sole on Soil (3 -2x6x18" or 2 – 18"x18"x3/4 plywood)

Picket each side

May be 5/8x36"

6x6 Sole Anch

2-Pickets at Paving

4-Pickets at Soil

(only 2 pickets at Flying Raker)

May pre-drill timber for pickets

Trough Base

see next slide

2x4 or 4x4 Wedges


Trough base detail for split sole flying raker

Trough Base Detail For Split-Sole & Flying Raker

2 x 4 x 18"

5 -16d to bottom

2 x 4 x 36" bottom

2 x 6 x 36" ea side

7 –16d ea side Flush end bearings


Raker bracing system

Raker Bracing System

Top-Horiz

Rakers

Mid-Horiz

Splice

See next slide

Bott-Horiz


Horizontal brace splice

Horizontal Brace Splice

Butt Splice at center of Raker

3 - 16d ea 2x6 Under Gusset

6"x 12" Half-Gusset

4- 8d each end, take care

to not nail over, 16d nails


X v bracing example both work

X & V Bracing Example – Both Work


Dbl x bracing for special split sole raker

Dbl X-bracing for Special Split Sole Raker

Note that Bottom Braces have been sloped down to intersect Raker near Trough


Double raker shore

Double Raker Shore


Structural collapse technician training ver 3 1

Dbl Raker w/Spliced Raker & Wall PlateNote that bracing is V configuration. Same effect as X, just in different bays


Raker splice

Raker Splice

5/8 or 3/4 Plywood or 2 x

36"


Structural collapse technician training ver 3 1

Raker Splice

2' ZONE


Backing for rakers at wall plate

Backing for Rakers at Wall Plate

  • Backing may be 5/8" or 3/4" plywood (or 2 layers of 1/2" plywood)

    • Nail backing to wall plate with 16-16d nails

    • See later details for connection to walls

  • Backing for badly cracked Concrete or URM Walls

    • Use 4ft x 4ft ply. (or 4ft x 8ft if needed) to spread-out the raker supporting effect

  • Backing used for Wood Walls

    • Use 2ft high x 3ft wide ply. to connect to studs

      (or 4ft x 4ft if needed)

    • Center Wall Plate on a stud


Backing for rakers at sole

Backing for Rakers at Sole

  • Backing is normally not needed under Sole bearing on Concrete or Paving.

  • The previously shown 18"x 18" Foot should be added under the Sole and Trough when bearing is on soil


Structural collapse technician training ver 3 1

Backing for RakersApplies to Flying, Solid Sole, and Split Sole RakersTop of Backing is at Insertion Point


Angle cuts

Angle Cuts

1 1/2 RETURN CUT

45 DEGREE CUT


Sole anchoring systems

Sole Plate

Sole Anchoring Systems

Min (2) 1"x 48" Steel Pickets in Paving

& (4) 1"x 48" Steel Pickets into Soil

(only 2 pickets at Flying Raker)

May pre-drill timber for 2-pickets

especially following earthquakes

6x6

Timber

Wedge Set


Use 4 wedge anch into concrete

Raker Sole, Steel Anchors

Use 4 - ½" Wedge Anch. into concrete

Use at least

4 - 1"dia Steel Pickets

to anchor one Raker into soil

(except 2 pickets O.K. at Flying Raker)


Structural collapse technician training ver 3 1

Best to find a Concrete Curb or Wall for Anchor

or

Use 2 Pickets into Concrete Paving


Mechanical shores ellis clamps

Mechanical ShoresEllis Clamps

  • MAXIMUM HEIGHT 12'

  • MAX HEIGHT BOTTOM LEG IS 7'

  • CLAMPS 12" APART

  • MIN 6" FROM TOP

  • MIN 6" FROM BOTTOM


Mechanical shores pipe shores trench jacks

Mechanical Shores Pipe Shores & Trench Jacks

  • SEVERAL TYPES, ADJUSTABLE

  • PIN ANCHOR & SCREW ARE THE MOST COMMON

  • 1 1/2 " & 2'' ARE THE NORM

  • MIN IS SCHEDULE 40

  • CAPACITY IS BASED ON L/D RATIO


Pneumatic shores

Pneumatic Shores

  • AIRCRAFT ALUMINUM

  • 18" EXTENDING TO 16'

  • MAY USE UP TO 50PSI AIR TO RAISE THESE STRUTS IN STRUCTURAL COLLAPSE

    • BUT HAND TIGHTENED, SNUG TIGHT

  • WORKING LOAD VARIES

    • DEPENDING ON LENGTH


Structural collapse technician training ver 3 1

3 ¾"

gap

3 ½"

space

1 ¾"

gap

5 ¾ "

gap

Cutting Table

4x8 or

4x4 Sheet

¾" Ply

Raise off Ground

32" – 34"

36" mark

30" mark

24" mark

18" mark

12" mark


Enabling objectives summary

Enabling Objectives Summary

  • Have a basic understanding of how to conduct a proper shoring size-up

  • Be able to identify locations for proper shoring placement

  • Understand the shoring team concept and identify positions & purpose

  • Understand the different types of shoring components and equipment


  • Login