working loads of 20 pounds per square foot load, plus
the dead load, and the load from a 70 mph wind.
The building can be easily modified to varying
lengths and purposes by taking out or adding bays or
by substituting various foundation and wall sections.
A bay is the distance between two column centers or
between the end wall and the first column center in
from the end wall.
Formulas used to determine the number of bays,
frames, and intermediate frames in a building are as follows:
Length divided by 20= number of bays
Bays + 1 = total number of frames
Total number of frames -2 = number of intermediate
Extensive pre-erection work is required before
you start the actual erection of a building. After the
building site is located and laid out by the Engineering
Aids, it will then be cleared and leveled by Equipment
Operators. Batter boards are set up in pairs where each
comer of the foundation is located. Builders fabricate
the forms for concrete while Steelworkers are cutting,
bending, tying, and placing reinforcing steel. If this
particular building requires underslab utilities (that is,
plumbing and electrical service), the Utilitiesman and
Construction Electricians will also be on the jobsite.
Last, all underslab work must be completed and pass
all Quality Control inspections before concrete is
placed and finished.
Most importantly (as far as ease of erection is
concerned), before the concrete is placed, templates
for the anchor bolts are attached to the forms, and the
anchor bolts are inserted through the holes in each.
Next, the forms are tied to make sure they remain
vertical. It must be stressed at this point that the proper
placement of the anchor bolts is absolutely critical in
the erection of a P.E.B. You will only have a tolerance
of plus or minus one eighth of an inch to work with.
The threads of the bolts are greased, and the nuts are
placed on them to protect the threads. Concrete is
poured into the formwork and worked carefully into
place around these bolts, so they will remain vertical
and in place. Finally, according to the plans and
specifications, the slab is poured.
While the foundation is being prepared, the crew
leader will assign personnel/crews to perrform various
types of preliminary work, such as uncrating and
inventorying all material on the shipping list, bolting
up rigid-frame assemblies, assembling door eaves,
and glazing windows. Box 1 contains the erection
manual, the drawings, and an inventory list and should
be opened first. If all of the preliminary work is done
correctly, the assembly and erection of the entire
building is accomplished easily and quickly.
All material, except the sheeting, should be
uncrated and laid out in an order] y manner, so the parts
can be located easily. Do not uncrate the sheeting until
you are ready to install it. When opening the crates,
use care not to cause any undue damage to the lumber.
This is important since the lumber can be used for
sawhorses and various other items around the jobsite.
In most situations, after the building foundation
has been prepared, building materials should be placed
around the building site new the location where they
will be used (fig. 8-2). This action provides the
greatest accessibility during assembly.
Girts, purlins, cave struts, and brace rods should
be equally divided along both sides of the foundation.
Figure 8-2.Material layout