The load transfer at sawcut joints is typically negligible if, due to drying shrinkage and temperature shortening, the joint opens up wider than 0.04 inch through the depth of the slab. While it is common for joints to widen more than 0.04 inch at the surface, the width often narrows quickly with depth so that effective aggregate interlock load ...

The joint free slab system is a very appropriate system for retail centres and supermarkets ... however all too often in the field sawn joints are ineffective. If the saw cut is installed too long ... standard designs for 'deemed to comply' raft slabs on sites with differing site classification.

joints in those structures, this is the first ACI report to syn-thesize information on joint practices into a single document. Committee 224 hopes that this synthesis will promote con-tinued re-evaluation of recommendations for location and spacing of joints, and the development of further rational ap-proaches.

How Deep to Make Saw Cuts . A good rule of thumb is to cut the joints one-quarter to one-third the slab thickness.   For a 6-inch-thick slab, that means cutting 1.5 to 2 inches deep. Ensure that the saw cut depth meets the structural engineering specifications. If the joint is too deep, aggregate interlocking will not be sufficient to ...

Continue to saw at regular time intervals until the cut edges show only minimal raveling. When this happens, the slab is ready for sawcutting. Sometimes concrete cracks before the saw can cut the joint without causing raveling. In these cases, consider using a lightweight saw that allows you to cut within a few hours after final concrete finishing.

#EverythingAboutConcrete #MikeDayConcreteSaw cutting contraction joints in concrete floors and slabs. Does saw cutting joints in concrete really work?This vi...

Watch this video to see us prepare saw cuts in our concrete for joint filler application.Instant Medic Flex Joint Fillerhttps://

crack with a width of 3 mm or more that covers more than 10% of the total length of all the joints and edges of the slab and the total length is no more than 20% of the perimeter length of any one panel." In ... Decorative saw cuts Control joint 0 0.9 1.4 1.4 1.4 0.4 0.5 0.4 Tooled joint ineffective Figure 3 Example of cracking to patio slab-m

Soff-Cut also makes a beveled blade that is used on the second day to turn a typical saw cut joint (or early entry joint) into a decorative joint. Read more about Soff-Cut's Ultra Early Entry Concrete Cutting Saws and Diamond Blades. For bonded overlays, cut joints exactly to match the joints in the base slab. No additional joints are needed ...

6.2.1 Saw Cut Joints 17 6.2.2 Free Joints 17 6.3 Services Detailing 18 6.3.1 Within Slab Running of Services 18 6.3.2 Under Slab Running of Services 18 6.3.3 Recesses for Showers 20 6.3.4 Step Down of up to 600mm in the RibRaft® Floor 21 1.0 INTRO 22 2.0 SITE REQUIREMENTS 22 2.1 General 22 2.2 Temporary Excavations 22

Contraction joints are formed by saw cutting, by tooling a joint with a grooving tool, or by inserting a plastic strip into the concrete during finishing (zip-strip). Proper timing and depth of cut are essential. If you wait too long, the slab will crack where it wants to rather than where you want it to.

Once in the project you will just need to cut the floor to the line based family. If you add a shared reporting parameter into the line based family you can then schedule the length of the joints. You could also use this same workflow without cuting the slab, with simply a model line built into the family which will still allow you to schedule ...

Sa w cut joints in the same loca-tions as hand-tooled joints (Fi g u r e 1). Co n t r action or control joints should be sawcut on or at the cen-ter of column lines, with interm e d i - ate joints between column lines as n e c e s s a r y to keep the maximum distance between joints at 24 to 36 times the slab …

Rule of thumb is the joints spacing = 24x(slab thickness) up to 36x(slab thickness). 36(0.225 m) = 8.1 m. Thus you want control joints spaced between the construction joints by no more than 8m. Lay out the pours first, then lay out the control joints. Make sure to have a joint connecting into any re-entrant corners.

Shrinkage control joints should extend into the slab for one-quarter of the slab's depth (see Figure 2) and must not damage the DPM underneath. They may be formed either by saw cutting the slab after it has hardened or by casting a crack inducer into the slab when the concrete is poured. Control joints that are cut into the slab should be formed

The construction joints are to placed at the contractor's discretion and locations are specified parallel to the longitudinal steel spaced at approximately 16ft to 18ft oc (over the pier centerlines). The saw joints run in both directions at the spacings indicated above. The slab area is approimately 28000sf.