• Beams should be stored and transported in the vertical position.
  • Do not store beams directly on the ground. 
  • Protect beams from direct effects of adverse weather conditions. 
  • Use spacers to separate individual packages, locating them not further than 2 m from one another.
  • Packages should not be stored higher than 3 m.
  • Do not open packages until directly before assembly. 
  • Protect beams against damage by a lift or crane. 
  • Do not twist or exert loads on beams when in the horizontal position. 
  • When lifting beams by crane, remember to: lift entire packages of beams, exactly as they have been delivered, positioning the packages in such a way as to make sure that beam webs are in the vertical position. 
  • upport packages properly on the ground to reduce deflection.
  • Handle individual beams with care and protect them from damage during measuring and cutting; handle vertically, not horizontally.

Rules of floor use

There are a number of factors affecting floor use. Users have varying expectations regarding floor “behavior”. The requirements presented below will make it easier to design the floor for maximum user satisfaction:

  • To perform their tasks properly, beams must be assembled in dry and well ventilated places.
  • By fixing the floor to beams with an adhesive, you will make it stiffer and avoid squeaking (nails are a must).
  • Thicker flooring made from SWISS KRONO OSB/3 improves its performance.
  • By using beams that are higher than required, you will make the floor more rigid.
  • The application of transverse bracings, stiffenings or locks enhances floor performance.
  • Correct assembly performed by a qualified company is the key factor determining the final effect.

Careful dry storage on building site, maintaining minimum support depths, clean sheathing assembly, as well as accurate performance of all attachments (nails, adhesive) are vital for achieving the desired outcome.

Safety of assembly

Beams are not stable until completely assembled and carry no loads until completely stiffened and covered with sheathing.
Avoid unexpected situations by following the instructions given below:

  • Immediately after positioning, stiffen and fix each beam using slings, locking boards, edge boards or transverse bracing at beam ends.
  • Do not remove temporary stiffening until the final assembly of sheathing.
  • Temporary stiffening elements must have the minimum dimensions of 2.5 x 10 cm and be at least 2.5 m long.
  • Stiffening elements must be fixed to the upper beam surface with at least two smooth nails 3.8/60 mm.
  • Place the ends of adjacent stiffening elements on at least two beams.
  • For load-bearing beams, stiffen upper and lower flanges, as well as face surfaces with edge boards.
  • Fix the permanent sheathing to the beams before placing any load on the floor. Store building materials only on support beams or walls.
  • Never assemble or repair damaged beams.
  • To avoid axial movement of continuous stiffening line, anchor it to a stable end wall or an area stiffened by fixed sheathing.
  • All edge beams and temporary stiffening must be assembled before building contractors enter the structure.
  • Only builders’ weight is allowed on the structure before completing the installation of sheathing.
  • After the installation of sheathing do not overload beams beyond the designed loads.
  • Use beams according to their intended application.
  • Sometimes alternative assembly rules should be followed, however the decision can only be made by an authorised designer.

Assembly instructions of BS-D beams

  • Before assembling the entire flooring system, check whether the width of the beam arm is the same as the width of the sling.
  • Except for cutting to the desired dimensions, never cut, bore or notch beam arms.
  • Fix the beams making sure that the upper and lower arms are aligned vertically.
  • Beams must be fixed and stiffened before placing floor sheathing. Pillars and walls supporting beams at large spans must be aligned on the same level.
  • Minimum support lengths: 5 cm for end supports and 10 cm for intermediate supports..
  • Using slings, place the beams carefully at the bottom to avoid subsequent beam sagging.
  • Leave a 2 mm clearance between the end of the beam and header.
  • Concentrated loads, higher than standard loads adopted for residential structures should only be carried through the upper beam flange. Do not place high loads on the lower beam flange. Whenever possible, place all concentrated loads on the upper beam flange or web reinforcement. Never mount beams in locations that would constantly expose them to weather conditions or contact with concrete.
  • Beam ends must be secured properly to protect them against overturning. For this purpose, you can use edge boards, edge beams or locking beams
  • Beams mounted on bearing walls or below them must be reinforced to the full beam height (see construction details) to carry load from the dead load through the flooring system to the wall or foundation.
  • Nails placed in the upper beam flange must be positioned according to assembly guidelines and facility plans.

Assembly dos and dont's:
 1. Do not cut holes with a diameter larger than 3.5 cm closer than 2.5 cm to the support.

2. Holes must not be too large. Do not damage beam flanges.

3. Do not hit beam flanges with a hammer, as you might damage them.

4. Do not notch or cut flanges.

5. Do not cut out beam flanges to avoid damage.

6. Do not hammer closer than 5 cm to the end of the beam.

7. Do not cut the upper beam flange beyond the inner edge of the support.

8. Do not support the beam on the web.

9. Reinforcement to the full height of the girder beyond the slings is required.

10. Reinforcement to the full height beyond slings, both in the beam and in the girder, is required.

11. Reinforcement should cover the entire girder.

12. Reinforcement to the full height beyond slings, both for the beam and for the girder, is required.

13.All slings must be aligned vertically, without slanting.