Heavy structures such as foundations, as well as large concrete sections have larger volumetric texture and thicker rebar size. Therefore, there is more pressure applied to armatures in such sections in comparison with other sections like ceilings and bars. Then it is necessary to select a suitable plastic spacer with required resistance for tolerate of applied pressure. Hard Fix Spacer is the most suitable part for providing a concrete coverage in all heavy and dense floors such as foundation, bears, tie rides and volume floors.
Hard Fixes may tolerate point loads of 350 up to 600 kg. Then they may provide suitable concrete coverage for rebar after calculation of the weight of bars and live/dead loads and putting suitable number of hard fix spacers.
Regarding the special design and high bearing capacity, Hard Fix Spacer is special in heavy & semi-heavy levels.
In those surfaces in which there is ultra-heavy rebar, it is necessary to calculate the weight of rebar structure in one square meter. Then according to the point bearing capacity of Hard Fix Spacer, it is possible to specify required number of which in one square meter plus current live / dead loads.
In case, after calculating the weight of the rebar network in one square meter, the numbers obtained are moderate to low with consideration of live / dead loads, the Max Fix spacer can be used instead of the hard fix spacer for more economic purposes.
It is suggested to use Hard Fix Spacer for any constructions with rebar diameter of minimum 14, because rebar with lower diameter could not be locked inside the tentacles of the plastic cover and may disturb the exact size of concrete coverage on rebar.
Be careful not to insert the rebar into the spacer along with twisting and turning to sideways because it may break the plastic spacer tentacles.
Hard Fix Spacer has been designed for location of rebar with a diameter at most 32mm. Then in case of providing a concrete cover for rebar with unusual sizes and greater than 32mm, it is non-suitable to apply plastic spacers.