Transcript US&R HERS - Central Division

National Urban Search & Rescue Response System
Structural Collapse Technician Training
Structural Collapse Technician
Training – Ver. 3.1
Module : 2b
Constructing
Shoring Systems
Jul12
SCT2b Slide 1
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 2
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 3
National Urban Search & Rescue Response System
Structural Collapse Technician Training
WE INSTALL
RESCUE SHORING
TO PROTECT
"US"
SCT2b Slide 4
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 5
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 6
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Size-up Considerations
 VICTIMS
 SIX SIDED APPROACH
 STRUCTURAL ELEMENTS
 AGE & CONDITON OF STRUCTURE
 COLLAPSE WARNING SIGNS
SCT2b Slide 7
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 8
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shoring Sequence
 Sequence
 Shore from Outside - In
 Shore for Team access & egress
 Phased approach – Class 1, 2 & 3
Spot shore - Class 1
2 Dimensional - Class 2
3 Dimensional - Class 3
T, but Dbl T is better
2 or more Post Vertical
Laced Post, Sloped Floor
SCT2b Slide 9
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Support wood roof & Horizontal Shoring
floor w/ aligned shores in access corridor
SCT2b Slide 10
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shore at Missing
Structural Supports
 Walls
 Beams
 Columns
 Girders
 Arches
SCT2b Slide 11
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The Shoring Squad
SHORING TEAM
CUTTING TEAM
SHORING OFFICER
LAYOUT FF
MEASURING FF
CUTTING FF
SHORING FF
TOOL & EQUIP FF
SCT2b Slide 12
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shore
Assembly Team
SHORING OIC
MEASURING FF
SHORING FF
SHORING FF
SAFETY FF
RUNNER
Cutting
Team
CUTTING TEAM OIC
LAYOUT FF
FEEDER
CUTTING FF
TOOL & EQ FF
RUNNER
SCT2b Slide 13
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shoring Terminology
 Header
Collects load at roof and floor
 Sole Plate
Transmits load to floor or ground
 Wall Plate
Collects load from wall/vert. surface
 Post
Transmits load from header to sole
 Raker
Transmits load from wall plate to sole
 Raker Cleat 24" to 30", 2x used as connection
piece to resist sliding
SCT2b Slide 14
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shoring Terminology (cont)
 Gussets
12" sq. ply connection for rakers
 Half Gusset 6" x 12" ply connection for vert. shores
(Use 2x4x18"cleat if have no Ply)
 Dbl Gusset 12" x 24" Gusset used for Dbl T
Lumber used to connect rakers or
 Mid Pt
posts at mid point for bracing
Brace
 Diagonal 2x lumber placed on diagonal in X or V
to keep shoring from racking
Bracing
Make gussets from (5/8 or 3/4) plywood or OSB
SCT2b Slide 15
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Shoring Terminology (cont)
 Ply Braces
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)
 Window & 2 x 4 x 14" minimum – up to 18"
Door Cleats
 Wedges
2x or 4x lumber cut, diagonally into 2
pieces to allow for adjustments in
height/length (2x are more stable)
 Shims
Any piece of lumber, wedge shaped or
flat that is used to fill-in void spaces
SCT2b Slide 16
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Standard Gusset Plates
Ply is 5/8"or 3/4"
All 8d Nails
(Coated nails
cause less
splitting)
Full Gusset
Half Gusset
12"x 12"Ply
(Rakers & T- Shore)
"5 and 8 in Full
Gusset Plate"
6"x 12"Ply
(All Vertical Shores)
"Only 8 in Half
Gusset Plate"
SCT2b Slide 17
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Special Gusset Plates
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
Ply is 5/8"or 3/4"
All 8d Nails
Double Gusset Brace
12"x 24"Ply
(Dbl T Mid-brace )
2 times 8 –8d
SCT2b Slide 18
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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"
SCT2b Slide 19
National Urban Search & Rescue Response System
Structural Collapse Technician Training
"Marrying"
Wedges
Sloped Surfaces Must Be in Full Contact
1" min.
