Methods and Requirements of SNiP- Calculation of anchor elements + Video

Methods and Requirements of SNiP- Calculation of anchor elements + Video What is an anchor or anchoring of slabs slabs. Anchor is a special fastener made of brass, steel or other metal, necessary for fixing building elements and floor slabs. They are used for construction of both large and small buildings.

Anchoring - fixing floor slabs to outer walls and to each other. Anchoring floor slabs is designed to increase the service life, strengthening the strength and stability of the building.

Anchor types

  • Methods and Requirements of SNiP- Calculation of anchor elements + Video Wedge anchor - these are bolts with a tapered head and a wedge-shaped spacer sleeve, used for concrete and brick. Anchoring is performed by friction of the sleeve against the gaps in the walls. The disadvantage is one-time use.
  • Sleeve - are used in the same way as wedge ones, and for fastening solid elements to each other. Pros - easy installation.

    Cons - large diameter connecting holes.

  • Driven - These sleeves have a notch at one end. During a strong blow, a wedge bursting occurs. The anchor is intended for slinging parts that do not have elasticity, such as stone and concrete. It is excellent to use such an anchor with materials of great strength.

    Pros - great reliability and ease of installation. Cons - overestimated requirements for the accuracy of the dimensions of the gaps.

  • Chemical - parts are attached by gluing. Pros - ease of use. The cons are very costly.

Anchors for special applications:

  • frame (for parts of windows and doors) ceiling,
  • foundation and
  • Molly - for hollow and weak foundations.

Equipment for anchoring plates

  1. anchor of the desired type and size
  2. equipment for drilling (hammer drill)
  3. device for bending steel elements
  4. cement mortar.

There are many mounting options, it all depends on the material used. Anchoring of slabs to the walls of a brick house is carried out with steel elements in the form of G, stepping back 3 meters from each other. Be sure to concrete the metal at the end of the fastening work.

This will protect against corrosion.

If it is necessary to leave a channel for wiring, it is allowed to support the plates on adjacent panels. Here you need curved rods of class A-P from 12 mm. Composite anchors must be welded together. When fixing hollow-core slabs to block bricks made of silicate or foam, a steel anchor MKT with an internal thread is required.

Helpful hints

In the process of bonding plates, it is necessary to take into account the recommendations described below.

Plates are laid in one plane. When laying blocks, leave space to the outer edge for mandatory insulation. Proceed to anchoring after completing the installation of the milestones. The panels should be connected by welding or by bundling the reinforcement protruding from them, as well as using an armored belt.

(option for slabs without lugs).

Avoid damaging the reinforcement when drilling holes in the plates. Do not use defective materials. Suspend work during precipitation.

Anchoring can be started immediately after installation of all parts.

It is advisable to prepare a plan before starting work. The anchor must be bent into a loop and hook the plate loop. After the maximum tension, the anchor can be welded to the slab hinges. Further, all the joints between the slabs should be immediately laid with cement mortar to avoid the ingress of debris, water and snow. If water does get in, you will have to drill holes from the bottom of the slabs and thus let the water drain.

What can cause fastener failure:

  1. Pulling out the bolt - from the attached material.
  2. Bolt shear - when the permitted load is increased.
  3. Complete destruction of the product - at the moment of the bolt fracture.
  4. Tearing off the base of the fastener - the complete unsuitability of the anchor.
  5. Corrosion.

SNiP requirements (Building Norms and Rules)

According to SNiP II-22-81 anchoring of slabs to different structures elements of buildings must be made in a certain order: Stone walls of the structure and supports are mounted with floor anchors, with a cross-sectional area of ​​more than 0.5 cm2. The maximum allowed gap between slab anchors, with wall support is not more than 6 m.

Calculation of anchor elements is extremely necessary - in case of asymmetric change in the thickness of the supporting walls on which the slabs are laid, and also when the distance from the anchor to the anchor is more than 6 m. Typically, anchor ties are made of metal reinforcement with a diameter of 10 mm or more, and the anchoring length is more than 500 mm.

( 3 marks, average 1.33 of 5 )