{"id":25749,"date":"2026-11-12T10:30:00","date_gmt":"2026-11-12T02:30:00","guid":{"rendered":"https:\/\/believeindustry.company\/roll-forming-machine-foundation-requirements\/"},"modified":"2026-11-15T13:01:30","modified_gmt":"2026-11-15T05:01:30","slug":"roll-forming-machine-foundation-requirements","status":"publish","type":"post","link":"https:\/\/believeindustry.company\/tr\/roll-forming-machine-foundation-requirements\/","title":{"rendered":"Roll Forming Machine Foundation: 5 Concrete Layout Specs 2026"},"content":{"rendered":"\t\t
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Roll Forming Machine Foundation: 5 Concrete Specs and Layout Rules<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Short answer:<\/strong> A roll forming machine foundation is a reinforced concrete slab, usually 200 to 300 mm thick at C30\/37, cast as one continuous pour under the full line, with anchor bolt pockets set from the machine base plate drawing. It must hold 2 mm flatness over 3 m, carry the static and dynamic load of every stand, and stay isolated from building columns. A roll forming machine foundation that settles unevenly cannot be fixed with shims at commissioning. The civil work is the first tooling on the line.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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A roll former is a long, narrow, heavy chain of stands. Each stand pushes strip sideways. The reaction goes straight into the floor. The line does not behave like one press with one footprint. It behaves like 14 to 28 linked load points that must stay on a single plane for years.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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This guide covers the roll forming machine foundation civil package: concrete grade, thickness, reinforcement, anchor layout, vibration isolation, drainage and acceptance checks. For the mechanical sequence that follows, see the roll forming machine installation guide<\/a>. For the selection work that comes first, see how to choose a roll forming machine<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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1. Pour one continuous slab, not separate pads<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The most common civil mistake is a row of isolated pads, one under each stand. A roll forming machine foundation built that way settles at different rates. Stands 1 to 8 stay put while stands 9 to 16 drop 1 to 2 mm. Roll gaps open on one side. The strip twists. Shimming holds for one shift, not longer.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Cast the whole line width and length in one pour. The uncoiler, the straightener and feeder<\/a>, the forming stands, the punching unit, the cut off press and the run out stacker<\/a> all sit on the same roll forming machine foundation. On a 24 m line it is 26 to 28 m long and 1.6 to 2.2 m wide, with extra width at the hydraulic station.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Keep the roll forming machine foundation separate from building columns. Cut a 20 mm isolation joint around the full perimeter. Column footings move on their own schedule, and that movement becomes your alignment problem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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2. Set concrete grade, thickness and reinforcement by load<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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C30\/37 at 28 days covers almost every light and medium gauge line. C25\/30 works for a small trim line under 6 t. Heavy gauge rack or floor deck lines<\/a> above 22 t use C35\/45. The American Concrete Institute publishes the mix and curing rules on concrete.org<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Thickness follows mass and soil. At 150 kPa bearing capacity or better, 200 mm carries a light line, 250 mm a standard line, and 300 to 400 mm a heavy line with a flying shear. Below 100 kPa, a geotechnical report decides the section. The fib-international.org<\/a> guidance covers slabs under repeated machine loading.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Reinforcement is two layers of 12 to 16 mm bars at 150 to 200 mm centres with 40 to 50 mm cover. Add extra bars under the uncoiler and cut off press, where load concentrates, and a 300 mm edge beam 150 mm deeper than the roll forming machine foundation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Line class<\/th>Line mass<\/th>Slab thickness<\/th>Concrete grade<\/th>Reinforcement<\/th><\/tr>\n<\/thead>\n
Light trim or furring line<\/td>4 to 8 t<\/td>200 mm<\/td>C25\/30<\/td>Double 12 mm at 200 mm<\/td><\/tr>\n
Standard purlin or cable tray line<\/td>8 to 16 t<\/td>250 mm<\/td>C30\/37<\/td>Double 12 mm at 150 mm<\/td><\/tr>\n
Heavy rack or step beam line<\/td>16 to 22 t<\/td>300 mm<\/td>C30\/37<\/td>Double 16 mm at 150 mm<\/td><\/tr>\n
Heavy gauge line with flying shear<\/td>22 to 35 t<\/td>350 to 400 mm<\/td>C35\/45<\/td>Double 16 mm at 150 mm plus edge beams<\/td><\/tr>\n
Any line on soft ground below 100 kPa<\/td>Any<\/td>Per soil report<\/td>C30\/37 minimum<\/td>Per structural design<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A roll forming machine foundation is sized by the heaviest stand, not the average. Ask the supplier for a base plate drawing with the mass of every module. If that drawing does not exist yet, the roll forming machine line<\/a> layout gives the module count and footprint to start from.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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3. Fix the anchor bolt layout from the base plate drawing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Anchor positions come from the machine, never the civil contractor. The supplier issues a base plate drawing with every hole, its diameter, offset from the line centre and design load. A roll forming machine foundation poured before that drawing arrives is a gamble. Set cast in sleeves to the drawing, then place the bolts after the machine is set.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Cast in anchor bolts with a hooked end are cheaper and hold steady load. Chemical anchors give more freedom if the mill base<\/a> design changes late, but need correct embedment and a clean, dry hole. On a 250 mm roll forming machine foundation, M20 bolts with 300 to 350 mm embedment need a locally thickened pocket.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Item<\/th>Typical spec<\/th>Why it matters<\/th><\/tr>\n<\/thead>\n
Bolt size<\/td>M16 to M24, usually M20<\/td>Matches the base plate holes<\/td><\/tr>\n
Embedment<\/td>12 to 15 times bolt diameter<\/td>Pull out resistance under impact<\/td><\/tr>\n
Pocket size<\/td>100 to 150 mm square<\/td>Room to align the bolt after setting<\/td><\/tr>\n
Offset from line centre<\/td>Per supplier drawing, \u00b12 mm<\/td>Keeps stands on one axis<\/td><\/tr>\n
