HTT Design-Build Teams - NA 3.11 lt
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Transcript of HTT Design-Build Teams - NA 3.11 lt
• The Shear Tabs
bond to the concrete
• Composite Panels
are fabricated utilizing
bonded Concrete &
Steel
• Load Bearing Wall System
• Shear Wall
• Non – Load Bearing Cladding
System
• Floor or Roof Framing System
• Concrete Fascia transfers out of
plane lateral forces to studs via
concrete bonding to shear tabs
• Studs transfer force to diaphragms
at foundation via track
• Stud & Track Flange punched on 1 side or 2 sides
at approximately 6 inches on center
• Shear Tabs behave as embedded “J Bolts” or
“Nelson Studs” in standard concrete applications
• The calculated strength of the tabs is from latest
American Iron & Steel Institute (AISI) standards for
shear, tension & shear rupture capacities
• Composite strength of HTT Systems is established
through transformed section properties, governed by
stud & track size & gage, thickness & strength of
concrete
• Single Concrete
Wythe – Vertical
loads carried by the
heavy gage studs to the
foundation. Exterior
concrete fascia
combined with interior
sheathing or strapping
braces the flanges in the
weak direction.
• Concrete Wythe both
Sides – Vertical
loads carried by
composite section to the
foundation + added
insulation value.
• Cast Concrete Columns &
Beams - Integrally cast in
concrete columns and beams within
the wall resolve concentrated loads
where necessary in either single
wythe or 2 wythe panels.
4, 6, 8 inch
HTT Studs
Punched
on both
Flanges
2 in Bottom
Face
Concrete Pour
Thermal Block
Coating Option
applied to HTT
Studs for > R Value
Rigid Insulation
placed between
studs
2 inch Concrete
Topping Slab
poured
Omit Insulation for
Solid Concrete
Bottom Concrete
Top
Concrete
HTT Stud & Track
Rigid
Insulation
in Stud
Cavities
Block Out for
Drilled Anchor
to Foundation
Block Out for Panel to
Panel Weld Plate
• Exterior concrete Wythe
acts as a Vertical
Diaphragm to resolve
Lateral Shear Forces
• Standard 5” x ½” Quick
Bolts anchor panels to the
foundation.
• Supplemental Tie-down
Anchors to the foundation
at the end of a wall or
panel resolve Uplift and
Overturning Forces
• HTT Panels weld to steel
structural beams & columns
• Speed of erection
coordinates with structural steel
or concrete frame erection
• Heavy Gage studs can be
welded directly or by clip
angles
• Horizontal HTT
Cee Joists either
single or double
members at 61 cm
spacing
• Panels provide
cee joists &
concrete floor in
one erected
assembly
• Cold formed
gage cees have
increased strength
to resist gravity
loads due to
stiffened
compression flange
• HTT 16 ga. or 14 ga. Double Cee Joists welded together back to back form small steel structural beams
• Blocking & form material is used to pour 2.5 inch thickness
of concrete
• Panels can be poured on or off site
• 6, 8 or 10 inch x 16 ga. or 14 ga. Cee Joists based on
design load & span
• Panels are erected and braced utilizing lugs in cast-in
inserts placed in thickened concrete sections of the panel
• Insert Hardware locations & sizes are custom
engineered to minimize stresses during panel lifting
• Panels can be erected in 48 hours after pour
• Before final assembly of all structural components,
HTT Panels are braced to the floor slab with pipe
braces connected to insert hardware anchored in
thickened concrete sections of the HTT panel
Pipe Braces
• Site Cast Hi-Tech Tilt (HTT) Panels for site
erection in 48 hours
• Precast HTT Panels at a Plant or Offsite for
delivery to the project
• Modular HTT Panel Unit fabrication in a Plant for
delivery to the project
• All applications reduce time and costs
• Power Wash Wall
Surface to Remove
Bond Breaker
• Install Backer Rod +
Joint Sealant in Joints
• Apply Primer – Roller
or Spray
• Apply Finish Color
Coats – Elastomeric
Coating - (External
Vapor & Moisture
Barrier)
• Option for Emissive
Coating
• Plaster 2 – 3 Coats + Finish Coat(s) Requires Multiple
Scaffold Modifications & Changes
• Cement Materials must be Handled up the Scaffold
Typical Wood
Perimeter & Opening
Forms on Concrete
Slab or Casting Bed
w/ Quality Finish
Prep, Bond Breaker
& WWM Reinforcement
HTT Framing -
Track, Studs,
Lift Hardware
& Openings
• Electrical Conduits
• Plumbing Risers
• Communications
• Fire Cabling & Conduit
• Blocking for Hardware
• Blocking for Accessories
• Insulation Materials
• Interior Finish Options
3 Story 41,000 SF
Shell Bldg. for
Professional
Office w/ 7,000 SF
Finished
Common Area
completed in
9 months
4 Story 120,000 SF Climate Controlled Storage
Building w/ Metal Panel interior walls
completed in 5 months
• Shear Tab – The deformed projecting segment punched
from the structural framing member that bonds to the
poured concrete.
• Composite Panel – The completed HTT panel with
concrete face(s) bonded to the structural framing
members in a dimensional vertical or horizontal panel.
• Load Bearing – Carrying the major structural loads for the
structure.
• Cladding – Panels acting as a non-load bearing panel
that completes all or portions of the building envelope.
• Concrete Fascia – The minimum 2 inch poured concrete
segment of the composite panel on either external or
internal face of the HTT Panel.
