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What would you tell the person who is trying to loosen the rusty nut?

What would you tell the person who is trying to loosen the rusty nut with the wrench? Move your hand farther from the nut.

Which object has the most structural strength?

The hexagon is the strongest shape known. Not many people know this but if you want something to hold a lot of weight pick a hexagon.

Why are the hoops closer together near the bottom?

Why are the hoops closer together at the bottom of the tank? The water pressure pushing against the sides of the tank is greater near the bottom.

Is it too late to cut control joints?

Cutting freshly poured concrete too late can lead to unwanted cracks in the concrete, rendering the joints ineffective. For most concrete work, cutting should take place within the first 6 to 18 hours and never beyond 24 hours.

Should control joints be filled?

Sealing or filling should be put off as long as possible to allow the joint to widen, although in practice joints are usually sealed or filled sooner than ideal. But if left unsealed or unfilled, control joints can become areas for dirt, dust, and debris to collect and cause problems.

What can I use for concrete expansion joints?

Sikaflex can be used to seal horizontal expansion joints. It’s a great product because it remains permanently flexible, dries quickly, sticks to anything, is self-leveling, and highly resistant to weather conditions. You should apply Sikaflex when the temperature is between 40F-100F.

Is it normal for a house slab to crack?

A crack in a slab of 1/8 inch or less is typically a normal shrinkage crack and not a cause for concern. If the crack is larger or growing larger (an “active” crack), or one side of the crack is higher than the other, then you may need to have the work reviewed by a structural engineer.

How do you fix a cracked slab on a house?

Slab Foundation Repair Methods – How To Fix Cracks In A Slab Foundation

  1. Foam Jacking. Polyurethane foam jacking is one of the most effective ways to repair problems in your sinking or settling foundation.
  2. Masonry Patches and Sealants.
  3. Epoxy Resin.
  4. Slabjacking/Mudjacking.
  5. Piling.
  6. Steel Piers.
  7. Helical Piers.
  8. Spot Piers.

How serious is crack in foundation?

Horizontal Cracks: Horizontal cracks are a serious issue that usually indicate heavy soil pressure. This happens when water-saturated soil is exerting pressure against the wall from the outside. Such walls may eventually bow and buckle, or possibly even cave in. Horizontal cracks require immediate repair.