Full Driven
Best
Over Driven
O.K.
Under Driven
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
SCT2b Slide 20
National Urban Search & Rescue Response System
Structural Collapse Technician Training
5 - Nail Patterns
Standard 5-Nail
8-Nail
11-Nail
14-Nail
SCT2b Slide 21
National Urban Search & Rescue Response System
Structural Collapse Technician Training
2x Nailing
2x6
2x4
SCT2b Slide 22
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 23
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 24
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 25
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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!
SCT2b Slide 26
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The "T" Shore – Class 1
Gusset
Half
Gusset
SCT2b Slide 27
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 28
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The Dbl "T" Shore – Class 2
Double Gusset
each side
Double Gusset
Double Gusset
one side
Half
Gusset
Half
Gusset
Half
Gusset
Half
Gusset
Less than 6 ft High
No Mid Height Ply Gusset
SCT2b Slide 29
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 30
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Vertical Shore
Short Term & Light Load, with no Lateral Displacement
For Light Frame
where no
displacement
due to lateral
loads, vibration
or load shifting
is likely
Half
Gusset
Half
Gusset
SCT2b Slide 31
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Vertical Shore
Fully connected system
Resistant to
displacement
due to lateral
loads, vibration
or load shifting
Half
Gusset
Half
Gusset
Half
Gusset
SCT2b Slide 32
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Diagonal Brace Joint -Ideal Condition
4x4 min Header
(diag. covers post)
12"
Half Gusset far
side if header ht. is
greater than width
2x6 Diag
SCT2b Slide 33
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 34
National Urban Search & Rescue Response System
Structural Collapse Technician Training
2 Post Vertical Shores
Half Gusset
Prefab 2 Posts with Header, Half
Gussets & Lacing if Possible
Half
Gusset
Max = 12ft High
Limit to 6ft High
SCT2b Slide 35
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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.
SCT2b Slide 36
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Laced Post Shore
(6ft to 11 feet high – all Half Gussets)
Half Gusset
Half
Gusset
SCT2b Slide 37
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Laced Post Top Joint
4x4 min Header
(diag. mostly covers post)
12"
Half Gusset far
side if header ht. is
greater than width
2x4 Diag
SCT2b Slide 38
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Laced Post Shore
(over 11 ft high to 17 ft high)
Half Gusset
Half
Gusset
SCT2b Slide 39
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 40
National Urban Search & Rescue Response System
Structural Collapse Technician Training
4'x4' Plywood Laced Post Shore (4x4-PLP)
(9 ft to 13 ft high)
2'-0"
2'-0"
Half Gusset
one side at top
8"x48"ply
24"x48"ply
24"x48"ply
24"x48"ply
24"x48"ply
8"x48"ply
SCT2b Slide 41
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Half Gusset
one side at top
2'-0"
2'-0"
4'x4' Plywood Laced Post Shore (4x4-PLP)
(13 ft to 17 ft high – max height)
SCT2b Slide 42
National Urban Search & Rescue Response System
Structural Collapse Technician Training
2'x4' Plywood Laced Post Shore (2x4-PLP)
(9ft to 13 ft high – max. height)
2'-0"
2'-0"
12"x24" dbl gusset
one side at top
8"x48"ply
24"x24"ply
24"x48"ply
24"x24"ply
24"x48"ply
8"x48"ply
SCT2b Slide 43
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 44
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Sloped Floor Shores
vs. 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
SCT2b Slide 45
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Sloped Floor Shore
Perpendicular method
(add 3-2x6x18" under each
post on soil)
Half Gusset
Type 2
(Type 1 was omitted)
SCT2b Slide 46
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Type 2 Sloped Floor Shore w/o Wedges
SCT2b Slide 47
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Sloped Floor Shore
Friction method
add 2x6 flat under
Sole on Soil)
Half Gusset
Type 3
Wedges are
Optional
SCT2b Slide 48
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Sloped Floor Shore Details
Post Angle and Return Cuts
SCT2b Slide 49
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Slope Floor Lacing
2x6 or 2-2x4
Shores up to 5 ft o.c.
