Erection of

pre-engineered buildings and steel structure

is the last step in our building process that all the components from the previous steps come together.

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General Rules

• Build column combing with purlins (if any), brace column together. Then, continue building rafters after adjusting column.
• Install the inside truss frames, and then proceed to erect the outside ones (according to the movement of truck crane – see the enclosed construction drawing)
• Begin erecting from the braced bay.
• Settle two construction frames at the braced position before placing new frame. This process is translated for the next frame.
• Have to have temporary brace during the erection process. Use purlins with the bracing cable to locate, and link all the rafter frames.
• Erect steel panel after adjusting rafter frame and straight purlin, clean up, and paint all scratches on the rafter and purlin. Use chalks or stretch attached wires to locate or mark axis positions in order to balance the steel panel when to complete the covering.
• Set foot on the bottom waves when walking on the roof. Steel panel may be crashed if stepping on the high waves, which can cause deformation or leaking.
• Do not walk on bright panels.

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Erection Steps

Step 1: Prepare before erection

Check the erection equipment, and materials, including: quantity, safety, quality…

Step 2: Erect column and bracings

The intermediate or interior frames nearest the bearing endwall are usually erected first. This bay usually contains the diagonal bracing. Erect the columns first, tie them together with the sidewall girts and tighten the anchor bolts. Tie all the temporary bracings before releasing the crane load.

Step 3: Erect rafter

After the columns have been erected, the ground-assembled rafter is hoisted into place and connected to the columns. The rafters are assembled on the ground that need to install the flange braces & tighten the splice joints. The flange brace should be bolted to the rafter prior to raising in order to save time. Lift & erect the rafter assembly, ensure to tie enough guy wire ropes & tag lines.

Step 4: Install purlins and girts

Galvanized steel purlins are usually formed in shapes C, Z ... with purlins distance from 1m - 1.5m. Purlins are linked to the main steel frame to support the roof system. All purlins, girts, and eave struts are installed in the braced bay and the entire bay plumbed, aligned and braced before proceeding further. If the building is designed without cable bracing, the erector is responsible for providing temporary erection bracing.

Step 5: Calibrate the first frame

Step 6: Erect next frame

Step 7: Complete installation for the rest frame

Step 8: Erect roof monitor

Step 9: Check completion before covering

Step 10: Erect covering and finish