3. BlueScope
Manufacturing and VP
Service Centers
AB
SK
MB ON
QC
NB
WA
ME
MT ND
OR VT
MN
NH
ID NY
SD MA
WI
MI CT
WY
Evansville
NJ
IA PA Annville
CA NV NE
OH MD
Turlock St. Joseph IL
IN DE
UT
CO
BlueScope Buildings
WV
NA – Headquarters
VA
KS MO Kansas City, MO
KY
Greensboro
Greensboro
Visalia
Jackson NC
TN Laurinburg
OK
AZ Memphis
NM AR
SC
SC
SC
SC
Pine Bluff
Rainsville
AL
MS
GA
TX
LA
San Marcos
BlueScope Buildings
Manufacturing
Facility
FL
Sales & Engineering
Monterrey, MX Office
Scale Legend
Mile(s) VP Headquarters
0 200 400
4. Service Centers / Sales Regions
Northern
West
Central Eastern
12/9/10
22. Primary
Frames
Carry loads to the foundation
Shop Coat is 1 mil thick and
gray* in color (bronze and red
oxide also available at additional
cost).
Spans and Eave Heights in
increments of 1/16”
* as of VPCommand v8.0 February 14, 2010
VP University
23. Bolts
• All Structural Connections use A325T (Full Thread)
Bolts (optional A490)
• ASTM F1852 Tension Control Bolt Option still available.
• All Secondary Connections (except girt to jambs) will
be A325T (T = full-thread bolts) ½” x 1½” plated bolts.
23
23
24. Pre-punched Holes
VP primary frames have pre-
punched holes for purlin
connections
VP University
30. Factory Welded
Clips
Bolted clips
used mainly
on all export
jobs. Avoids
damage to
welded clips
and allows
for easier
packing of
shipping
containers.
32. Primary Frames
Features & Benefits
What roof pitches are available
for Primary Frames?
–Usually 1/4:12 to 4:12, steeper
pitches available if needed
What is the maximum eave
height allowed?
–As required by the end user
VP University
52. Loads to the Foundation
LOAD
LOAD
Forces
VP University
53. Rigid Frames
Features & Benefits
Why or when should this type of
frame be used?
– When CLEAR SPANS are
required
How wide can a Rigid Frame be?
– VP has done them up to 300’
wide
VP University
65. CB with unequal
spacing
Remember: Everywhere you add an
Interior Column you have more
foundation and more labor.
Int.Col. Spacing less than 30’-0” usually
not economical.
67. Continuous Beam
Frames
Features & Benefits
When should this type of
frame be used?
– Wide Span Buildings
What does adding interior
columns do to the rafter?
– Makes it lighter VP University
68. Continuous Beam Frames
Features & Benefits
How does this affect the price
of the rafter?
– The price decreases
How wide can a CB frame be?
– VP has done them over 800’
wide
VP University
96. Materials
Back-to-Back Cees 3-Plate Built-Up
Cornerpost and Endpost G30
Acrylic; Rafter is 3-plate
VP University
97. Materials
•Endposts are:
•G30 acrylic
coated cold
formed CEEs
•riveted back-to-
back CEEs
•Single CEE (inset
girts only)
•3-plate welded
Cornerpost and solution as
Endpost G30 Acrylic; needed
Rafter is 3-plate •Tube and Hot
Roll endwall posts
are an option.
99. Rigid Frame with End
Posts
End Posts can be
used with any frame
type
VP University
100. Post and Beam
Stability
Automated diaphragm check;
If fails, Rods may automatically be
designed…
…Initially at interior bay…
…Then at endbay(s)
100
114. Concrete Compression
Strength
Don’t lose the
opportunity to
take advantage
of higher
strength concrete
when it’s already
specified on the
project.
120. Unsupported
Columns
and Rafters
Supported Members
have Flange Braces
Unsupported Members
do not have Flange Braces.
(may or may not have girts)
121. Unsupported
Columns
and Rafters
A column or rafter is considered
unsupported when it does not have
Lateral support.
This condition occurs when there
are no flange braces attached to
the compression (Inside) flange.
Unsupported columns are typically
more expensive than Supported.
122.
123. Primary Framing Tips
The more you reduce the span
of a member the more you
reduce the cost (to a certain
point)…
Tapered members most
economical
Span frames shortest distance
in building
124. Primary Framing Tips
Gage Post and Beam most
economical endwall frame
Reduce endbay span if
possible
Reduce Int. Col. Span near
sidewalls
Do Not specify deflection
higher than necessary
Open Web frames economical
with large spans and heavy
loads
Notas del editor
ROOF SLOPE or ROOF PITCH refers to how steep the roof is Expressed as RISE over RUN Run = 12 Common roof slopes for building systems: 1/4:12 1/2:12 1:12 2:12 4:12
Eave Height is measured from the floor level (bottom of the base plate) to the eave of the building.