SCT2b Slide 50
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
Shores up to 5 ft o.c.
12" max
SCT2b Slide 51
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Slope Floor X Bracing
2x6 or 2-2x4
Shores 8 ft max. o.c.
SCT2b Slide 52
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The Door Shore
 RESUPPORT
ENTRANCE
 SUPPORT WALL
BREACH
 1 inch THICKNESS
FOR EVERY FOOT
of HEADER LENGTH
SCT2b Slide 53
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The Window Shore
 STABILIZE WINDOW OPENING
 SUPPORT DAMAGED HEADER
 1 inch THICKNESS FOR EVERY
FOOT OF HEADER OPENING
SCT2b Slide 54
National Urban Search & Rescue Response System
Structural Collapse Technician Training
The Window Shore
Construct In-place
Method
Preferred Cleat
(14" minimum)
Alternate Cleat
SCT2b Slide 55
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 56
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Window Shores
Pre-fabricated
Construct In-place
SCT2b Slide 57
National Urban Search & Rescue Response System
Structural Collapse Technician Training
How to Construct Lateral Shores
 Horizontal Shore
 Flying Raker Shore
 Solid Sole Raker Shore
 Split Sole Raker Shore
 Pneumatic Shores
SCT2b Slide 58
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Horizontal Shore
 STABILIZE PASSAGEWAYS
 2 - 3 SUPPORT STRUTS
 DEBRIS WEIGHT WILL DETERMINE
THE SIZE AND NUMBER OF STRUTS
NEEDED
SCT2b Slide 59
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Horizontal Shore
Half
Gusset
Half
Gusset
SCT2b Slide 60
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Horizontal Shore – w/ & w/o X-Brace
SCT2b Slide 61
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 62
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Flying Raker Shore
Always Pre-Construct
600
If wall bulges, raker will
tend to kick up due to
force in bottom brace
Trough Base
SCT2b Slide 63
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Flying Raker in Trough On Conc. Paving
8 ft 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
SCT2b Slide 64
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 65
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Solid Sole Raker – Class 3
Assembly Sequence
See next slide for
Prefab away from wall
(all Full Gussets)
3
5
4
SCT2b Slide 66
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
3
5
4
SCT2b Slide 67
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Solid Sole Raker on Soil w/18" square foot
8 ft insertion point – no mid brace, single X brace
45 deg. Raker
being tested
in Raker
Breaker
CATF-3
SCT2b Slide 68
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 69
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Split Sole Raker – Class 3
May slope sole if rubble falls next to wall
Trough Base
Best choice
SCT2b Slide 70
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Split Sole Raker
w/sloped Bottom Brace & Trough
May be at 45 or 60 degrees – shown at 60 degrees
This would only be
built this way if rubble
was next to wall
SCT2b Slide 71
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Split Sole Raker
w/level Bottom Brace & Trough
May 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
SCT2b Slide 72
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Insertion Point
C
2' ZONE
SCT2b Slide 73
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Effect Of Raker Angle
1k (1000 lb) in Raker
.5k
.87k
.7k
.5k
.7k
.87k
30 Degree
45 Degree
60 Degree
 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
SCT2b Slide 74
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Shore Angles
DEGREE
PITCH
LENGTH
45 deg
12/12
17
60 deg
12/7
14
SCT2b Slide 75
National Urban Search & Rescue Response System
Structural Collapse Technician Training
45 Degrees
4
17
17
17
3
17
2
17
1
1
2
3
4
SCT2b Slide 76
National Urban Search & Rescue Response System
Structural Collapse Technician Training
60 Degrees
4
3
2
1
14
14
14
14
14
7" 14" 21" 28"
SCT2b Slide 77
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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"
Insertion
Point, Ft
Raker
Length
Based on
Insertion
Point
See FOG
& SOG
Sect 3
SCT2b Slide 78
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Cleats – 5-nail Pattern
45 Degree
2"
5"
5"o.c.
