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Fork head props

Props made with fork already welded to support the beam in the shoring system.

In this page:

About fork head props,
Loads table,
Catalogue in pdf format,
GBM shoring props: data sheet

About GBM forked prop

Props made with fork already welded to support the beam in the shoring system. They're also known as BM-Bouwstempel and schroefstempel.

Fork head props manufactured according to the customer's ABOMA.

Also known as Bm-Stempel and Bm-Bouwstempel, they come in 4 models with different extension and capacity:

GBM 30
extensible between 1,80 and 3,00 metres
GBM 36
extensible between 2,10 and 3,60 metres
GBM 41
extensible between 2,40 and 4,10 metres
GBM 50
extensible between 2,90 and 5,00 metres

Below are the features of GBM fork head prop:

hook bevelled at the ends: easier to insert into the holes thanks to the ergonomic shape;
anti-shearing system: the greater length of the inner pipe with respect to the inner one enables guaranteeing an at least 10 cm difference between the two so as to prevent injury;
inner holes obtained using machines capable of perfectly machining them or by means of a milling system which obtains turnings on the surface of the pipe: both ways enable guaranteeing the complete absence of burrs near the holes;
inner pipe anti-slip-off system, so as to prevent the pipe from inadvertently slipping off thus guaranteeing wholeness and safety when laying down and displacing at the worksite;
hot-dip galvanization, with guaranteed minimum thickness of 50 microns.

Upon request:

sticker customised with customer's logo, bearing information on capacity and maximum extension;
quick release system, an accessory that guarantees release of the prop under the load by just hitting with the hammer to quicken and simplify the release procedure as well as reduce the operator's effort.

Beware: the capacities indicated in the table always refer to the capacity of the single post shore. Higher capacities can be achieved by binding, gate-like systems or pipe-coupling systems. The gate-like system is a temporary structure suitable for creating a loading tower. Binding the props in fours enables maximising the capacity. The pipe-coupling system provides for a pipe above and beneath with couplings, it is the same figure of the gate, which is more economic though less quick.

GBM Fork head props loads table

We - at GBM - manufacture 4 different models of Fork head props (GBM 30, GBM 36, GBM 41, GBM 50). They are classified according to maximum extension and capacity. Below are their technical features.

Download the fork props loads table

Dimensions table

Inner diameter	mm	48,30
Outer diameter	mm	57,00
Plate	mm	120x120x8
Fork thickness	mm	8
Hook diameter	mm	15

Extension	Model
	GBM 30	GBM 36	GBM 41	GBM 50
(metres)	(kN)	(kN)	(kN)	(kN)
5,00				8,20
4,90				8,60
4,80				8,90
4,70				9,30
4,60				9,70
4,50				10,30
4,40				10,80
4,30				11,30
4,20				11,90
4,10			11,30	12,40
4,00			12,00	12,90
3,90			12,70	13,40
3,80			13,40	14,40
3,70			14,10	15,40
3,60		12,50	14,80	16,40
3,50		13,30	15,50	17,40
3,40		14,20	16,20	18,40
3,30		15,00	16,90	19,30
3,20		15,90	17,60	20,30
3,10		16,70	18,50	21,30
3,00	16,50	17,50	19,30	22,30
2,90	17,40	18,40	20,20	23,30
2,80	18,30	19,20	21,10
2,70	19,20	19,80	21,90
2,60	20,10	20,40	22,80
2,50	21,00	21,00	23,60
2,40	21,90	21,70	24,50
2,30	22,10	22,30
2,20	22,20	22,90
2,10	22,40	23,50
2,00	22,50
1,90	22,70
1,80	22,80

GBM props catalogue

Would you like to view the full GBM props catalogue?

Download the full catalogue in pdf format (5 MB)

Or go straight to the online version.

GBM Shoring Props: Data Sheet

GBM shoring prop specifications, data sheet & capacity tables: maximum extension, minimum extension, inner tube, outer tube, weight, compression... If you want to know it all, just...

Download the datasheet of our shoring props (PDF / 0.1 MB)