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Terms in this set (35)
Gives nailing support for the braces; the point of this should be away from the form.
Holds forms at proper distance apart and prevents them from under pressure
Steel blocks placed over the end of the snap ties for tightening
Brace placed at the bottom to prevent the formwork from moving.
Vertical members that supports and adds rigidity to the sheathing
Forms a water tight, smooth enclosure to shape and retain the concrete until it sets
Angular member that stiffens and strengthens the formwork
Wall Form Members
Sheathing, stud, waler, stake, deadman, snap ties, wedges
Braces: Knee brace, kicker
Materials used for form - Metal
Used when added strength is needed or when the construction will be duplicated
Basic formwork design considerations (Part 1)
Practical and economical to manufacture and use
Basic Formwork design considerations (Part 2)
Simple to build and easy to handle on the job
Materials used for formwork
Earth, wood and metal
Materials used for formwork - earth
Can be used when the soil is stable
Materials used for formwork - wood
most widely used material for formwork
A mold for concrete being placed in beams, griders, and floor slabs above the 1st floor
May be used instead of steaks
Wall Forms Definition
Must be tight enough to prevent leakage through the joints
Horizontal members used to align and brace concrete wall forms
Made up of wood, steel or cardboard, impregnanted with a waterproofing compound.
Subject to great pressure near the bottom.
Yokes are closer together as it nears the bottom.
Yokes (short wales)
Installed around the outside of column forms to prevent spreading during concrete placement
Rebar Support High Chair
Supports top bars in slabs, joists and beams.
Rebar Support Beam Bolster
Supports bottom beam bars
Rebar Support Slab Bolster
Supports bottom slab bars
Normally constructed with "2 by" material 2" X 4", 2" X 6" etc set on edge and braced by stakes driven firmly into the ground behind
Ramp Formwork Definition
designed to move heavy objects up an incline, to make elevated areas accessible for handicapped personnel
rule of thumb is that every 12" of rise should have at least 6' of run
Ramp Formwork: Need to know
At the beginning of the ramp ensure that the concrete is at least 2" thick for light traffic and 4" for heavy traffic
Designed to obtain access from 1st floor to the 2nd floor
Need to know again
Eleven standard sizes, #3 through #11, #14, and #18.
Used on #4 rebar or smaller
oxy and gas cutting torch cuts this
Bending methods for reinforcing bars
Bending table, bending tool and iron master hydraulic bender/sheer
Need to know about sharp bends
For smooth sharp bends when bending large rods slip a cheater pipe over the rod.
It gives you a better hold and makes bending operations smoother
Heating is not allowed by specifications due to extreme loss of strength.
Splices must conform to drawings and specifications. If no other standards are available lap all spices at least 30 X bar diameter but not less than 12"
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