2x4x24in, 14-16d
60 Deg
5"
5"
5"o.c.
2x4x30in, 20-16d Top Cleat Only
(Bottom Cleat is same as 24" above)
SCT2b Slide 79
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Gusset Plates – 5/8 or 3/4 ply
All are 12"x 12", 5/8 or 3/4 plywood w/ 8d nails
Raker to
Wall Plate
Raker to
Sole
Wall Plate
to Sole
SCT2b Slide 80
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Flying & Split Sole Raker Base
Picket each side
May be 5/8x36"
Trough Base
see next slide
Add 18"x 18" foot for Split
Sole on Soil (3 -2x6x18" or
2 – 18"x18"x3/4 plywood)
6x6 Sole Anch
2-Pickets at Paving
4-Pickets at Soil
(only 2 pickets at
Flying Raker)
May pre-drill timber
for pickets
2x4 or 4x4 Wedges
SCT2b Slide 81
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Trough Base Detail
For Split-Sole & Flying Raker
2 x 4 x 36" bottom
2 x 6 x 36" ea side
7 –16d ea side
2 x 4 x 18"
5 -16d to bottom
Flush end bearings
SCT2b Slide 82
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Bracing System
Top-Horiz
Rakers
Mid-Horiz
Splice
See next
slide
Bott-Horiz
SCT2b Slide 83
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 84
National Urban Search & Rescue Response System
Structural Collapse Technician Training
X & V Bracing Example – Both Work
SCT2b Slide 85
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Dbl X-bracing for Special Split Sole Raker
Note that Bottom
Braces have been
sloped down to
intersect Raker
near Trough
SCT2b Slide 86
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Double Raker Shore
SCT2b Slide 87
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Dbl Raker
w/Spliced Raker
& Wall Plate
Note that bracing is V
configuration. Same
effect as X, just in
different bays
SCT2b Slide 88
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Splice
5/8 or 3/4 Plywood or 2 x
36"
SCT2b Slide 89
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Raker Splice
2' ZONE
SCT2b Slide 90
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 91
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 92
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Backing for
Rakers
Applies to Flying,
Solid Sole, and
Split Sole Rakers
Top of Backing is
at Insertion Point
SCT2b Slide 93
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Angle Cuts
1 1/2 RETURN CUT
45 DEGREE CUT
SCT2b Slide 94
National Urban Search & Rescue Response System
Structural Collapse Technician Training
SCT2b Slide 95
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
Wedge Set
Sole Plate
6x6
Timber
SCT2b Slide 96
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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)
SCT2b Slide 97
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Best to find a
Concrete Curb or
Wall for Anchor
or
Use 2 Pickets into
Concrete Paving
SCT2b Slide 98
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Mechanical Shores
Ellis Clamps
 MAXIMUM HEIGHT 12'
 MAX HEIGHT BOTTOM
LEG IS 7'
 CLAMPS 12" APART
 MIN 6" FROM TOP
 MIN 6" FROM BOTTOM
SCT2b Slide 99
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 100
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 101
National Urban Search & Rescue Response System
Structural Collapse Technician Training
Cutting Table
4x8 or
4x4 Sheet
¾" Ply
Raise off
Ground
32" – 34"
5 ¾ " 1 ¾" 3 ¾" 3 ½"
gap gap gap space
36" mark
30" mark
24" mark
18" mark
12" mark
SCT2b Slide 102
National Urban Search & Rescue Response System
Structural Collapse Technician Training
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
SCT2b Slide 103