Daver 520 tie bar system

Fork end tie rods in Grade 520 carbon steel and stainless steel, pre-assembled and set to nominal pin-to-pin length. UKCA and CE marked to Execution Class 3.

M12 to M100 carbon · M12 to M56 stainless

Product Data

A variety of fittings are available for the DST520 system and your tie bar requirements.
All fittings and components are designed to exceed the load capacity of the bar.

These details are also available as a 2D or 3D download.

T5 Fork and Spade Dimensions

Dimension drawing of the fork and spade: fork length L, jaw depth L2, projection L1, diameter W1, thickness W2, jaw gap T2, spade thickness T1, width D1 and pin hole diameter D2

T5 Fork and Spade Dimensions
Row heading	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64	M76	M90	M100
Fork length	Lf	90	112	132	155	189	217	243	266	313	348	420	498	575
Spade length	Ls	90	112	132	155	189	217	243	266	313	373	445	523	600
Diameter	W1	18	22	29	35	43	52	60	68	80	91	108	129	143
Thickness	W2	24	28	35	42	52	64	74	84	95	120	148	170	181
Jaw gap (fork only) +0/-2mm	T2	14	16	19	24	30	36	39	44	49	59	76	86	91
Spade thickness	T1	10	12	15	20	25	30	35	40	45	55	70	80	85
Width	D1	32	43	51	62	79	93	107	121	145	167	199	246	287
Pin hole diameter	D2	13	17	21	25	31	37	43	50	58	66	78	96	111
Projection	L1	21	27	33	41	52	61	69	78	96	110	131	161	188
Jaw depth (fork)	L2	25	30	42	50	59	68	70	87	105	120	141	171	198

All dimensions in mm.

T6 Accessories

Dimension drawing of the connection plate (pin hole D2, projection L1, clearance L3, thickness T1) and centre disc (overall diameter OD, centre hole ID, pitch circle PCD, pin holes D2, thickness T1, angle to suit, minimum 45°)

T6 Accessories
Connection Plates	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64	M76	M90	M100
Thickness	T1	10	12	15	20	25	30	35	40	45	55	70	80	85
Pin hole diameter	D2	13	17	21	25	31	37	43	49	57	65	78	96	111
Projection	L1	21	27	33	41	52	61	69	78	96	110	131	161	188
Clearance	L3	32	38	52	62	74	87	97	107	125	140	161	196	222
Grade plate to BS EN 10025		S355	S355	S355	S355	S355	S355	S355	S355	S355	S355	S355	S355	S355

Ensure clearance for paint/galvanising

T6 Accessories (2)
Centre Discs	Name	M12	M16	M20	M24	M30	M36	M42	M48	M56
Thickness	T1	10	12	15	20	25	30	35	40	45
Overall diameter	OD	145	185	245	285	350	420	490	560	660
Centre hole	ID	50	60	70	90	100	120	140	160	200
Pin hole diameter	D2	13	17	21	25	31	37	43	49	57
PCD	PCD	110	140	180	210	260	310	360	410	480
Grade plate to BS EN 10025		S355	S355	S355	S355	S355	S355	S355	S355	S355

All dimensions in mm. Ensure clearance for paint/galvanising. For stainless steel connection plates or centre discs, marine grade stainless with a minimum tensile strength of S355 must be used.

T7 Accessories

T7 Accessories
Pinsets	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64	M76	M85	M90	M100
Pin Diameter	D3	12	16	20	24	30	36	42	48	56	64	76	94	94	109
Pin body length	W2	24	28	36	43	53	65	75	86	96	121	153	173	173	183
End cap diameter	D4	20	25	32	35	50	55	60	60	70	86	100	120	120	140
End cap thickness	C	3	5	6	6	10	10	12	12	12	14	15	20	20	20

T7 Accessories (2)
Lockcovers	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64	M76	M85	M90	M100
Lockcover diameter	W1	18	22	29	35	43	52	60	68	80	91	108	129	129	143
Fork lockcover length	L5	25	26	40	45	50	55	60	60	75	85	91	126	126	134
Turnbuckle lockcover length	L6	30	33	78	84	87	93	102	105	106	112	118	153	153	160

Dimension drawing of tie bar accessories: pin set (C, D3, D4, W2), turnbuckle lockcover (L6, W1), fork lockcover (L5, W1), cross coupler and turnbuckle (L4, L7, L8, W1, W2) and coupler (L3, W1)

T7 Accessories (3)
Turnbuckles/Couplers	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64	M76	M85	M90	M100
Coupler length	L3	37	45	53	64	75	89	100	115	135	145	165	195	195	215
Coupler/turnbuckle diameter	W1	18	22	29	35	43	52	60	68	80	91	108	129	129	143
Turnbuckle length	L4	70	85	144	155	170	180	195	210	230	240	268	290	290	315

T7 Accessories (4)
Cross Couplers (α min 40°)	Symbol	M12	M16	M20	M24	M30	M36	M42	M48	M56
Length	L7	85	105	130	152	180	215	247	286	334
Diameter	W1	25	29	36	43	53	63	75	85	99
Slot width	W2	14	18	22	26	32	38	44	50	58
Long length	L8	52	65	80	92	112	135	157	180	210
Lockcover length	L6	35	41	51	61	75	89	106	120	140
Lockcover diameter	W1	25	29	36	43	53	63	75	85	99

All dimensions in mm.

Alternative Tendon Arrangements:

These are our standard range of fittings.

We can manufacture special central and end connection details to your specific design and construction requirements.

For example : special machined forks, spade end couplings, special pins, plate connections, cross couplers and fabricated brackets.

Please contact us to discuss your specific requirements.