AB Fence Construction Details
How to Build a Bond Beam
|
A single bond beam consists of two courses of AB Fence Panel Block that have their cores filled with sand mix grout. Horizontal steel
is placed between the two courses of block and will reinforce the entire bond beam. For additional support, wire stirrups are placed
in each of the first two cores from each end and approximately every other core with one stirrup per block minimum, to ensure that
the courses do not separate (ashlar patterned bond beams will require more vertical stirrups). This bond beam configuration creates
a solid structural beam capable of reinforcing the panel structure. Bond beams are used at the top and bottom of the panel to create
a unified panel structure. Intermediate bond beams are required as the AB Fence height increases.
|
-
Place first bond beam course, lay in rebar on the top of the
blocks. Rebar is commonly available at local suppliers in 10 ft.
and 20 ft. sections (3 m and 6 m).
-
Place second bond beam course.
-
Using funnel, start filling the blocks with grout.
-
Place stirrups in blocks.
-
Consolidate grout with a concrete vibrator.
-
Place additional grout to top off blocks after vibrating.
-
Entire bond beam must be cast at the same time.
-
Allow finished bond beam to cure four hours before stacking additional courses.
|
|
Fence Bond Beam
|
Note:
-
When placing sand mix grout, a concrete vibrator should be used to aid in the proper
consolidation of grout.
-
Seven panel block long bond beam shown.
|
Ashlar Pattern Bottom Bond Beam Placement
|
Note:
-
When placing sand mix grout, a concrete
vibrator should be used to aid in the proper
consolidation of grout.
-
Ten and a half panel block long bond beam shown.
|
Note: The AB Fence uses two different types of concrete during
construction. The piles and AB Fence Post Blocks use concrete
with gravel and sand size aggregate. This type of concrete
is generally available from concrete plants and used in most
types of construction. However, the bond beams require what
is referred to as a fine mix concrete grout. This mixture of
concrete uses only sand as the aggregate, which makes it ideal
for filling the smaller cores of the AB Fence Panel Block.
|
Pre-Made Bond Beams
|
Bond Beam Considerations
When building a patterned fence, the bond beam can be constructed either with full height blocks as
shown in the Standard Bond Beam Construction detail, or by using the single course pre-set pattern as
depicted in the Patterned Bond Beam Construction detail shown below. Proper consolidation of the
concrete grout as well as placement of the horizontal steel and wire stirrups are required for both options.
Wire stirrups are needed in each of the first two cores from each end and in every other
core or one per block (min). A concrete vibrator is required when placing concrete.
|
AB Ashlar Blend Pattern Fence - Standard Bond Beam Construction
AB Ashlar Blend Pattern Fence - Patterned Bond Beam Construction
|
