Slackdaddy
Gold Member
I have a CK20HST
I have a smallcreek on my property that I would like to build a bridge over for the CK20.
Clear span of the beams would be ~14' ,, that would get me back 2' or so from the banks.
The terrain is a typ Mid Atlantic "Creek Bottom" ,, pool table flat semi wooded creek bottom (100 yards wide) with 5-6' wide creek.
I plan to go back about 2' from the bank and use post hole diggers and go down about 30" with 2 holes on each side of the creek,
The 2 holes will be the width of the bridge. Put some rebar down the holes and fill them with concrete.
Then build a box form about 12" high and 5' wide , laid on the ground around the post holes,, then fill the form with concrete (reinforced with rebar).
These would be the concrete "blocks" anchored into the ground that the bridge beams would rest on.
I plan to make 2 beams for the bridge, each beam centered under the tires.
Each beam would be made out of P.T. 5 or 6 2x8x14s laminated together to make a 7-1/4" deep by 7-1/2" wide beam
Here is the part I can not find the math on,,, How much point load would said beam carry spanning 14' ?
Truthfully, it would not really be a true point load, it would be spread over the front and rear tires.
Any words of wisdom ?
Below is a picture of a foot bridge I put in about 10 years ago
I have a smallcreek on my property that I would like to build a bridge over for the CK20.
Clear span of the beams would be ~14' ,, that would get me back 2' or so from the banks.
The terrain is a typ Mid Atlantic "Creek Bottom" ,, pool table flat semi wooded creek bottom (100 yards wide) with 5-6' wide creek.
I plan to go back about 2' from the bank and use post hole diggers and go down about 30" with 2 holes on each side of the creek,
The 2 holes will be the width of the bridge. Put some rebar down the holes and fill them with concrete.
Then build a box form about 12" high and 5' wide , laid on the ground around the post holes,, then fill the form with concrete (reinforced with rebar).
These would be the concrete "blocks" anchored into the ground that the bridge beams would rest on.
I plan to make 2 beams for the bridge, each beam centered under the tires.
Each beam would be made out of P.T. 5 or 6 2x8x14s laminated together to make a 7-1/4" deep by 7-1/2" wide beam
Here is the part I can not find the math on,,, How much point load would said beam carry spanning 14' ?
Truthfully, it would not really be a true point load, it would be spread over the front and rear tires.
Any words of wisdom ?
Below is a picture of a foot bridge I put in about 10 years ago