• Stud – The structural framing member spaced at 24 in
that typically carries vertical loads in the wall panels.5
• Track – The top & bottom structural framing member that
the studs fit into that completes the perimeter panel frame.
Studs are screwed into the track.
• J Bolts – Steel Bolts with a J on the end that embeds into
concrete to connect future materials to cured concrete.
• Nelson Studs – Smooth steel dowels with an enlarged
head in various diameters & lengths that weld to steel
beams, plates & angles for structural bonding to cured
concrete.
• Concrete Face Thickness – Typical thickness = 2 inch;
Heavier Commercial or Military Structural requirements =
2.5 inch.
• Concrete Wythe – a continuous plane of a specified
thickness of concrete material.
• Concentrated Loads – Beam or Girder end reaction
loads (dead + live) that bear on a panel or column within
the panel at a single point, causing larger than normal
structural stresses.6
• Rigid Insulation – Formed Insulation boards of various
types in dimensional sheets that fits into the cavity
between the studs in a HTT Panel. R- Values vary from 3.5
to 5.3 per 1 inch thickness.
• Thermal Block Coating – a specialized coating that
bonds to the HTT framing members and allows the
concrete to maintain its physical bond to the members.
This coating reduces the thermal conductivity of the steel
framing members within the HTT Panel.
• Diaphragm – a horizontal or vertical structural element
that acts like a giant beam or plate spanning between
horizontal or vertical stabilizing elements.
• Supplemental Tie-down Anchors – Specially designed
supplemental components that are connected to critical
framing members at specified locations to increase
resistance to uplift, overturning or seismic forces.
• Cee Joists – the structural framing members that have
identical cross sectional shape as studs, but that act as a
horizontal framing member rather than a vertical stud.7
• Assembly – a segment of building composed of erected
panels for walls, walls & floor(s), or walls, floors & roof.
• Cold Formed – structural members that are roll formed
from coil steel of various thicknesses into different cross
sectional shapes with specified structural properties.
• Gage or Gauge – material thickness in cross section
• Compression Flange – the side of the structural member
that is being “shortened” in resisting the applied loads.
• Single Cee Joist – the framing member acts alone as a
horizontal joist.
• Double Cee Joists – the horizontal HTT framing members
are placed back to back & welded together to form a
unified horizontal joist.
• Erection – the action of lifting, stabilizing and anchoring
panels in position to function as a panelized structural
segment.
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• Lift or Brace Inserts – Specialized hardware designed to
be cast into a concrete tilt-up panel to function as a
connector cast into the HTT Panel for specially designed
lifting or bracing devices.
• Pipe Braces – Specially designed pipes with a foot
device at the concrete slab and a swivel connection
device at the panel insert. Braces engineered by pipe
weight & diameter to resist various loads during the
temporary loading conditions.
• Site Cast – HTT Panels that are cast at the project site,
either on the concrete floor slab or temporary casting
beds.
• Precast – HTT Panels that are cast remotely from the
project site and transported to the project.
• Modular Fabrication – Precast HTT Panels assembled into
a structural unit with a floor, walls and a roof. Modular
units can have various degrees of interior and exterior
completion as a part of the project design.
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• Power Wash – the process of utilizing a high pressure
sprayer to clean the panel surface of the bond breaker
materials, debris, dirt and cementitious residues.
• Bond Breaker – the chemical material that is spray
applied to the pour surface of the slab or casting bed to
prevent concrete bonding to the pour surface, allowing
the panel to be freely lifted.
• Backer Rod – a closed cell foam rod used to fill the
joints between panels as a baker to the sealant installed
in the joint. Backer rod diameter is oversized 30 – 50%
larger than the joint, then wedged & recessed into the
joint.
• Primer – the first surface coating applied directly to the
concrete surface of the panel.
• Elastomeric Coating – a pigmented (for color) coating
material that has flexure properties that allow for
coverage of small cracks and minor panel movement.
This coating also acts as a moisture & vapor barrier.
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• Emissive Coating – an applied coating with the
capability of re-radiating a percentage of energy into the
atmosphere rather than absorbing 100% of that energy.
• Forms – perimeter materials (typically wood) to establish
the dimensions of the HTT Panels and window or door
openings.
• Reinforcement – typical HTT Panel reinforcement is
welded wire mesh (wwm) in flat sheets varying from
6 x 6 W 1.4/1.4, 6 x 6 W 2.1/2.1 to 6 x 6 W 2.9/2.9
• Float Finish – a rough leveling concrete finish with a float
trowel, rather than a finishing trowel.
• Concrete Vibrator – a device used during the concrete
pouring process to vibrate and consolidate the wet
concrete to remove voids provide uniform finishes.
• Spreader Bars – Steel beam assemblies connected to
the crane hook allowing for multiple cable connections,
allowing the panel to pivot from horizontal to vertical.
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• Accent Panel – a specially designed panel, typically
perpendicular to the main wall, acting as a structural
design element creating an accent at an entry or other
architectural opening.
• Thin Brick – application of brick design on the casting
surface of the HTT Panel prior to the installation of
reinforcing and HTT track and studs. Concrete is poured
into the form, bonding the HTT framing materials and the
brick materials into a panel. Actual brick dimensions vary
from 2-1/4 in x 7-5/8 in x 9/16 in; 3-5/8 in x 7-5/8 in x 9/16 in
to 3-5/8 in x 11-5/8 in x 9/16 in.
• Form Liners – preformed plastic or latex sheets
configured to create the texture of various more labor
intensive construction materials. Common liners replicate
stone, wood, or dimpled shapes.
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