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105 mm x 105 mm #2 Grade Hem-Fir Green S4S Dimensional Lumber
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105 mm x 105 mm #2 Grade Hem-Fir Green S4S Dimensional Lumber
This is a 105 mm x 105 mm post in No. 2 grade hem-fir, sold green and surfaced smooth on all four sides (S4S). At about 4-1/8 in. square it is a little larger than a standard 4x4, and it comes in 6, 7, 8, 9 and 10 ft lengths.
This is a metric size, not a 4x4. It is about 5/8 in. bigger in each direction than a nominal 4x4 at its dry size of 3-1/2 in., so it will not fit 4x4 post bases, brackets or sleeves. It is also sold green, so it holds moisture above 19%, shrinks as it dries and can check or twist. Check your hardware against the 105 mm size before you order.
Features and Common Uses
- No. 2 grade hem-fir, a framing grade used for structural and non-structural work
- Hem-fir is a species group of western hemlock and true firs, light in weight and easy to work
- Green, with a moisture content above 19%, so it is soft to cut and drill
- Surfaced smooth on all four sides (S4S) for square edges and consistent faces
- Metric 105 mm section, a stouter post than a standard 4x4
- Not pressure treated, so it is for dry, above-ground use
Commonly used for:
- Posts for pergolas, porches and covered structures
- Fence, gate and sign posts in dry or covered locations
- Heavy blocking, bracing and forming
- Projects built to metric drawings or imported plans
Specifications
| Product | 105x105 mm No. 2 Hem-Fir, Green, S4S |
|---|---|
| Species | Hem-fir |
| Grade | No. 2 |
| Size | 105 mm x 105 mm (about 4-1/8 in.) |
| Available lengths | 6, 7, 8, 9 and 10 ft |
| Moisture content | Green, above 19% |
| Surfacing | S4S, surfaced on four sides |
| Pressure treated | No |
Grade, species and moisture marks are stamped on each post and are the governing record for what you receive. Green lumber changes size as it dries, so the finished size can settle slightly under 105 mm. Confirm the dimensions you need at the counter before you order.
Frequently Asked Questions
Is 105x105 the same as a 4x4?
No. A 105 mm post is about 4-1/8 in. square, while a dry 4x4 measures 3-1/2 in. square. The two are not interchangeable with post bases, brackets or sleeves sized for a 4x4.
What is hem-fir?
Hem-fir is a commercial species group made up of western hemlock and true firs. The wood is lighter and softer than Douglas fir, and it is graded and sold together as a single group.
What does green lumber mean?
Green means the post has not been kiln dried and holds moisture above 19%. It is easy to cut and nail, but it shrinks as it dries and can check, twist or cup.
What does S4S mean?
S4S means surfaced on four sides. All four faces are planed smooth, so the post has square, consistent edges and no rough-sawn surface.
Can I bury it in the ground?
No. It is not pressure treated, so it will rot in ground contact or constant wet. Choose pressure treated lumber for buried posts and outdoor structures.