Camlocks And Forms Flashcards
Holes for a snap ties should be approximately__millimeter to__millimeter larger than the tie head, which is normally a 14 mm to 16 mm hole in the plywood
1 mm to 2 mm
When would stainless steel tires be used instead of wire ties?
When appearance as a factor
When erecting law forms using full sized forms, often an odd size space occurs what must be fabricated to fill these gaps
Filler pieces
What is the purpose of a strong back?
Max is an extra support and vertical member of form preventing buckling at horizontal form joints
What may result of the bracket wedges are tightened excessively?
Reduced wall sickness extra strain on tires damaged form panels
What care should be taken with wailers at external corners
Extend past the corners by 300 and 400 mm and be overlapped double nailed and locked with vertical 38 x 89 cornerlocks
What care should be taken with wailers at internal corners
Alternate The Wailers
What size holes are required to form ties used in the camlock forming system
21 mm
Describe two ways the tops of the forms may be held in alignment until the top wheeler is in place
Use temporary 38 x 89 Wheeler or are use 38 x 89 or 19 mm x 89 mm cleats
When placing the bracket for the camlock system onto the loop, end of the tie is it tightened as much as possible why or why not
No, the cones shatter the washer spend just on the whole TYs
In the camlock system, the bottom plate connect as the bottom, Whaler
Tru
In the camlock forming system, the tires are tightened to the wailers by driving an iron wedge between the tie in the Whaler
Boss
What may happen if the plywood sheathing is not the same as the frame of the wood framed panel?
Shallow fins will be formed on the concrete wall at the form joints
What two factors determine the horizontal spacing of ties
Size of the vertical wheelers and vertical spacing of the wailers
What determines the vertical spacing of Whalers?
1/3600+ spacing not exceeding 6 mm
What are three fastening systems used with wood frame panel forms
Coil, ties and bolts, panel, tie clamps, snap ties and wedges, whaler brackets, strong back hardware
What type of fastener can be used to anchor a wall formed to an existing structure?
Coil, ties, and bolts
Where is the proper location of a steel wedge on a snapped my head
At midpoint, wedge, or higher
What may happen if the steel wedges are overtightened?
It reduces the wall thickness burns the metal washers shatters the plastic cones puts extra strain on ties
Why should steal wedges be nailed in place after they are tightened
For extra strength and holding
How are the wailers locked on exterior corners?
Extending past the corners by at least 6 to 12 inches, double nailed locked with two vertical corner locks and laced
When forms are braced on one side, only the braces should be strong and rigid enough to resist both tension and compression
Tension will pull the wall apart and compression will pull it together. It needs to be solid enough to resist, pulling or pushing.
Describe the plywood used with the Duraform forming system
30 mm plywood with a high density overlay is used
What are Bakker bars?
Metal whaler bars, fastened permanently onto the form panels with latches and slots