Edge distance<\/td>Minimum 150 mm<\/td>Prevents concrete breakout<\/td><\/tr>\n
Bolt projection above grout<\/td>30 to 40 mm<\/td>Full nut engagement plus washer<\/td><\/tr>\n
Re torque<\/td>After 7 days and after 28 days<\/td>Grout and concrete shrink as they cure<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Leave a 25 to 50 mm gap under each base plate for non shrink grout, poured after the line is levelled. A roll forming machine foundation with base plates cast flush into concrete cannot be corrected later. Level on steel shims, verify with a laser, then grout. Cable routes, hydraulic lines and the drain channel must be cast in now. Retrofitting costs a week.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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4. Control vibration, grout and floor flatness<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Forming loads are steady. Punching and cutting loads are not. A hydraulic punch at 10 to 15 m\/min and a flying saw at 20 to 35 m\/min send short impulses into the roll forming machine foundation, loosening bolts and opening micro cracks at the grout line.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Use a 10 to 20 mm elastomeric pad under the punching unit and cut off press only. Do not isolate the forming stands; they must stay rigidly tied to one plane. Spring isolators suit a heavy press above 10 t. MHI<\/a> covers anchoring standards and steelconstruction.info<\/a> covers base plate levelling.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Grout is non shrink and flowable, with strength at or above the roll forming machine foundation. Pour from one side so air escapes on the other, then cure before the first run. Voids under a base plate read as a soft stand: the roll gap changes whenever strip hits a weld.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Check<\/th>Target<\/th>How to measure<\/th><\/tr>\n<\/thead>\n
Slab flatness<\/td>2 mm over any 3 m<\/td>Straightedge and feeler gauge<\/td><\/tr>\n
Full line level<\/td>\u00b11 mm end to end<\/td>Laser level or optical level<\/td><\/tr>\n
Line centre straightness<\/td>\u00b11 mm over 24 m<\/td>Piano wire or laser<\/td><\/tr>\n
Grout thickness<\/td>25 to 50 mm, no voids<\/td>Tap test plus visual at edges<\/td><\/tr>\n
Concrete strength at machine setting<\/td>100% of 28 day grade<\/td>Cube or cylinder test report<\/td><\/tr>\n
Anchor bolt torque<\/td>Per supplier table, \u00b110%<\/td>Calibrated torque wrench<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Do not set the machine before full 28 day strength. Seven day strength is enough for foot traffic, not for a 20 t line. A roll forming machine foundation loaded early takes a permanent set that shows as bow and twist in the first coils.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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5. Plan drainage, joints and service routes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Coolant, hydraulic oil and wash water end up on the floor. Give the roll forming machine foundation a 1 to 2% fall to a channel outside the machine footprint, clear of the anchor line, with a removable grating and a sump at the low end. Water under a base plate corrodes the shim pack from below.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Cast cable sleeves into the roll forming machine foundation before the pour for the control cabinet, hydraulic station and operator station. Check the schedule against the punching die and control layout<\/a> to avoid cutting a trench later. Saw cut contraction joints every 5 to 6 m, never through a base plate or anchor pocket.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Mark the coil loading bay with distinct floor colour and leave 2 to 3 m of spare roll forming machine foundation at the exit end. A custom roll forming line<\/a> may gain a second stacker or inline welder later.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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6. Work the load calculation before the pour<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Take a 16 t line on a 26 m by 2.0 m slab. Static load is 157 kN. Apply a dynamic factor of 1.3 for the punch and saw: 204 kN design load over 52 m\u00b2, or 3.9 kN\/m\u00b2 average. The uncoiler and cut off press concentrate 35% of that into 4 m\u00b2, so the local figure reaches 18 kN\/m\u00b2. That local number, not the average, sets the slab section.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Input<\/th>Value<\/th>Source<\/th><\/tr>\n<\/thead>\n
Total line mass<\/td>16,000 kg<\/td>Supplier mass list<\/td><\/tr>\n
Dynamic factor<\/td>1.3<\/td>Punch plus flying saw<\/td><\/tr>\n
Design load<\/td>204 kN<\/td>157 kN x 1.3<\/td><\/tr>\n
Slab area<\/td>52 m\u00b2<\/td>26 m x 2.0 m<\/td><\/tr>\n
Average pressure<\/td>3.9 kN\/m\u00b2<\/td>204 \/ 52<\/td><\/tr>\n
Local pressure at heavy modules<\/td>18 kN\/m\u00b2<\/td>35% of load on 4 m\u00b2<\/td><\/tr>\n
Soil bearing capacity<\/td>150 kPa minimum<\/td>Geotechnical report<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Check those numbers against the quality control documentation<\/a> shipped with the line. A roll forming machine foundation design that matches the supplier mass list is easier to sign off than one based on a brochure weight.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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7. Acceptance checks before the machine lands<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Walk the roll forming machine foundation with the commissioning engineer and civil contractor together. Bring the base plate drawing, a laser level, a torque wrench and the cube test report. Sign nothing until six checks pass on the roll forming machine foundation: concrete at C30\/37 at 28 days, anchor pockets within \u00b12 mm, 2 mm flatness over 3 m and \u00b11 mm end to end, 1 to 2% drainage fall, isolation joints and cable sleeves clear of base plates, and no standing water or curing compound under the grout.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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This is also the moment to confirm the installation plan<\/a> and the civil budget<\/a> still match what was poured. Fixing a misplaced pocket before the machine arrives costs an hour. After 16 t of stands are bolted down, it costs a day.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Believe Industry has built custom roll forming lines since 2005, with 15+ years of experience, 80+ engineers and 500+ projects in 50+ countries under ISO 9001 and CE. We issue the base plate drawing, the mass list and the anchor schedule before the civil contractor starts, because a roll forming machine foundation is cheaper to get right on paper than in cured concrete.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Q: How thick should a roll forming machine foundation be?<\/p>

