Minimum diameter of bolts (mm
Existing mounting bolts (12) are replaced with longer replacement bolts (100).
The heads (31A) of the bolts (31) are housed within bolt head housing spaces (29) formed at the bolt head receiving seats (28).
Each of the bolts (1) has a handle.
No modification of the bolts or washers is required.
Direct bolts are used in assembly of segments.
The corner bolts (15) pass through holes 15 in the top plate, which have a greater diameter relative the diameter of the bolts.
If the distance between adjacent bolts of the plurality of bolts is compared, the distance between a specific pair of adjacent bolts is longer than any distance between the remaining pairs of adjacent bolts.
The case vault is held closed by bolts.
A sleeve is applied around the anchor bolts.
Bolts (16) clamp the halves to the shaft.
The invention relates to a nut tensioning system that enables a high tension or high pre-tension force to be applied to bolts, rock bolts and self-drilling rock bolts.
The coupling elements are threaded bolts and nuts with an outer diameter for the bolts loosely sitting in the holes.
Bolts (52, 54) may be pre-located through the closed holes, with nuts threaded onto the bolts, but not tightened.
The slots are provided for the installation of rock bolts to provide versatility for the installation of rock bolts in the tunnel.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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