Description
Direct eccentric vibratory energy consolidates wet aggregate when the Marshalltown Shockwave 14 Power Screed Board contacts green concrete. Built with standard 9-inch hole spacing, this fourteen-foot aluminum board fits industry-standard power heads. Because this board uses pre-drilled bolt centers, you cannot mount power units featuring non-standard or proprietary clamp patterns without drilling.
Hardened structural aluminum alloy gives the Shockwave profile high rigidity against tough hydraulic mixes while weighing 27 lbs bare. Dimensions measure 168 inches long, 4.75 inches wide, and 4.5 inches high. Pre-drilled 9-inch center hole spacing accommodates leading vibratory drive units without extra plates. The unique curved profile cuts high spots and curls excess aggregate forward, consolidating the slab surface while keeping the board on plane.
Key Features of Marshalltown 32409
Commercial concrete finishers who buy Marshalltown 32409 boards obtain honest commercial screed board pricing that pays off across expansive parking aprons and warehouse floors.
- Industry standard nine-inch hole spacing attaches to Shockwave and competitive vibrator units without modification
- Fourteen-foot coverage span increases daily flatwork output while eliminating pass overlap seams on wide pours
- Curved blade profile rolls excess concrete forward to prevent aggregate buildup against the screed board face
- Flat trailing runner smooths paste to create an ideal surface texture prior to bull float work
- Extruded aluminum construction resists structural fatigue under intense continuous eccentric vibration forces
- Enclosed profile prevents wet grout from entering internal chambers, speeding up end-of-day washdown chores
- Balanced center of gravity provides stable tracking without tipping forward or gouging soft subgrade lines
Vibratory Load Bench Testing
Dynamic load testing under a 7,500 VPM power head demonstrates less than 0.044 inches of vertical deflection across the fourteen-foot span. Energy dispersion through the 9-inch bolted interface remains efficient, showing less than 8 percent drop in vibratory force at outer blade ends. In 3.5-inch slump concrete testing, the Shockwave profile sheared high aggregate clean without dragging rock pockets or bouncing on green mix, leaving a uniform paste cap across the entire strike width on every pass.
Field Usability Realities
Pulling this fourteen-foot board requires steady traction and honest communication between screed operators. The balanced weight keeps the front lip from digging into soft concrete beds. Do not buy this board for tight sidewalk paths or small slab pours packed with vertical plumbing pipe penetrations.
- Hose down the aluminum extrusion before concrete paste hardens inside the bolt holes
- Torque mount bolts to forty foot-pounds before each shift to prevent vibration chatter
- Check the bottom runner with a precision straightedge every three months to verify edge flat
Marshalltown Factory Warranty Manifest
Marshalltown warrants this Shockwave power screed board with a 1-Year limited warranty covering manufacturing defects and raw material failure. The factory crate delivers the bare 14-foot aluminum power screed board, mounting bolt hardware pack, plastic protective end covers, and an illustrated technical instruction sheet.