Visit our design
center to see various colors.
SLUMPED BLOCK UNIT
Orco slumped block is a structural concrete masonry that conforms
to standards for hollow load bearing concrete masonry units as published
by the Concrete Masonry Association and exceeds A.S.T.M. C-90-96
Standards and UBC Standard 21-4.
SLUMPED ONE SIDE UNITS
Due to manufacturing procedure of the slumped one side units, the
smooth side dimension will be approximately ½ inch shorter
in length than the slumped side length. Slumped one side units are
in fact more smooth on one side than on the other. When the slumped
one side units are considered in connection with a precision block,
please request a sample of both types of block as the finishes do
differ. Slumped block may not have the same texture from run to
run or block to block, and is not intended to resemble a precision
block in texture or dimensional stability. The slumped block has
a much denser finish than the precision block, therefore you have
two different textures.
These units have been designed to be used in areas in which you
prefer not to use a 2” cap unit. The por-cap unit has the
cells filled to an approximate depth of 1” at the time of
manufacture so you have a built-in cap. The por-cap unit is placed
on the wall after all the cells in the wall that need to be grouted
We tried to reproduce the real adobe that is so much a part of California
heritage, hence we try to achieve a gentle roll to our slumped block.
The standard slumped texture is on all four sides of the unit. The
4” high slumped block has a different texture than the 6”
high unit. The reason is due to the process of manufacturing. Please
call us for samples before selecting the block. Each slumped block
will no have the exact texture from block and run to run and is
not intended to resemble a precision block.
Every effort is made to insure color consistency by Orco Block,
however, it must be understood that we are using material from the
earth and we cannot control the color variation in the cement and
sand which will change the color slightly from run to run. We guarantee
the color only to range of color. For larger projects, we recommend
that you have your block manufactured in “one run”.
This will help to control the color range. We have a variety of
colors from which to make your selection. There may be an additional
charge for the color you select. Refer to the Price List for this
information. Orco Block recommends using matching mortar when using
a colored slumped block. Please call your architectural representative
for additional information.
HI-STRESS SLUMPED BLOCK
Hi-stress slumped block is not kept in stock. It is a special order
that is made upon request for a nominal charge. Remember, there
is a big difference between a 3,000 lb. net P.S.I. block an f’m
of 3,000 lb. When ordering the net P.S.I. of the block be sure to
select the correct block value, because the prices do vary. For
example, a 3,000 net P.S.I. block costs more than a 2,000 net P.S.I.
SLUMPED BLOCK DIMENSIONS
Slumped block is available in four inch and six inch heights only.
Common practice in describing masonry units is to give the width
first, the height second and the length last, followed by a descriptive
name. For example, an 8x4x16 slumped block is approximately 7 ½”
x 3 ½” x 15 ½”. Please note these sizes
are a block modular dimension for height and length. Width of the
slumped block unit may vary 1” or more for texture. Use a
½” mortar joint for all slumped block. All pertinent
dimensions and minimum shell thickness are shown. Rather than repeat
dimensions for each unit, the slumped block in each group is dimensioned
and these dimensions apply to other units in the same group. Where
there are variations in the units, applicable dimensions are shown
for the individual unit.
SLUMPED BLOCK OPEN END UNITS
These units are available in 4” and 6” high. Units available
as a slumped block open end and also available upon request as a
slumped one-side unit. A minimum inventory is carried. Contact your
nearest office for availability.
FENCE UNITS (Comparing 6x6x16 versus 6x6x18 units)
The fence units shown here are for fences only. Note the length
is 16” long. This gives you more wall for the money. For example:
A wall 100’ long and 6’ high would take 75 16”
units for one course. 75 x 12 courses = 900 – 16” units
For an 18” long block it takes 67 block to equal 100’.
67x12 courses = 804. The difference between 900 and 804 is 96 units.
The savings is revealed not only in the block price but the installation
labor cost. These blocks should not be used
in building. They will not work out to a module of 0”- 4”
or 8” and your building will be off at the doors and windows.
SOS = Slump One Side