Line Load from a deck
Line Load from a deck
(OP)
Hi there,
a timber deck has been put behind a 1m high retaining wall, I have to check the capacity of a this wall due to the new loading, I know how to get earth pressure, but how would you convert a point load from the deck post applied on the wall to a thrust? or what is the easiest way to check this wall?
a timber deck has been put behind a 1m high retaining wall, I have to check the capacity of a this wall due to the new loading, I know how to get earth pressure, but how would you convert a point load from the deck post applied on the wall to a thrust? or what is the easiest way to check this wall?





RE: Line Load from a deck
Use the attached equations for all applicable surcharges.
RE: Line Load from a deck
RE: Line Load from a deck
thanks for your attention and help.
the footings are very close close to the wall and about 300-400mm deep. the footing will cause a point load, and my from calcs the footing will induce a 3.41kN point load, how would I convert this into horizontal thrust?
your help is much appreciated
RE: Line Load from a deck
If the amount of earth retained is three feet, then the effect can be ignored if the deck footing is no closer than 3 feet to the wall.
If the total height of the wall is three feet, bottom of footing to top of wall, then you could be 1 to 2 feet from the wall with little or no effect.
Can you provide a quick sketch showing the relative dimensions?
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Line Load from a deck
a sketch of the wall is attached. I just to know how to convert that 3.14kN point load to a horizontal thrust,
thanks for help
RE: Line Load from a deck
I did not calculate the loads, but this should be a small number, and doubt it is a concern. And remember, it will just affect a localized area on the wall. Overtuning effect on the wall due to the footing load is not a concern, because the applied force on the wall due to the footing load will affect the wall almost to the bottom.
By the way, what type of wall, and what type of soil is contained behind the wall?
Just another comment based on your wording: "I have to check the capacity of a this wall due to the new loadingf". I believe it should be worded that you have to check the effect of the timber deck footing load on the retaining wall, or re-evaluate the factor of safety of the wall against overturning due to the footing load of the deck. ie. I don't believe the capacity of the wall change due to this load.
Hope this helped.