Fence mount a top of Precast Concrete Block modules
Fence mount a top of Precast Concrete Block modules
(OP)
How deep the fence post should be grouted on 300lb/ft block module the dimensions of precast module is 6ft L X 2ft W X 1 ft H & wt of each module is 1800lbs. Assuming ht of fence is 3.0ft & post spacing not to exceed 6.0ft
When doing overturning force calculation should i compare Overturning moment V/s Wt of the Block & ensure overturning force never exceeds resisiting Block Mass i.e
ht of fence + max embedment in block= 3ft+1ft
Checking for UDL load
50X4=150lb-ft + Soil & Surcharge moment load < 300lb/ft (block mass per ft)
In order to trigger overturning failure driving moment must exceed block wt.
Checking for post load
assuming post spacing must not exceed size of block i.e 6.0ft & fence post is mounted on center of the block
224 X 4 + Soil & Surcharge moment load < 1800lbs total wt of block
Top Course & Second Course have a shear key connection.
or should i compare overturning moment to resisting moment (at point of rotation)
When doing overturning force calculation should i compare Overturning moment V/s Wt of the Block & ensure overturning force never exceeds resisiting Block Mass i.e
ht of fence + max embedment in block= 3ft+1ft
Checking for UDL load
50X4=150lb-ft + Soil & Surcharge moment load < 300lb/ft (block mass per ft)
In order to trigger overturning failure driving moment must exceed block wt.
Checking for post load
assuming post spacing must not exceed size of block i.e 6.0ft & fence post is mounted on center of the block
224 X 4 + Soil & Surcharge moment load < 1800lbs total wt of block
Top Course & Second Course have a shear key connection.
or should i compare overturning moment to resisting moment (at point of rotation)





RE: Fence mount a top of Precast Concrete Block modules
RE: Fence mount a top of Precast Concrete Block modules
If only a fence, then wind load would likely prevail. If it is not a solid fence, then I wouldn't worry about it...just anchor a reasonable amount and don't overthink it. If a guardrail, it is likely not high enough and will have to meet a lateral load resistance requirement in addition to the wind loads.
RE: Fence mount a top of Precast Concrete Block modules
We are located in Canada. The fence could be chain link fence or Pedestrian guard railing the ht would be 3 to 6 ft max. I am aware the best option would be to plan it behind on a separate footing there is a Sleeve-It fence product from Strata we have looked on it our plan is to bring fence in line with retaining wall for aesthetics point & save some real estate space.
There are some massive machine place blocks Lock -block, Redi Rock almost weighing 1Tonne per module.
i was thinking how high can we mount a non wind bearing fall protection fence on those massive blocks & also meet all the UBC loading requirements for non wind bearing fence.
RE: Fence mount a top of Precast Concrete Block modules
EIT
www.HowToEngineer.com
RE: Fence mount a top of Precast Concrete Block modules