A: 200 mm for a light trim line under 8 t, 250 mm for a standard purlin or cable tray line, 300 mm for a heavy rack line, and 350 to 400 mm for a heavy gauge line with a flying shear. All figures assume soil bearing capacity of 150 kPa or better. Below 100 kPa, use a geotechnical report and a structural design.<\/div><\/div>\n

Q: Can I bolt a roll forming line onto an existing factory floor?<\/p>

A: Only if the existing slab passes a thickness and reinforcement check. Most general purpose factory slabs are 150 to 200 mm with single layer mesh, which is not enough for a 16 t line with a punch. A roll forming machine foundation usually needs a new isolated pour cut into the old floor, with a 20 mm isolation joint all around.<\/div><\/div>\n

Q: What concrete grade is needed?<\/p>

A: C30\/37 at 28 days covers most lines. C25\/30 suits a small trim line under 6 t. C35\/45 suits heavy gauge lines above 22 t. Do not set the machine before the cube or cylinder report confirms full 28 day strength.<\/div><\/div>\n

Q: How are anchor bolts positioned?<\/p>

A: From the supplier base plate drawing, with \u00b12 mm tolerance on the offset from the line centre. Use cast in sleeves or pockets 100 to 150 mm square, M16 to M24 bolts, and embedment of 12 to 15 times the bolt diameter. Re torque after 7 days and again after 28 days.<\/div><\/div>\n

Q: Does the whole line need vibration isolation?<\/p>

A: No. Isolate only the punching unit and the cut off press with 10 to 20 mm elastomeric pads or spring mounts. Keep the forming stands rigidly tied to one plane. Isolating the stands lets roll gaps drift between modules.<\/div><\/div>\n

Q: When can the machine be installed after the pour?<\/p>

A: Wait for the full 28 day cure and a passing strength report. Seven day strength is enough for foot traffic and parts storage, not for a 20 t line. Loading a roll forming machine foundation early causes a permanent set that shows as bow and twist in the first coils.<\/div><\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Bottom Line<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Five specs decide whether the line stays aligned: one continuous pour, the right thickness for the heaviest module, anchor positions taken from the base plate drawing, 2 mm flatness over 3 m with proper grout, and drainage cast in before the concrete sets. A roll forming machine foundation is not a commodity floor slab. It is a precision reference surface that the upright rack<\/a>, cable tray<\/a> and step beam<\/a> lines all depend on for the next 15 years.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Last updated: 2026-11-12<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Article Changelog<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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2026-11-12: Initial publication in the 2026-11-12 calendar slot, backfilled on 2026-11-15.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Next Review Triggers<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Supplier base plate drawing or module mass list is revised; a new heavy gauge line enters the product range; soil bearing data from a new plant changes the slab section; a customer reports settlement on an installed line; concrete or grout standards are updated by ACI or fib.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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