RancherRob
Member
- Joined
- Jun 18, 2012
- Messages
- 8
So after perusing all the other concrete specifications, mostly for garage floor slabs, I've come up with a spec sheet for my driveway to the garage for your approval. It's a little heavier duty as I like restoring old tractors and military trucks. Let me know what your opinion is:
The scope of Work is as follows:
1. Pave 4 driveway pads. 3 at each of the main garage doors and one for the length of back basement ramp between retaining walls plus 6' additional reverse slope flat apron.
2. Concrete - All to be Glacier 242 mix with microfiber at minimum of 5" thick. Contractor will perform slump tests of each load and enforce a 5" maximum slump.
3. Reinforcement - All slabs to have supported rebar at 15"-17"" o.c., both ways and slab perimeter loop, and 1.5"-2" distance to edges and 2.5" from top surface (centered T&B). Supported at least every 4'.
4. Rebar to be #4 (1/2") grade 60 or better, astm 615 compliant and overlapped 6" minimum and wire tied at splices and supports.
5. Garage Slabs - 50' long and width of garage door openings (approx. 8', 8' &12'). Starting garage slab at height of garage slab to 3/8" lower and sloping away and down at 1/4" per foot (2% grade)
6. Back Ramp slab - To slope between basement slab and top of slotted drain. Also to slope 0.5% - 2% (1/16" - 1/4" per foot) inward from sides to center. Slab to be at same height or upto 1/4" max. below basement slab and at same height to 1/4" above top of slotted drain. 6' apron past retaining wall to slope down away from house at 10% (2"/foot)
7. Finish - All to be medium broom finished and have rounded edges. Control Joints are to be cut down the middle lengthwise of slabs and cross wise every 10' and at 25% depth of slab +- 5%.
8. Contractor guarantees for 2 years against cracking larger than 0.5mm wide (other than in control joints), crazing, settling, less than 4k psi strength at 28 day cure, voids larger than 1", water ponding, spalding/scaling, and cold joints and/or rock pockets.
Thanks for sharing your expertise and experiences,
Scott
The scope of Work is as follows:
1. Pave 4 driveway pads. 3 at each of the main garage doors and one for the length of back basement ramp between retaining walls plus 6' additional reverse slope flat apron.
2. Concrete - All to be Glacier 242 mix with microfiber at minimum of 5" thick. Contractor will perform slump tests of each load and enforce a 5" maximum slump.
3. Reinforcement - All slabs to have supported rebar at 15"-17"" o.c., both ways and slab perimeter loop, and 1.5"-2" distance to edges and 2.5" from top surface (centered T&B). Supported at least every 4'.
4. Rebar to be #4 (1/2") grade 60 or better, astm 615 compliant and overlapped 6" minimum and wire tied at splices and supports.
5. Garage Slabs - 50' long and width of garage door openings (approx. 8', 8' &12'). Starting garage slab at height of garage slab to 3/8" lower and sloping away and down at 1/4" per foot (2% grade)
6. Back Ramp slab - To slope between basement slab and top of slotted drain. Also to slope 0.5% - 2% (1/16" - 1/4" per foot) inward from sides to center. Slab to be at same height or upto 1/4" max. below basement slab and at same height to 1/4" above top of slotted drain. 6' apron past retaining wall to slope down away from house at 10% (2"/foot)
7. Finish - All to be medium broom finished and have rounded edges. Control Joints are to be cut down the middle lengthwise of slabs and cross wise every 10' and at 25% depth of slab +- 5%.
8. Contractor guarantees for 2 years against cracking larger than 0.5mm wide (other than in control joints), crazing, settling, less than 4k psi strength at 28 day cure, voids larger than 1", water ponding, spalding/scaling, and cold joints and/or rock pockets.
Thanks for sharing your expertise and experiences,
Scott
just be prepared to pay accordingly.