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How much weight can a deck handle?

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  • Jun 6th, 2021 8:10 pm
[OP]
Newbie
Oct 16, 2019
63 posts
36 upvotes

How much weight can a deck handle?

We're thinking of getting patio furniture for our deck that already has planters, etc that're heavyish. How much added weigh would the deck be able to handle? The furniture is roughly ~100 kilos. The deck is ~200-300 sq ft or so.
17 replies
Sr. Member
Nov 6, 2014
809 posts
1354 upvotes
Woodbridge, ON
All depends on design/construction. 2x6 or 2x8 joist. Spacing of joist. Wood deck boards or composite. Deck span and footings. That said, 100Kg is not much and is the equal to roughly 2-3 people. IF the furniture is multiple pieces, you're spreading the load across multiple joists instead of 2. I'd say you're fine.
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Feb 25, 2015
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York Region
If your deck was built to code, nothing to worry about.
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Oct 16, 2008
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Maple
The deck should be sturdy and carry over few thousands lbs, if built right. It also depends on materials and specs.
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Feb 11, 2007
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Oakville
Post a pic of your deck and the support underneath.
If the women don't find you handsome, they should at least find you handy.
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Sep 1, 2005
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Markham
100kg which is the same weight as a bigger person [and the weight is more spread out] should be no problem for any deck as long as it's built reasonably well.
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Jan 6, 2002
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fordmaple wrote: 100Kg is not much and is the equal to roughly 2-3 people.
You must only hang out with jockeys and gymnasts.
As someone long prepared for the occasion, in full command of every plan you wrecked---
Do not choose a coward's explanation, that hides behind the cause and the effect...
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Oct 13, 2008
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buckabeer wrote: We're thinking of getting patio furniture for our deck that already has planters, etc that're heavyish. How much added weigh would the deck be able to handle? The furniture is roughly ~100 kilos. The deck is ~200-300 sq ft or so.
Depends on how it was done ... what joists?? what is the distance between the joists? etc
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Member
Feb 7, 2018
351 posts
462 upvotes
Decks built minimally to code on blocks and 2x6 joist should hold roughly 50 lbs/sf as a static load.

Patio furniture is rarely an issue. It’s too many people, huge gazebos, brick fire pits, and crazy planter box configurations that can cause problems if you just barely built it to code.
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Dec 27, 2009
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Victoria, BC
fordmaple wrote: That said, 100Kg is not much and is the equal to roughly 2-3 people.
2-3 people? 100Kg is one good sized man (or chunky woman). Maybe 2 very light women.

If OP's deck can't handle 100Kg of furniture then something is very wrong.
Deal Expert
Feb 7, 2017
16550 posts
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Eastern Ontario
Chickinvic wrote: 2-3 people? 100Kg is one good sized man (or chunky woman). Maybe 2 very light women.

If OP's deck can't handle 100Kg of furniture then something is very wrong.
This

100 Kg = 220 Lbs

Average woman 125 to 150 Lbs
Average man 170 to 200 Lbs

But 220 is far from unheard of

It’s not we are talking a Pro Football Player
Like William Perry “the Fridge” who tipped the scales at 150+ Kgs (335 lbs )

A properly built deck to code, should be able to easily hold 1000+ Lbs

Where people run into deck issues is most often when they decide to add a hot tub on top
Not realizing that water is extremely heavy ... 8.33 Lbs per gallon
You add the hot tub itself, 1000+ Litres of water (500+ gallons )
PLUS the people in the tub
And things add up quickly
For support stress over a relatively small footprint (say 8 feet x 8 feet )
Deal Guru
Jan 25, 2007
10214 posts
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Paris
There is also a BIG difference between live load (people) and dead load (furniture and snow). Those days in south western ontario when we get 14” of snow and then you dont get to shovel it before it rains then freezes again I bet your deck is carrying an additional 2000 pounds plus spread out perfectly. I remember one winter I had about 8” of ice I didnt get to in time when I was away and it stayed for a solid month


Personally i would take 100 kg of patio furniture over one dancing drunk friend at 65kg.
Deal Addict
Dec 18, 2017
1037 posts
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London, On
Think of a comparable space in your house and how much furniture and stuff you have in a large room and how many people you may put in there on occasion. A properly built deck is going to be similar construction. So as the first reply says, it's about how the deck is built.
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Nov 21, 2013
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buckabeer wrote: We're thinking of getting patio furniture for our deck that already has planters, etc that're heavyish. How much added weigh would the deck be able to handle? The furniture is roughly ~100 kilos. The deck is ~200-300 sq ft or so.
Too many factors to take into consideration to answer this on a forum...
fordmaple wrote: All depends on design/construction. 2x6 or 2x8 joist. Spacing of joist. Wood deck boards or composite. Deck span and footings. That said, 100Kg is not much and is the equal to roughly 2-3 people. IF the furniture is multiple pieces, you're spreading the load across multiple joists instead of 2. I'd say you're fine.
I, by myself, weigh a little less than 90 Kg. 100 Kg for 3 people? must be young teens that do not eat junk ;)
Deal Expert
Feb 7, 2017
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Eastern Ontario
hoob wrote: You must only hang out with jockeys and gymnasts.
Lol, just realized the OPs concerns over the weight of furniture + entertaining his friends on his patio
Might relate to his Username

Big Beer Bellies = Heavy Dudes
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Nov 21, 2013
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PointsHubby wrote: Lol, just realized the OPs concerns over the weight of furniture + entertaining his friends on his patio
Might relate to his Username

Big Beer Bellies = Heavy Dudes
Heavyer than 100 Kg for 3 Beer bellies dude for sure 🤣
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Jul 7, 2017
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SW corner of the cou…
I like looking at elevator ratings worldwide and calculate the average weight of a standard person (of course there is probably a safety margin that is not stated). A lot of these limits must be grandfathered in for older units as the weights don't reflect reality. Most of equipment is geared for the U.S. where the average self-reported weight of an adult is 181 lbs (~82 Kg).
hoob wrote: You must only hang out with jockeys and gymnasts.
They might be light in total weight but can be incredibly dense (as in weight/volume) due to muscle and bone. Beer-belly dudes may be heavy but are less dense in comparison.
I smile when I see container ships sailing past my house laden with stuff made in China
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Dec 12, 2009
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If a deck could not hold 100 kg, then it would not be able to hold its own weight without distortion.
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