OPERATIONS
SECTION 1
S1-9
• BEFORE STARTING •
Before starting the air powered screed, there are a few items that need to be looked over.
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Make sure that bolts are secure and will not vibrate loose.
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Check jam nuts on top pipe to ensure that they are tight against the top pipe coupler.
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Check the hydraulic level in the tank for the hydraulic winches (if applicable).
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Check winch cables to make sure that they will not loosen during the screed run.
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Look over the forms to check for unevenness so that the screed will not hang up.
Ask yourselves these questions when preparing your screed for a job.
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What is the “exact” pour width?
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What is the slump?
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Is the slab flat, crowned, or inverted?
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What is the required surface tolerance?
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Choose screed type and size based on the above information.
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Are any accessories required?
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Do the winches work properly?
• OPERATING •
Operating your air powered screed correctly will greatly produce the outcome of the pour. Follow the instructions below to
operate your screed correctly and you will be very pleased with your equipment.
THE JOB SITE:
FORMS
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Are they stable?
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Will they support the weight of the screed?
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Have the form pins been driven below the top of the forms?
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Can the screed pass from form to form without getting caught?
COLUMNS & WALLS
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Screed size is important.
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How will you go through the columns?
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Consider the use of HD winches & 6" extension handles.
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What do you do when your up against a wall?
a) wall bracket b) pipe rail c) form
CONCRETE
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Are there any mix characteristics or additives that effect the performance of the screed?
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Will the supply of concrete be steady or intermittent?
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Be aware of the importance of WEATHER!
THE CREW
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Two key people should be trained to operate the screed.
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The screed is a finishing machine, there is a technique to it's operation. The TRAVEL SPEED,
the VIBRATORY FREQUENCY, and the FEEDING of the screed must all be controlled.
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Knowing how the winches operate before you start is essential.
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To what do you hook the cables, and when do you move them?
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Pay attention to safety with the cables.
