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Concrete: Rebar or Fiberglass? - CR4 Discussion Thread - GlobalSpec
May 14, 2018 · I'm planning to pour a concrete driveway. The base is sand, about 15' deep. I'll be driving my truck, car and camper over it. The camper is a fifth wheel, about 10,000 lbs when loaded. Being a fifth wheel, some of the load is transferred to the truck. Is it acceptable to use the cement mix containing fiberglass fibers instead of wire mesh/rebar?
Galvanized Cattle Panel in Concrete Slab vs 1/2'' Rebar?
Feb 19, 2013 · Minimum steel, for Shrinkage and Temperature crack control, would require #4 bars @ 18" o.c. each way. For heavier wheel loads, if any, the rebar requirement can go up significantly, depending on the magnitude of the wheel loadings. Make sure that rebar is held off the gravel subbase at least 3-inches.
Bonding of Earthing Conductor to Rebar - CR4 Discussion Thread
May 26, 2014 · If the building is of steel frame construction, the column base plate bolts are usually installed wherein they are physically attached to the foundation rebar cage. The NEC requires that all exposed metal surfaces in a building are earthed/grounded and usually the columns are bonded to the equipment electrical ground using exothermic welding.
Lapping of Steel in Tie Beam Foundations - CR4 Discussion Thread
Oct 26, 2010 · Also, it depends on whether the rebar is in the top or bottom of the beam....plus there are several types of splice classes to take into consideration. Welded and mechanically lapped splices are treated totally differently that p;ain tied lap splice are staggerring of the lap splices are required a given distance. depending on the type of ...
Rebar Welded to Stainless Steel Plate - CR4 Discussion Thread
Sep 24, 2012 · Re: Rebar Welded to Stainless Steel Plate 09/25/2012 9:12 AM If I "imagine" rightly, these stainless steel cleats swill be cast in and protrude from the finished concrete face.
steel stress-strain graph - CR4 Discussion Thread
May 9, 2008 · Re: steel stress-strain graph 08/19/2008 11:27 AM If you are an uncooked noodle, you would have virtually no elongation or reduction in area, and your yield strength would have a very high standard deviation, and be virtually indiscernable from the Ultimate tensile strength.
Connecting a Roof System to a Concrete Slab
Feb 5, 2011 · The only thing that may change would most likely be the rebar requirements for both Positive & Negative Bending Moments + Shear, which may or may not increase either the rebar size or decrease the rebar spacing, not increase the slab thickness. We're probably only looking at a 100 PSF Live Load here for pedestrians.
ASTM A36 VS ASTM A992 Steel Beams - CR4 Discussion Thread
Re: ASTM A36 VS ASTM A992 Steel beams 07/04/2010 1:33 PM The original 50ksi steels couldn't meet some of the A36 requirements, A992 combines them both in one steel.
Solution to Corroding Pipes Near Cooling Towers
Mar 28, 2013 · Steel is good for underground if you have a good initial coating and adequate cathodic protection. Above ground, fiberglass and other non metallic pipes have been used in power plants for over 50 years. With good surface preperation and a marine grade coating you should be able to go several years between recoating.
Anchoring Threaded Fasteners In Bedrock With Epoxy
Apr 23, 2011 · These construction epoxies are the hot setup for tying in rebar to existing concrete foundations. The fellow who repaired my house foundation after the Loma Prieta earthquake was a sharp engineer who knew what he was doing. He drilled 5/8 inch holes 6" into the concrete for 1/2" rebar and then filled them with a product just like the Hilti product.