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thank you Guys, just to clarify 5.5ft footing was for shorter section of the wall at the front of the site Main wall: 12ft high masonry , 10" block 6.5ft wide continuous footing with 2 ft deep and 12"x12" key at middle of footing use #6 @ 24" vertical reinforcement on...

Its 12 ft high 5.5 ft footing 10 in block (L Shape free standing wall) at right way line around the site Any reference or idea appreciated Thank you

Sorry for confusion..... I designed the wall by itself.( hand calcs and used retain pro) It's a perimeter wall for a site not retaining any soil( like 6 " above footing and 6" behind wall) One off my colleague bring idea for column at certain spacing because the wall is 12 ft high. I m not...

Hi all, I am designing a free standing reinforced masonry wall( perimeter wall). 12 ft high wall with 5.5 ft wide continuous footing.( L shape due to right way limit) I checked all stability requirements. Overturning, sliding, soil pressure ,, And strength of wall and footing Does it required...

Thank you.

Hello, i am designing a machine block foundation (5'deep). I provide reinforcement near all faces, but one of my coworkers recommend that i add intermediate layer of reinforcement. are intermediate horizontal rebars of two-way reinforcing needed for concrete block/foundation 5' deep( with...

Thank you for valuable information.

SlideRuleEra so the steel reinforcement only near faces no intermediate layer needed. my block foundation is 23' Long 15'Width 5'Thick Thanks everyone for valuable information.

saikee119 Yes, that s right ACI351.3R for foundation for dynamic equipment. i m using ACI 351.3R but for foundation thicker than 4 ft ACI 351.3R suggested to use ACI207.2R for minimum reinforcement. this my first time using ACI207.2R , so i was confused about reinforcement layout for block...

i m using Gergerly-Lutz crack width formula for the stress in reinforcement fs and another formula to get area of reinforcing bar from ACI 207.2R just i didnt picture concrete block with reinforcement only near all faces with nothing inside. thank you

That example was for 6 ft thick power-plant base slab. I m designing 5 ft block for grinding machine. i m using that example as reference but got me confuse. is the steel only at face not inside the block.

Hello all, anyone familiar with ACI 207.2R steel reinforcement for thick block foundation I need some clarification ACI 207.2R . their example about 6' thick slab for plant, they come out with # 11 @ 6 in. o.c in each face. is it only at face or through out the block? i know for machine...

Thank you guys, i m following ACI App. D. I will look for cage requirement and reinforcement on app D

Hello All, i m designing a foundation for heavy machine, but i couldn't find any guide about steel reinforcement. i know we need: . reinforcement in all faces . shrinkage do we have to have a cage around anchors bolt( machine will be anchor to foundation in four spot(6 bolt at each...

Thank you Retired13,

Thank you for the clarification, I did use chapter 13 and chapter 15( non building structures) to get the force. The force from chapter 15 was more conservative. i m following ACI318 App. D for anchorage design. is there any rule of thumb for minimum embedment of anchor? our block foundation...

Hello everyone, i have a some questions about machine foundation design. 1- do we have to do analysis for wind and seismic for heavy machine( 90000 lb) or we have to show that overturning FS >1.5 , so no net uplift( but i m not sure witch chapter to use for heavy machine) 2- for anchor...

Thank you for input. the grinders will be anchor in four spot on 2'x2' plates at area 12'x10' i was thinking about mat( 14'x12') under footing instead of big block.

based of manufacturer drawing the plates are pre-drilled to be anchor to foundation.

Hi All, I m working on design of foundation for horizontal wood grinders. have anyone use that rule of thumb for machine foundation design that (mass of foundation should be 3 times mass of machine). machine weight 94000 lbs any reference would be great. thank you