Eave Height is measured from the floor level (bottom of the base plate) to the eave of the building.
Varco-Pruden offers both Clear Span and Modular frame types.
Primary frames are the support members that carry most of the building loads to the foundation. VP uses 50 ksi steel for all primary framing components. Frames are coated with a Bronze primer Special colors are available, check with your division VP can manufacture frame dimensions in increments of 1/16”.
Purlins are attached to the primary frames by means of pre-punched holes. -VP uses purlin clips only in certain conditions (steep roof pitches, open web framing systems, 11 1/2” purlins etc.).
Bolting Plates are used for most primary frame connections.
Bolting Plates are used for most primary frame connections.
Clips for girt connections are factory welded.
3. A roof pitch of 1:12 is most common. -1/2:12 is also reasonable when needed. -Roof pitches up to 4:12 & 5:12 are easy to obtain. -VP can design to almost any roof pitch required. -Less than 1/2:12 is not normally recommended (span and roof panel type must be considered). 4. Eave heights normally range from 10’ to 30’. VP has provided buildings with eave heights as high as 80’ and 100’ when required. Eave heights can be specified in 1/16” increments
Reverse Taper Columns available. The wall line is at the inside flange. Offers a smooth wall surface on the inside face with-out columns interrupting.
Hot Rolled Wide Flange members are also available.
Rigid Frames are primary frames most commonly used as interior frames.
Typical geometry of a Rigid Frame. The deepest portions of the columns and rafter generally occurs at the “haunch”. Rigid frames come standard with tapered exterior columns, but other options are available. Rigid Frames offer the advantage of economically spanning a distance without the interruption of interior columns.
The ridge does not have to be at the center of the span.
Rigid Frames can be single slope when needed.
Rigid frames transfer loads to the foundation
1. When we need to span a distance without interior columns interrupting the span. 2. VP can provide Rigid Frames as wide as 300’. -RF’s are most economical in spans of 40’ or 50’ up to 100’ and 120’. -Exceeding this can be very expensive. -In wide span buildings, RF’s should be used only when a clear span condition is truly needed.
Continuous Beam frames are Modular frames utilizing interior columns to reduce the rafter spans, and consequently the overall cost. CB frames come standard with tapered exterior columns and “I” shaped interior columns, but other options are available.
Offset Ridge - Not A Problem
Unequal modules - Not A Problem Columns should be spaced to best suit end user and construction needs. 50’ to 60’ is usually an efficient span between columns. This varies according to loads and conditions.
Single Slope CB frames are available
1. For wide span buildings in which interior columns are allowed. Most commonly used for large warehouses and manufacturing plants. 2. Any time the span of a rafter is decreased - it will require less steel and be lighter.
3. We pay for steel by the pound - this will decrease the cost. 4. Continuous Beam frames are very common in widths of 60’ through 300’ (depending upon loads). It is possible to span very great widths with CB frames. VP has gone up to 800’ wide.
Unibeam frames are primary frames and serve the same purpose as a Rigid Frame or CB Frame.
This is a typical Rigid Frame. Now let’s lay a Unibeam Frame on top to see the advantages.
Unibeam frames have some advantages over Rigid Frames in certain applications: -They provide more vertical clearance near the sidewalls. -This allows for mechanical work to be above the ceiling line in small office buildings (sprinkler pipes, HVAC ductwork, etc..).
Lean-to’s attach at either the eave of the building or below the eave.
Each endwall of a building is supported by an “End Frame” .
The most common type of End Frame is a “Post & Beam” frame, when future expansion is not anticipated.
For buildings with higher eave heights and/or heavy wind loads, the Post and Beam may be made from 3-plate built-up members.
For buildings with higher eave heights and/or heavy wind loads, the Post and Beam may be made from 3-plate built-up members.
When required, another primary frame type can be placed at the endwall of a building. -This frame could be a Rigid Frame (shown) with endpost -A Unibeam Frame -A CB Frame (recommended for large spans) -Or one of VP’s Open Web frame types This frame would be used in conjunction with end posts to support the endwall girts.
Most primary frames are “Moment Resisting”. -This means that they utilize “Rigid Connections” to resist loads imposed.
Post & Beam frames are not designed to resist the wind load blowing on the sidewalls of the building.
Wind loads from the building sidewalls are usually taken to the foundation by the use of diagonal bracing or the “diaphragm action” of the endwall panels.
Rigid Frames are “Moment Resisting” frames. Rigid connections are utilized at the haunches and at the ridge. Pinned connections are used at the bases. Both vertical and horizontal loads are resisted by this configuration.