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No. Spec­i­fi­ca­tions in the Amer­i­ca Con­crete Insti­tute (ACI) do not lim­it the max­i­mum dis­tance con­crete can free fall. Engi­neer­ing stud­ies and reports have shown that free fall from up to 35′ doesn’t reduce con­crete qual­i­ty and there is no evi­dence of seg­re­ga­tion or weak­ened con­crete strength. ICF con­crete design calls for a high slump mix which assists in reduc­ing seg­re­ga­tion.

The con­trac­tor need­ed a build­ing solu­tion that would pro­vide a sus­tain­able devel­op­ment that would stim­u­late the local econ­o­my and pre­serve the his­toric feel of the com­mu­ni­ty. In addi­tion to the envi­ron­men­tal con­sid­er­a­tions, the com­mit­ment to pri­vate, ener­gy effi­cient units was a sell­ing point of build­ing with Fox Blocks ICF.

The Krafthaus home was built in the plains of Black For­est, Col­orado which meant a high water table (4’ below grade), poor soil qual­i­ty, and weath­er con­di­tions that includ­ed high wind gusts and snow drifts up to 5 feet tall.

Our insu­lat­ed con­crete forms are sol­id mono­lith­ic walls and with­stand the worst of rain­storms, fires, and high winds — includ­ing tor­na­does.

Pow­ell Coun­ty Emer­gency Oper­a­tions Cen­ter is designed to meet FEMA require­ments for chem­i­cal agent emer­gen­cies and storm resis­tance.

Fox Blocks was con­tact­ed to sup­ply some info for a quick sto­ry air­ing on Fox News, on fire resis­tant homes and ICFs.

The steel rein­forced con­crete, which can cure stronger than nor­mal con­crete because of the foam insu­la­tion, can with­stand winds of over 200 MPH, and pro­jec­tile debris trav­el­ing over 100 MPH. There are dozens of eye wit­ness exam­ples of ICF homes tak­ing EF5 tor­na­does head on with the walls still stand­ing.

Yes, con­sol­i­da­tion of the con­crete is one of the key ele­ments in the place­ment of con­crete in an ICF wall. Fox Blocks rec­om­mends inter­nal vibra­tion with a pen­cil vibra­tor, quick­ly in and slow­ly out.