| 摘要 |
<p>An apparatus (10) for screeding and smoothing an uncured concrete surface includes a concrete surface working member (20), such as a vibrating beam or member, and a grade setting device (18) adjustably mounted to the vibrating beam (20). The apparatus may include a wheeled support (217) which at least partially supports the vibrating beam (20) and/or the grade setting device (18). The wheels (217b) of the wheeled support (217) may be powered or driven to assist an operator in moving the apparatus over and through the uncured concrete. The grade setting device (18) is vertically adjustable to set or indicate the desired grade of the concrete surface as the screeding apparatus is moved over and through the uncured concrete. The grade setting device (18) may be adjusted by a laser plane responsive control system.</p> |
